Siemens Sed2 Vfd Electronic Bypass Option 125 3208 User Manual

SED2 VFD Electronic Bypass Options  
Operating Instructions  
Item Number 125-3208, Rev. FA  
SED2 VFD Electronic  
Bypass Option  
Operating Instructions  
NOTICE  
The information contained within this document is subject to change without notice and should not be  
construed as a commitment by Siemens Building Technologies, Inc. Siemens Building Technologies, Inc.  
assumes no responsibility for any errors that may appear in this document.  
All software described in this document is furnished under a license and may be used or copied only in  
accordance with the terms of such license.  
WARNING  
The Siemens Building Technologies SED2 Variable Frequency Drives are shipped without EMC line filters.  
(The EMC filter is most commonly used in Europe.) Where local codes or customer/installation requirements  
dictate, separately orderable Class A line filters are available. More stringent Class B line filters are also  
available for most models. Installation of these filters satisfies the requirements for the EU's EMC directive.  
SERVICE STATEMENT  
Control devices are combined to make a system. Each control device is mechanical in nature and all  
mechanical components must be regularly serviced to optimize their operation. All Siemens Building  
Technologies, Inc. branch offices and authorized distributors offer Technical Support Programs that will  
ensure your continuous, trouble-free system performance.  
For further information, contact your nearest Siemens Building Technologies, Inc. representative.  
CREDITS  
Product or company names mentioned herein may be the trademarks of their respective owners.  
Copyright © 2007 by Siemens Building Technologies, Inc.  
TO THE READER  
Your feedback is important to us. If you have comments about this manual, please submit them to  
Country of Origin: US  
Table of Contents  
Table of Contents  
How to Use this Manual................................................................................................  
1
Manual Organization..................................................................................................  
Manual Notations.......................................................................................................  
Where To Send Comments .......................................................................................  
Reference Documents...............................................................................................  
1
1
2
2
Safety Instructions........................................................................................................  
Electronic Bypass Option Overview ...........................................................................  
3
4
General Description...................................................................................................  
Controller Board.........................................................................................................  
Contactors..................................................................................................................  
Keypad Functions ......................................................................................................  
4
5
6
6
Installation Instructions ...............................................................................................  
9
Environmental Conditions..........................................................................................  
Mechanical Installation ..............................................................................................  
9
9
Inspection................................................................................................................  
Dimensions and Weights ........................................................................................  
9
9
Mounting.................................................................................................................. 10  
Electrical Installation.................................................................................................. 12  
Startup Procedures....................................................................................................... 19  
Safety Precautions..................................................................................................... 19  
Installation Inspection ................................................................................................ 19  
Power-On................................................................................................................... 19  
Quick Commissioning................................................................................................ 21  
Additional Parameter Settings ................................................................................... 31  
Flying Start .............................................................................................................. 31  
Automatic Restart.................................................................................................... 33  
Vdc Controller.......................................................................................................... 36  
Pulse Frequency ..................................................................................................... 37  
Motor Data Identification ......................................................................................... 38  
Reset to Factory Defaults........................................................................................ 40  
Required SED2 Parameter Settings............................................................................ 41  
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SED2 VFD Electronic Bypass Option Operating Instructions  
Application Feature Setup ........................................................................................... 42  
Overview.................................................................................................................... 42  
Auto Bypass without Interlock.................................................................................... 42  
Description .............................................................................................................. 42  
Settings ................................................................................................................... 43  
Example SED2 Settings.......................................................................................... 43  
Interlock ..................................................................................................................... 44  
Description .............................................................................................................. 44  
Settings ................................................................................................................... 44  
Wiring Example for Interlock ................................................................................... 46  
Essential Services...................................................................................................... 46  
Description .............................................................................................................. 46  
Settings ................................................................................................................... 47  
Wiring Example for Essential Services ................................................................... 47  
Interlock and Auto Bypass on VFD Fault................................................................... 48  
Description .............................................................................................................. 48  
Settings ................................................................................................................... 48  
Wiring Example for Interlock and Auto Bypass on VFD Fault ................................ 48  
Technical Specifications.............................................................................................. 49  
Troubleshooting............................................................................................................ 51  
Power-on Initialization Failure (Unit Fault Condition) ............................................... 51  
Override Jumper ........................................................................................................ 52  
Fuses ......................................................................................................................... 52  
ii  
Siemens Building Technologies, Inc.  
How to Use this Manual  
How to Use this Manual  
Manual Organization  
This manual contains the following sections:  
How to Use this Manual, describes the organization of this manual and the  
symbols used throughout this manual.  
Safety Instructions, provides general guidelines for your safety and to  
prevent equipment damage.  
Electronic Bypass Option Overview, describes the Electronic Bypass Option  
Controller board, inputs, outputs, contactors, and keypad.  
Installation Instructions, provides mounting information and details on  
electrical connections.  
Startup Procedures, provides step-by-step procedures to start up the  
Electronic Bypass Option.  
Required SED2 Parameter Settings, lists SED2 parameter settings  
necessary for operation of the Electronic Bypass Option.  
Application Feature Setup, describes application features and provides the  
necessary parameter settings.  
Technical Specifications, lists Electronic Bypass Option and SED2 VFD  
specifications.  
Troubleshooting, provides guidelines for troubleshooting the Electronic  
Bypass Option.  
Manual Notations  
Notation  
Symbol  
Meaning  
WARNING:  
Indicates that personal injury/loss of life may occur if you do  
not perform a procedure as specified.  
CAUTION:  
NOTES:  
Indicates that equipment damage, or loss of data may occur if  
you do not perform a procedure as specified.  
(no symbol) Provides other important information or helpful hints.  
Siemens Building Technologies, Inc.  
1
SED2 VFD Electronic Bypass Option Operating Instructions  
Where To Send Comments  
Your feedback is important to us. If you have comments about this manual, please  
submit them to [email protected].  
Reference Documents  
The following SED2 documentation is available from your local Siemens Building  
Technologies, Inc. representative:  
SED2 VFD Startup Operation, and Maintenance Manual (125-3201),  
provides operating instructions and procedures for the SED2.  
SED2 VFD Parameter Reference Guide (125-3214), provides descriptions of  
SED2 parameters.  
SED2 VFD Submittal Sheet (154-042), provides a synopsis of the SED2  
product line, accessories, and technical data.  
SED2 VFD Electronic Bypass Options Submittal Sheet (154-051), provides a  
comprehensive overview of the SED2 Electronic Bypass option.  
2
Siemens Building Technologies, Inc.  
Safety Instructions  
Safety Instructions  
The following guidelines are provided for your safety, to prevent damage, and to  
extend the service life of the SED2 product and any connected equipment. Read this  
information carefully. Specific Warnings, Cautions, and Notes are provided in the  
relevant sections of this manual.  
WARNING:  
The SED2 uses hazardous voltages and controls potentially dangerous  
rotating mechanical parts. Non-compliance with warnings or failure to follow  
the instructions contained in this manual can result in loss of life, severe  
personal injury, or serious damage to property/equipment.  
Only authorized personnel should work on this equipment, and only after  
becoming familiar with all local regulations and ordinances; safety notices;  
and installation, operation, and maintenance procedures in this manual.  
Successful and safe operation of this equipment depends upon its proper  
handling, installation, operation, and maintenance.  
Before carrying out any installation and commissioning procedures, you  
must read all safety instructions and warnings, including all warning labels  
attached to the equipment. Make sure that the warning labels are kept in a  
legible condition and ensure missing or damaged labels are replaced.  
Observe the regulations of Safety Code VBG 4.0 (in particular, “Permissible  
Deviations when Working with Live Parts”) whenever measuring or testing is  
performed on live equipment. Also, use suitable electronic tools.  
Only use this equipment for the purpose specified by the manufacturer.  
Unauthorized modifications and the use of spare parts and accessories that  
are not sold or recommended by the manufacturer of the equipment can  
cause fires, electric shocks, and injuries.  
Prevent the general public from accessing or approaching this equipment.  
NOTE: Keep these Operating Instructions near the equipment and available to all  
users.  
Siemens Building Technologies, Inc.  
3
SED2 VFD Electronic Bypass Option Operating Instructions  
Electronic Bypass Option Overview  
General Description  
During normal operation in a typical  
BYPASS  
CONTACTOR  
OVERLOAD  
RELAY  
application, the input and output  
contactors close and the SED2  
operates the motor (Figure 1). The  
bypass contactor provides the ability to  
operate the motor on utility power and  
eliminate the SED2 from the motor  
control circuit. The SED2 Electronic  
Bypass Option also allows you to select  
features that enhance the control of the  
contactors and the outputs that report  
operation.  
VFD  
MOTOR  
INPUT  
CONTACTOR  
OUTPUT  
CONTACTOR  
Figure 1. Functional Block Diagram of  
Typical Electronic Bypass Option.  
The SED2 Electronic Bypass  
(E-Bypass) Option consists of a SED2  
VFD, and a bypass enclosure with  
electronic controls (Figure 2). The  
electronic controls include:  
CONTROLLER  
SED2 VFD  
BOARD  
KEYPAD  
(DOOR  
MOUNTED)  
Controller board  
Keypad  
INPUT  
CONTACTOR  
Step-down power transformer  
Contactors:  
STEP-DOWN  
POWER  
TRANSFORMER  
REACTOR  
(OPTIONAL)  
Bypass  
OUTPUT  
CONTACTOR  
BYPASS  
CONTACTOR  
Output  
Input (optional)  
DISCONNECT  
SWITCH  
(OR OPTIONAL  
CIRCUIT BREAKER  
SHOWN)  
Overload (current) relay  
Reactor (optional)  
OVERLOAD  
(CURRENT)  
RELAY  
Disconnect switch (or optional  
circuit breaker)  
Fuses (optional)  
Cable harnesses  
Figure 2. Typical SED2 E-Bypass Components.  
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Siemens Building Technologies, Inc.  
Electronic Bypass Option Overview  
Controller Board  
The Controller board is the foundation of the SED2 Electronic Bypass Option. It  
controls communications to and from the SED2, keypad, isolated digital inputs,  
relay/digital outputs, and contactors (Figure 3).  
SED2 INTERFACE  
Supports two SED2 non-isolated, digital relay  
outputs and three SED2 digital inputs. The  
maximum current draw for a relay output is 2 mA and  
the voltage between the digital output source and return  
lines is 24V. The Controller board provides unregulated,  
J4  
non-isolated 24V to power the SED2 digital inputs.  
CONTROLLER  
BASIC SANITY TEST INDICATOR  
BOARD  
Provides indication of initialization and  
normal operation.  
J3  
J8  
MCU  
KEYPAD INTERFACE  
Supports inputs and outputs from the Electronic  
Bypass Option keypad. The keypad provides  
user interface indicators and push buttons.  
FACTORY USE ONLY  
J2  
J1  
Connector J8 is for factory use only.  
DIGITAL INPUTS  
Supports six isolated digital inputs for customer use.  
The inputs require a contact closure capable of  
providing a low impedance path at currents less  
than 20 mA.  
TRANSFORMER  
DIGITAL RELAY OUTPUTS  
Supports six digital relay outputs for customer use.  
Each relay has a maximum rating of 2A at 120 Vac.  
F1  
J5  
J6  
J7  
OVERRIDE JUMPER  
DIP SWITCHES  
The Controller board DIP switches enable/disable  
CONTACTOR POWER  
CONTROLS  
the Electronic Bypass Option features.  
Not used, factory test selector switch #2;  
leave this switch OFF.  
Not used, factory test selector switch #1;  
leave this switch OFF.  
Interlock selector switch; requires  
SED2 programming.  
Automatic Bypass selector switch;  
requires SED2 programming.  
Essential Services selector switch.  
When the switch is ON the option is enabled;  
when the switch is OFF the option is disabled.  
Figure 3. Controller Board Inputs and Outputs.  
Siemens Building Technologies, Inc.  
5
SED2 VFD Electronic Bypass Option Operating Instructions  
Contactors  
The Controller board provides two or three relay contact circuits controlled by the  
Electronic Bypass Option: bypass, input, and output contactors. Each circuit includes  
a NO relay. Controller board connector J7 enables circuit connections. The relay  
circuits route power to the SED2 and the motor via the contactors. Controlling the  
contactors through the relay circuits is the main function of the Controller board.  
Bypass Contactor – The bypass relay on the Controller board controls the bypass  
contactor. The output and bypass relays are interconnected to 120 Vac Hot. This  
enables a safety circuit that prevents the bypass and output contactors from  
simultaneously being energized.  
Output Contactor – The output relay on the Controller board controls the output  
contactor.  
Input Contactor – The input relay on the Controller board controls the optional input  
contactor.  
Keypad Functions  
Bypass  
VFD  
Bypass  
Hand  
Start  
Input  
On/Off  
Hand  
Start  
Input  
Contactor  
Input  
Contactor  
Bypass  
Bypass  
Contactor  
Contactor  
VFD  
VFD  
Remote  
Start  
Remote  
Start  
Enable  
Overload  
Relay  
Enable  
Overload  
Relay  
Output  
Contactor  
Output  
Contactor  
Motor  
Motor  
VFD Fault  
VFD Fault  
STOP  
RESET  
STOP  
RESET  
Auto Bypass Enabled  
Essential Services  
Auto Bypass Enabled  
Essential Services  
Safety Fault  
Safety Fault  
Overload Fault  
Overload Fault  
Enable Commanded Proofed  
Enable Commanded Proofed  
INTERLOCK START LOGIC  
INTERLOCK START LOGIC  
2-CONTACTOR KEYPAD  
3-CONTACTOR KEYPAD  
Figure 4. E-Bypass Keypad Indicators and Pushbuttons.  
The keypad provides user interface indicators and pushbuttons. The following table  
describes specific pushbutton and indicator functions:  
6
Siemens Building Technologies, Inc.  
Electronic Bypass Option Overview  
Pushbutton/Indicator  
Description  
The Input On/Off pushbutton is supplied with the optional drive input  
contactor. In VFD mode, this switch does nothing. In bypass mode, this  
switch closes/opens the input contactor, switching the SED2 power on/off.  
Input  
On/Off  
Enable  
Enables SED2 operation by closing the input and output contactors.  
Hand  
Start  
Manually enables bypass mode operation by ensuring that the output  
contactor is open and then closing the bypass contactor.  
Activates the bypass mode and operates the bypass contactor according  
to the status of the Remote Start input on the Controller board.  
Remote  
Start  
STOP  
RESET  
Opens the output and bypass contactors, disconnecting the motor.  
VFD Fault  
Safety Fault  
When a VFD Fault is indicated, the VFD Fault indicator lights and the  
VFD Fault Relay output on the Controller Board is triggered.  
Overload Fault  
The Safety Fault indicator lights when either of the Remote Safety inputs  
on the Controller board opens. The motor is prohibited from operating in  
either the VFD or bypass modes while either of these contacts is open.  
VFD Fault  
Safety Fault  
EXCEPTION: Essential Services ignores a Safety Fault.  
Overload Fault  
NOTE: If not using the Remote Safety feature, hard wire the two  
Remote Safety inputs.  
VFD Fault  
Safety Fault  
If the Electronic Bypass Option current overload relay trips, the Overload  
Fault indicator lights and the motor will not run in bypass mode.  
Overload Fault  
When the Auto Bypass DIP switch is enabled, the Auto Bypass Enabled  
indicator is on steady. Bypass operation is automatically initiated by the  
SED2.  
Auto Bypass Enabled  
Essential Services  
When Auto Bypass is active, the Auto Bypass Enabled indicator flashes.  
When the Essential Services DIP switch is enabled, the Essential  
Services indicator is on steady.  
When the Essential Services input is open, normal operation is indicated  
as the output contactor remains closed to keep the motor running and the  
Essential Services indicator is on steady.  
Auto Bypass Enabled  
Essential Services  
When the Essential Services input is closed, the bypass contactor closes  
and the Essential Services indicator flashes.  
Nothing can interrupt the Essential Services mode except for the  
Essential Services input opening.  
Siemens Building Technologies, Inc.  
7
SED2 VFD Electronic Bypass Option Operating Instructions  
Pushbutton/Indicator  
Description  
When the Interlock DIP switch is enabled, the Interlock Start Logic Enable  
indicator is on steady. Any call to start the motor in either VFD or bypass  
modes will not start the motor; instead it will close the Programmable  
Output relay on the Controller board.  
The Programmable Output can be used to actuate another device. When  
this occurs, the Interlock Start Logic Commanded indicator also lights,  
and the Interlock Start Logic Proofed indicator flashes.  
Enable Commanded Proofed  
INTERLOCK START LOGIC  
A contact closure from this other device is wired to the Interlock Start on  
the Controller board which then starts the motor and turns the Interlock  
Start Logic Proofed indicator on steady. This feature is also called  
damper end switch relay logic.  
8
Siemens Building Technologies, Inc.  
Installation Instructions  
Installation Instructions  
Environmental Conditions  
Install the Electronic Bypass Option in a heated, indoor controlled environment that is free of  
moisture and conductive contaminants such as condensation and dust. The air entering the  
unit for ventilation/cooling must be clean and free from corrosive gases.  
The ambient temperature must be between 14°F and 104°F (-10°C to 40°C) and the relative  
humidity must be 0% to 95% noncondensing. Do not mount unit in direct sunlight.  
Mechanical Installation  
Inspection  
1. As you unpack the Electronic Bypass Option, check for shipping damage. In the event of  
damage, contact the transport company.  
2. Locate the Electronic Bypass Option nameplate and confirm that the unit is configured to  
the installation requirements.  
3. Verify the delivery is complete. If not, contact the supplier.  
Dimensions and Weights  
Figure 5 shows overall and mounting dimensions for the Electronic Bypass Option. Figures 6  
through 8 show conduit locations.  
Approximate weights are as follows.  
Bypass  
Weight lb (kg)  
Frame Size  
A
B
C
D
E
F
45 (20)  
55 (25)  
75 (34)  
150 (68)  
180 (82)  
470 (213)  
NOTE: Exact weight will be affected by actual horsepower/voltage and selected power  
options.  
Siemens Building Technologies, Inc.  
9
SED2 VFD Electronic Bypass Option Operating Instructions  
Mounting  
1. To ensure safe installation, verify that the surface of the mounting location is level.  
2. Mount the Electronic Bypass Option vertically with the SED2 operator panel, Electronic  
Bypass Option keypad, and disconnect accessible.  
= Protective Shield  
Depth  
With  
Handle  
10.4 (26)  
20.8  
(53)  
2.9  
(7.4)  
Depth  
With  
Handle  
9.6 (24)  
4
(10)  
11.5  
(29)  
1
(2.5)  
2
(5)  
Depth  
With  
Handle  
9.6 (24)  
13.2  
(34)  
1.5  
(3.8)  
53.5  
(136)  
48  
(122)  
34  
(86)  
11.5 TYP  
(29)  
10.5 TYP  
(27)  
11 TYP  
(28)  
10.6  
(27)  
12.4  
(31)  
19.9  
(51)  
1.5  
(3.8)  
2
(5)  
3.4  
(8.6)  
Frame Size  
A and B  
Frame  
Size C  
Frame  
Size D  
Depth  
20.8  
(53)  
2.9  
(7.4)  
With  
Handle  
12.2 (31)  
Depth  
17.4  
(44)  
3
(7.6)  
45.5  
(116)  
57.5  
58.5  
(146)  
(149)  
10 TYP  
(25)  
19.9  
(51)  
5.5  
(14)  
Frame Size E  
Frame Size F  
NOTE:  
It is recommended to leave 6 inches (15 cm) around the top and sides of the unit.  
Figure 5. E-Bypass Dimensions in Inches (Centimeters).  
10  
Siemens Building Technologies, Inc.  
Installation Instructions  
1/2 (1.3) AND 3/4 (1.9)  
1/2 (1.3) AND 3/4 (1.9)  
CONDUIT KNOCKOUTS  
CONDUIT KNOCKOUTS  
3/4 (1.9) AND 1 (2.5)  
CONDUIT KNOCKOUTS  
1-1/4 (3.2) AND 1-1/2 (3.8)  
CONDUIT KNOCKOUTS (3)  
8
(20.3)  
6
(15.2)  
4
(10.2)  
2-3/4  
(6.9)  
3-5/8  
(9.2)  
8-1/2  
(21.7)  
2-1/8  
(5.3)  
16  
(40.7)  
9-1/2  
(24.1)  
Figure 7. Frame Sizes D and E Conduit Locations.  
Viewed from Bottom;  
Dimensions in Inches (Centimeters).  
Figure 6. Frame Sizes A through C Conduit  
Locations. Viewed from Bottom;  
Dimensions in Inches (Centimeters).  
20-3/8  
(51.7)  
15-3/8  
(39.1)  
13-5/8  
(34.6)  
11-7/8  
(30.1)  
7-3/8  
(18.7)  
4-1/4  
(10.8)  
3/4 (1.9) AND 1 (2.5)  
CONDUIT KNOCKOUTS (3)  
3 (7.6) CONDUIT  
KNOCKOUTS (2)  
Figure 8. Frame Size F Conduit Locations. Viewed from Top; Dimensions in Inches (Centimeters).  
Siemens Building Technologies, Inc.  
11  
SED2 VFD Electronic Bypass Option Operating Instructions  
Electrical Installation  
See Figure 9 for all Electronic Bypass Option wiring.  
1. Route shielded twisted pair (recommended wire type) cable, 24 gauge minimum control  
wiring in conduit through knockout and into housing (Figures 10 through 12). Connect  
control wiring per job-specific drawings.  
NOTES:  
Terminate shield at control device.  
Control wiring is 12 to 26 AWG and tightening torque is 5 lb-in.  
2. If applicable, route communications wiring (P1) in conduit through knockout and into  
housing (Figures 10 through 12). Continue to route communications wiring to SED2 and  
terminate per SED2 VFD Startup, Operation, and Maintenance Manual (125-3201).  
3. Route motor wiring in conduit through knockout and into housing (Figures 10 through 12).  
Connect motor wiring to motor overload and ground lug. See Tables 1 through 4 for wire  
sizes and tightening torques.  
4. Route input power wiring in conduit through knockout and into housing (Figures 10  
through 12). Connect input power wiring to disconnect switch and ground lug or to circuit  
breaker and ground lug. See Tables 1 through 4 for wire sizes and tightening torques.  
12  
Siemens Building Technologies, Inc.  
Installation Instructions  
OPTIONAL SUPPLEMENTARY  
POWER FUSES - MAIN SHORT  
CIRCUIT PROTECTION BY OTHERS  
(SEE NOTE 1)  
DISC1  
L1 1L1  
(T1) (L1)  
L2 1L2  
FU1  
M1  
2L1  
2L2  
2L3  
(5) (6)  
(3) (4)  
(1) (2)  
POWER  
SUPPLY  
3 PHASE (T2) (L2)  
60 Hz  
L3  
1L3  
(T3) (L3)  
GND  
OPTIONAL  
OPTIONAL  
OPTIONAL  
OUTPUT LOAD  
REACTOR  
DRIVE INPUT INPUT LINE  
CONTACTOR REACTOR  
VFD  
GND  
LUG  
GND  
M3  
M2  
OL1  
3L1  
R
S
T
U1  
V1  
U
1T1  
L1  
U
V
(1) (2)  
(2) (1)  
(T1)  
A1  
B1  
C1  
A2  
B2  
C2  
A1  
B1  
C1  
A2  
B2  
C2  
AC MOTOR  
(CUSTOMER  
SUPPLIED)  
3L2  
3L3  
V
1T2  
(T2)  
L2  
L3  
M
(3) (4)  
(5) (6)  
(4) (3)  
(6) (5)  
W1  
W
1T3  
(T3)  
W
GND  
GND  
LUG  
1L1 1L2  
TO  
STEP-DOWN  
CONTROL  
TRANSFORMER  
NOTES:  
1. Branch circuit protection to be provided by installer, per UL508A, if not provided with drive.  
2. For bypass operation, modify these drive parameters: P0702[0] and P0702[1] = 3,  
P0748 = Digital Out 1 Reverse (  
).  
3. Control and communication wiring should be 300V UL minimum.  
4. Communication wiring should be run with maximum separation possible from all other  
wiring.  
5. Essential service mode operates the motor full speed (bypass) with no protection for the  
motor or system.  
6. Ensure that automatic bypass will not damage the system before activating.  
7. See Table 8 for proper fuse and wire sizes.  
8. See Siemens Publication No. 125-3201 for SED2 input/output control signal wiring details.  
Figure 9. E-Bypass Power Circuit.  
Siemens Building Technologies, Inc.  
13  
SED2 VFD Electronic Bypass Option Operating Instructions  
SED2 VFD  
SED2 VFD  
CONTROLLER  
BOARD  
COMMUNICATIONS  
WIRING (P1) VIA  
1 KNOCKOUT  
CONTROLLER  
BOARD  
COMMUNICATIONS  
WIRING (P1) VIA  
1 KNOCKOUT  
INPUT  
CONTACTOR  
(OPTIONAL)  
INPUT  
CONTACTOR  
J2  
(OPTIONAL)  
J2  
J1  
CONTROL WIRING  
(DIGITAL INPUTS/  
OUTPUTS) VIA  
2 KNOCKOUTS  
CONTROL WIRING  
(DIGITAL INPUTS/  
OUTPUTS) VIA  
J1  
REACTOR  
(OPTIONAL)  
REACTOR  
2 KNOCKOUTS  
(OPTIONAL)  
TRANSFORMER  
TRANSFORMER  
POWER FUSES  
(OPTIONAL)  
POWER FUSES  
(OPTIONAL)  
OUTPUT  
CONTACTOR  
OUTPUT  
CONTACTOR  
GROUND LUGS  
GROUND LUGS  
BYPASS  
CONTACTOR  
BYPASS  
CONTACTOR  
DISCONNECT  
SWITCH  
(OR OPTIONAL  
CIRCUIT BREAKER)  
DISCONNECT  
SWITCH  
(OR OPTIONAL  
CIRCUIT BREAKER)  
L1 L2 L3  
T1 T2 T3  
T1T2T3  
L1 L2 L3  
MOTOR  
MOTOR  
OVERLOAD  
OVERLOAD  
MOTOR  
WIRING  
VIA  
MOTOR  
WIRING  
VIA  
INPUT  
POWER  
WIRING VIA  
KNOCKOUT  
INPUT  
POWER  
WIRING VIA  
KNOCKOUT  
KNOCKOUT  
KNOCKOUT  
Figure 10. Routing of Power and Control Wiring  
for Frame Sizes A and B.  
Figure 11. Routing of Power and Control  
Wiring for Frame Sizes C, D, and E.  
GROUND  
LUGS (2)  
MOTOR  
WIRING VIA  
KNOCKOUT  
INPUT POWER  
WIRING VIA  
KNOCKOUT  
SED2  
VFD  
DISCONNECT SWITCH  
(OR OPTIONAL  
CIRCUIT BREAKER)  
T3T2T1  
L3 L2 L1  
MOTOR  
OVERLOAD  
BYPASS  
CONTACTOR  
OUTPUT  
CONTACTOR  
J2  
J1  
CONTROLLER  
BOARD  
TRANSFORMER  
INPUT  
CONTACTOR  
(OPTIONAL)  
COMMUNICATIONS  
WIRING (P1) VIA  
1 KNOCKOUT  
POWER FUSES  
(OPTIONAL)  
REACTOR  
(OPTIONAL)  
Figure 12. Routing of Power and Control Wiring for Frame Size F.  
14  
Siemens Building Technologies, Inc.  
Installation Instructions  
Table 1. Wire Sizes and Tightening Torques for E-Bypass with 208V Drive.  
Disconnect  
Switch  
Circuit Breaker  
Overload  
Ground Lug  
Torque,  
Bypass  
Frame HP kW Amps  
Size  
Part  
Number  
Max  
Torque,  
Wire  
Torque,  
Torque,  
lb-in  
Wire  
Size *  
Wire  
Size *  
Range, Backup Wire  
Amps  
lb-in  
(Nm)  
lb-in  
(Nm)  
lb-in  
(Nm)  
Size *  
Fuse, Size *  
Amps  
(Nm)  
14-10  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
VBE10.5----  
VBE10.7----  
VBE11.0----  
VBE11.5----  
VBE12.0----  
VBE13.0----  
VBE15.0----  
VBE17.5----  
VBE110.----  
VBE115.----  
VBE120.----  
VBE125.----  
VBE130.----  
A
A
A
B
B
B
C
C
C
D
D
D
E
0.5 0.37  
0.7 0.55  
1.0 0.75  
1.5 1.1  
2.0 1.5  
3.0 2.2  
5.0 4.0  
7.5 5.5  
2.3  
3.0  
3.9  
5.5  
7.4  
10.4  
16.7  
22.0  
28  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
14-10  
14-10  
18-3  
1.8 - 2.5  
2.2 - 3.2  
2.8 - 4  
10  
12  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
Cu  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
16  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
4.5 - 6.3  
5.5 - 8.0  
7 - 10  
25  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
30  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
40  
14-10  
Cu  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 25)  
32 (3.6)  
14-8  
14-8  
14-8  
14-6  
12-1  
12-1  
12-1  
14 - 20  
20 - 25  
22 - 32  
40 - 50  
45 - 63  
57 - 75  
70 - 90  
80  
14-10  
Cu  
20 - 60  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 25)  
100  
125  
200  
250  
300  
350  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
17 - 22  
(1.9 - 2.5)  
27 - 40  
(3.1 - 4.5)  
10  
7.5  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
15 11.0  
20 15.0  
25 18.5  
30 22.0  
42  
18-3  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
54  
10-1/0  
10-1/0  
10-1/0  
(2.2 - 6.8)  
3-3/0-3  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
68  
80 (9)  
80 (9)  
3-3/0-3  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
80  
6 - 350  
kcmil  
120 - 275  
(14 - 31.1)  
22 - 27  
(2.5 - 3.1)  
124 - 210  
(14 - 23.7)  
VBE140.----  
VBE150.----  
VBE160.----  
F
F
F
40 30.0  
50 37.0  
60 45.0  
104  
130  
154  
12-1  
6-3/0  
6-3/0  
6-3/0  
50 - 200  
50 - 200  
50 - 200  
800  
800  
800  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
Cu  
6 - 350  
kcmil  
120 - 275  
(13.5 - 31.1)  
120 - 275 6 - 350  
(14 - 31.1) kcmil  
124 - 210  
(14 - 23.7)  
Cu  
6 - 350  
kcmil  
120 - 275  
(13.5 - 31.1)  
120 - 275 6 - 350  
(14 - 31.1) kcmil  
124 - 210  
(14 - 23.7)  
Cu  
* Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum  
600 Vac.  
Siemens Building Technologies, Inc.  
15  
SED2 VFD Electronic Bypass Option Operating Instructions  
Table 2. Wire Sizes and Tightening Torques for E-Bypass with 230V to 240V Drive.  
Disconnect  
Circuit Breaker  
Overload  
Ground Lug  
Torque,  
Switch  
Bypass  
Part  
Number  
Max  
Frame HP kW Amps  
Size  
Torque,  
Wire  
Torque,  
lb-in  
(Nm)  
Torque,  
lb-in  
(Nm)  
Wire  
Size *  
Wire  
Size *  
Range, Backup Wire  
lb-in  
lb-in  
(Nm)  
Size *  
Amps  
Fuse, Size *  
Amps  
(Nm)  
14-10  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
VBE20.5----  
VBE20.7----  
VBE21.0----  
VBE21.5----  
VBE22.0----  
VBE23.0----  
VBE25.0----  
VBE27.5----  
VBE210----  
VBE215----  
VBE220----  
VBE225----  
VBE230----  
A
A
A
B
B
B
C
C
C
D
D
D
E
0.5 0.37  
0.7 0.55  
1.0 0.75  
1.5 1.1  
2.0 1.5  
3.0 2.2  
5.0 4.0  
7.5 5.5  
2.2  
3.0  
3.9  
5.5  
6.8  
9.6  
15.2  
22  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
14-10  
14-10  
18-3  
1.8 - 2.5  
2.2 - 3.2  
2.8 - 4  
10  
12  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
Cu  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
16  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
4.5 - 6.3  
5.5 - 8.0  
7 - 10  
25  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
30  
14-10  
Cu  
13 -  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
40  
14-10  
Cu  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 25)  
32 (3.6)  
14-8  
14-8  
14-8  
14-6  
12-1  
12-1  
12-1  
14 - 20  
20 - 25  
22 - 32  
40 - 50  
45 - 63  
57 - 75  
70 - 90  
80  
14-10  
Cu  
17 - 22  
(1.9 - 2.5)  
20 - 60  
18 - 22  
(2 - 25)  
100  
125  
200  
250  
300  
350  
(2.2 - 6.8)  
10-1/0  
Cu  
17 - 22  
(1.9 - 2.5)  
20 - 60  
27 - 40  
(3.1 - 4.5)  
10  
7.5  
28  
(2.2 - 6.8)  
10-1/0  
Cu  
22 - 27  
(2.5 - 3.1)  
20 - 60  
27 - 40  
(3.1 - 4.5)  
15 11.0  
20 15.0  
25 18.5  
30 22.0  
42  
18-3  
(2.2 - 6.8)  
10-1/0  
Cu  
22 - 27  
(2.5 - 3.1)  
20 - 60  
36 - 53  
(4.1 - 6)  
54  
10-1/0  
10-1/0  
10-1/0  
(2.2 - 6.8)  
3-3/0-3  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
68  
80 (9)  
80 (9)  
3-3/0-3  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
80  
6 - 350  
kcmil  
22 - 27  
(2.5 - 3.1)  
120 - 275  
(14 - 31.1)  
124 - 210  
(14 - 23.7)  
VBE240----  
VBE250----  
VBE260----  
F
F
F
40 30.0  
50 37.0  
60 45.0  
104  
130  
154  
12-1  
6-3/0  
6-3/0  
6-3/0  
50 - 200  
50 - 200  
50 - 200  
800  
800  
800  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
Cu  
6 - 350  
kcmil  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (13.5 - 31.1)  
124 - 210  
(14 - 23.7)  
Cu  
6 - 350  
kcmil  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (13.5 - 31.1)  
124 - 210  
(14 - 23.7)  
Cu  
* Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum  
600 Vac.  
16  
Siemens Building Technologies, Inc.  
Installation Instructions  
Table 3. Wire Sizes and Tightening Torques for E-Bypass with 380V to 480V Drive.  
Disconnect  
Switch  
Circuit Breaker  
Overload  
Ground Lug  
Torque,  
Bypass  
Frame HP kW Amps  
Size  
Part  
Number  
Max  
Torque,  
Wire  
Torque,  
Torque,  
lb-in  
Wire  
Size *  
Wire  
Size *  
Range, Backup Wire  
Amps  
lb-in  
(Nm)  
lb-in  
(Nm)  
lb-in  
(Nm)  
Size *  
Fuse, Size*  
Amps  
(Nm)  
14-10  
.7 - 1.0  
1.1 - 1.6  
1.4 - 2.0  
2.2 - 3.2  
2.8 - 4  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
VBE30.5----  
VBE30.7----  
VBE31.0----  
VBE31.5----  
VBE32.0----  
VBE33.0----  
VBE35.0----  
VBE37.5----  
VBE310----  
VBE315----  
A
A
A
A
A
B
B
C
C
C
0.5 0.37  
0.7 0.55  
1.0 0.75  
1.5 1.1  
2.0 1.5  
3.0 2.2  
5.0 4.0  
7.5 5.5  
1.1  
1.6  
2.1  
3.0  
3.4  
4.8  
7.6  
11  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
14-10  
14-10  
4
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
Cu  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
6
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
8
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
12  
16  
20  
40  
45  
60  
80  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
14-10  
Cu  
3.5 - 5  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
14-10  
Cu  
7 - 10  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(.8 - 1.2)  
14-10  
Cu  
9 - 12  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
14-10  
Cu  
11 - 16  
17 - 22  
13 to17  
(1.5 - 1.7)  
18 - 22  
(2 - 2.5)  
10  
7.5  
14  
14-10  
Cu  
20 - 60  
14-8  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 2.5)  
15 11.0  
21  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
14-8  
17 - 22  
(1.9 - 2.5)  
27 - 40  
(3.1 - 4.5)  
22 - 32  
28 - 40  
28 - 40  
40 - 50  
57 - 75  
70 - 90  
VBE320----  
VBE325----  
VBE330----  
VBE340----  
VBE350----  
VBE360----  
C
D
D
D
E
E
20 15.0  
25 18.5  
30 22.0  
40 30.0  
50 37.0  
60 45.0  
27  
34  
40  
52  
65  
77  
18-3  
18-3  
125  
150  
150  
200  
300  
350  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
14-6  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
14-6  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
18-3  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
14-6  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
18-3  
(2.2 - 6.8)  
10-1/0  
Cu  
20 - 60  
12-1  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
10-1/0  
10-1/0  
(2.2 - 6.8)  
3-3/0  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
80 (9)  
80 (9)  
12-1  
12-1  
3-3/0  
Cu  
80 - 100  
50 - 200  
50 - 200  
50 - 200  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
VBE375----  
F
F
75 55.0  
100 75.0  
96  
10-1/0  
6-3/0  
400  
800  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
6 - 350  
kcmil  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (13.5 - 31.1)  
124 - 210  
(14 - 23.7)  
VBE3100----  
124  
Cu  
6 - 350  
kcmil  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (13.5 - 31.1)  
124 - 210  
(14 - 23.7)  
VBE3125----  
F
F
125 90.0  
156  
178  
6-3/0  
6-3/0  
800  
800  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
Cu  
6 - 350  
kcmil  
VBE3125--  
HA  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (13.5 - 31.1)  
124 - 210  
(14 - 23.7)  
90.0  
Cu  
* Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum  
600 Vac.  
Siemens Building Technologies, Inc.  
17  
SED2 VFD Electronic Bypass Option Operating Instructions  
Table 4. Wire Sizes and Tightening Torques for E-Bypass with 500V to 600V Drive.  
Disconnect  
Circuit Breaker  
Overload  
Ground Lug  
Torque,  
Switch  
Bypass  
Part  
Number  
Max  
Frame HP kW Amps  
Size  
Torque,  
Wire  
Torque,  
lb-in  
(Nm)  
Torque,  
lb-in  
(Nm)  
Wire  
Size *  
Wire  
Size *  
Range, Backup Wire  
lb-in  
lb-in  
(Nm)  
Size *  
Amps  
Fuse, Size*  
Amps  
(Nm)  
14-10  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
VBE40.5----  
VBE40.7----  
VBE41.0----  
VBE41.5----  
VBE42.0----  
VBE43.0----  
VBE45.0----  
VBE47.5----  
VBE410.----  
VBE415.----  
VBE420.----  
VBE425.----  
VBE430.----  
VBE440.----  
VBE450.----  
VBE460.----  
VBE475.----  
VBE4100----  
C
C
C
C
C
C
C
C
C
C
C
C
D
D
E
E
F
0.5 0.37  
0.7 0.55  
1.0 0.75  
1.5 1.1  
2.0 1.5  
3.0 2.2  
5.0 4.0  
7.5 5.5  
.9  
1.3  
1.4  
2.1  
2.7  
3.9  
6.1  
9
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
32 (3.6) 18-10  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
18-14  
14-10  
14-10  
18-3  
.7 - 1.0  
.9 - 1.25  
1.1 - 1.6  
1.8 - 2.5  
2.2 - 3.2  
2.8 - 4  
4
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
14-2  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
35 (4)  
Cu  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
5
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
6
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
10  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
12  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
16  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
4.5 - 6.3  
7 - 10  
25  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
40  
14-10  
Cu  
13 - 17  
(1.5 - 1.7)  
7 - 10.3  
(8 - 1.2)  
10  
7.5  
11  
17  
22  
27  
32  
41  
52  
62  
77  
99  
9 - 2  
45  
14-10  
Cu  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 2.5)  
15 11.0  
20 15.0  
25 18.5  
30 22.0  
40 30.0  
50 37.0  
60 45.0  
75 55.0  
100 75.0  
32 (3.6)  
14-8  
14-8  
14-6  
14-6  
14-6  
14-6  
12-1  
12-1  
12-1  
14 - 20  
17 - 22  
22 - 32  
28 - 40  
36 - 45  
40 - 50  
45 - 63  
70 - 90  
80 - 100  
80  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
17 - 22  
(1.9 - 2.5)  
18 - 22  
(2 - 2.5)  
80  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
125  
150  
175  
200  
250  
350  
400  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
18-3  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
18-3  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
22 - 27  
(2.5 - 3.1)  
27 - 40  
(3.1 - 4.5)  
18-3  
10-1/0  
Cu  
20 - 60  
(2.2 - 6.8)  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
10-1/0  
10-1/0  
10-1/0  
3-3/0  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
80 (9)  
80 (9)  
14-2/0 50 (5.6)  
14-2/0 50 (5.6)  
3-3/0  
Cu  
22 - 27  
(2.5 - 3.1)  
36 - 53  
(4.1 - 6)  
F
6 - 350  
kcmil  
120 - 275 6 - 350 120 - 275  
(14 - 31.1) kcmil (14 - 31.1)  
124 - 210  
(14 - 23.7)  
VBE4125----  
F
125 90.0  
125  
10-1/0  
50 - 200  
800  
14-2/0 50 (5.6)  
Cu  
* Wire size is AWG unless noted otherwise. Use Copper (Cu) wire that is rated 167°F (75°C) minimum  
600 Vac.  
18  
Siemens Building Technologies, Inc.  
Startup Procedures  
Startup Procedures  
Safety Precautions  
WARNING:  
When you connect input power to the Electronic Bypass Option, the motor terminals  
are energized even if the motor is not running. Do not make any connections with  
input power connected to the Electronic Bypass Option. Disconnect and lock out  
power to the drive before servicing it. Failure to disconnect input power may cause  
serious injury or death.  
CAUTION:  
After you disconnect input power, the DC bus capacitors must be allowed to  
discharge to a safe voltage. This will take about 5 minutes.  
Installation Inspection  
Inspect the mechanical and electrical installation for compliance with local electrical  
codes and regulations. After installation, verify that:  
Electronic Bypass Option and motor are properly grounded.  
Input power and motor wire sizes are correct and connections are secure.  
Control wiring is correct, connections are secure, and wire shield is properly  
grounded.  
Control wiring is not routed with power wiring.  
Electronic Bypass Option has proper ventilation.  
Internal Bypass connections are secure.  
Power-On  
1. Turn on Electronic Bypass Option power.  
Power-on initialization performs a basic sanity test (approximately 7 seconds) to  
initialize the Controller board. Also, the Stop/Reset indicator will flash.  
A unit fault condition occurs if the Electronic Bypass Option did not pass the  
basic sanity test. See the Troubleshooting section in this manual for more details.  
Siemens Building Technologies, Inc.  
19  
SED2 VFD Electronic Bypass Option Operating Instructions  
After the basic sanity test, if the DIP switches have not changed and there is no  
operator intervention, the most recent bypass function is restored. If the DIP  
switches have changed, the Electronic Bypass Option activates the Stop/Reset  
function.  
2. Press the Enable key on the Electronic Bypass Option keypad to place the unit  
in VFD mode.  
3. Perform SED2 commissioning per the SED2 VFD Startup, Operation, and  
Maintenance Manual (125-3201). If using the Quick Commissioning mode, end  
this mode with P3900 = 3 to run a motor calculation without resetting the SED2 to  
factory defaults.  
4. After basic SED2 operation is established and verified, turn SED2 power off via  
the Electronic Bypass Option input power device and verify that no dangerous  
voltages are present in the enclosure.  
5. Select Electronic Bypass Option application features using the DIP switches.  
DIP Switch Settings for E-Bypass Features.  
Switch  
Description  
Position  
1
2
3
4
5
Essential Services selector switch.  
Automatic Bypass selector switch; requires SED2 programming.  
Interlock selector switch; requires SED2 programming.  
Factory test #1 selector switch. Not used; leave this switch OFF.  
Factory test #2 selector switch. Not used; leave this switch OFF.  
NOTE: When the switch is ON, the feature is enabled; when the switch is  
OFF, the feature is disabled. For details on the Electronic Bypass  
Option features, see the Application Feature Setup section in this  
manual.  
6. Re-apply power to the Electronic Bypass Option. On units with three contactors,  
energize the SED2 by pressing the Input pushbutton on the Electronic Bypass  
Option keypad.  
7. Program the SED2 per the Application Feature Setup section in this manual.  
8. Test all SED2 and bypass features.  
20  
Siemens Building Technologies, Inc.  
Startup Procedures  
9. If motor rotation is incorrect in either VFD, bypass, or both modes, have the  
appropriate site personnel take corrective action as follows:  
Wrong Rotation in Bypass, Right in VFD Mode – Swap two input  
leads on the main input device of the Electronic Bypass Option.  
Wrong Rotation in VFD, Right in Bypass Mode – Swap two input  
leads on the main input device of the Electronic Bypass Option and swap  
two motor leads at the motor overload in the Electronic Bypass Option.  
Wrong Rotation in both VFD and Bypass Modes – Swap two motor  
leads at the motor overload in the Electronic Bypass Option.  
Quick Commissioning  
Parameter P0010 is the Commissioning Parameter Filter. It allows you to select a  
group of parameters that can be used for quick commissioning, including motor data,  
and motor ramp-up and ramp-down settings.  
It is important to use parameter P0010 to commission the SED2, parameter P0003 to  
select the access level for using parameters, and parameter P0004 to filter the  
parameters according to their functionality. When Commissioning Parameter Filter  
P0010 = 1, it initiates the quick commissioning procedure.  
It is recommended that you use the quick commissioning procedure. However,  
experienced users may commission the equipment without the P0004 filter functions.  
At the end of the quick commissioning procedure, set parameter P3900 = 3. This  
setting performs the necessary motor calculations and sets all remaining parameters  
(those not included in P0010 = 1) to the factory default values. If 3900 is set to a  
value greater than 0, P0010 is automatically reset to 0. (If P0010 = 1, the SED2  
cannot start.) The process of performing motor calculations and setting all  
parameters to factory default values is only possible via quick commissioning.  
Siemens Building Technologies, Inc.  
21  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P0003  
User Access Level  
Setting = 3  
Default = 1  
1. Press  
to access parameter  
Allows you to access more  
parameters.  
r0000 and to enter the SED2  
parameter mode.  
1 = Standard  
2 = Extended  
3 = Expert  
2. Press  
to advance to  
parameter P0003.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to 3  
(expert level).  
5. Press  
to confirm and save  
the P0003 = 3 setting.  
NOTE:  
Before starting quick commissioning, set P0003 = 3 to ensure all necessary parameters are available  
during quick commissioning.  
P0010  
Quick Commissioning  
0 = Ready to Run  
Setting = 1  
Default = 0  
1. Press  
to access parameter  
r0000 and to enter the SED2  
parameter mode.  
1 = Quick Commissioning  
30 = Factory Setting  
2. Repeatedly press  
to  
advance to parameter P0010.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to 1.  
5. Press  
to confirm and save  
the P0010 = 1 setting.  
NOTES:  
1. P0010 must always be set back to 0 before operating the motor.  
2. If P3900 is greater than 0 on completion of commissioning, P0010 is automatically set back to 0.  
22  
Siemens Building Technologies, Inc.  
Startup Procedures  
Setting/  
Default  
Parameter  
Description  
Action  
P0100  
Operation for Europe/N.  
America  
Setting = 1  
1. Press  
to advance to  
parameter P0100.  
Default = 0 or  
1
0 = 50 Hz, kW (Europe)  
factory default  
2
Press  
to access the  
(Default is  
parameter values level.  
1 = 60 Hz, hp  
determined by  
the setting of  
the motor  
frequency and  
unit of  
(North America)  
3. Press  
4. Press  
to advance to 1.  
2 = 60 Hz, kW  
(North America)  
to confirm and save  
measurement  
DIP switches.)  
the P0100 = 1 setting.  
The setting of Motor Frequency  
and Unit of Measurement DIP  
switch 2 overrides P0100  
settings 0 and 1.  
NOTES:  
1. Stop the SED2 (that is, disable all pulses) before changing this parameter.  
2. Changing P0100 resets all rated motor parameters as well as other parameters that depend on the  
rated motor parameters (such as P0340, Calculation of motor Parameters).  
P0304*  
Rated Motor Voltage  
Setting =  
Motor  
nameplate  
1. Press  
to advance to  
parameter P0304.  
10V to 2000V.  
Default =  
Varies by  
model  
Rated motor voltage (V) from  
motor nameplate.  
2. Press  
to access the  
parameter values level.  
3. Press  
to advance to  
nominal voltage.  
4. Press  
to confirm and save  
the setting.  
* Motor related parameters.  
Siemens Building Technologies, Inc.  
23  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P0305*  
Rated Motor Current  
Setting =  
Motor  
nameplate  
1. Press  
2. Press  
to advance to  
parameter P0305.  
0A to 10,000A.  
Default =  
Varies by  
model  
Rated motor current (A) from  
motor nameplate.  
to access the  
parameter values level.  
3. Press  
to advance to  
nominal current.  
4. Press  
to confirm and save  
to advance to  
the setting.  
P0307*  
Rated Motor Power  
Setting =  
Motor  
1. Press  
2. Press  
parameter P0307.  
nameplate  
0 kW or hp to 200 kW or hp.  
Default =  
Varies by  
model  
Rated motor power (kW or hp)  
from motor nameplate.  
to access the  
parameter values level.  
(hp/voltage  
dependent)  
If P0100 =1 (60 Hz, hp, North  
America), then motor power is in  
hp.  
3. Press  
to advance to  
nominal power.  
4. Press  
to confirm and save  
the setting.  
P0308*, or  
P0309  
Rated Motor cosPhi (P308), or  
Rated Motor Efficiency (P0309)  
Setting =  
Motor  
nameplate  
1. Press  
to advance to  
parameter P0308 or P0309.  
0.000 to 1.00 (P0308) or 0.0 to  
99.9 (P0309)  
P0308 Default  
= 0.00  
2
Press  
to access the  
parameter values level.  
Rated motor cosPhi or motor  
efficiency from motor nameplate.  
P0309 Default  
=
Varies by  
model  
(hp/voltage  
dependent)  
3. Press  
to advance to  
nominal cosPhi or motor  
efficiency.  
If P0100 = 2 and P0307 = kW,  
P0308 displays.  
If P0100 = 1 and P0307 = hp,  
P0309 displays.  
4. Press  
to confirm and save  
the setting.  
P0309 = 100% corresponds to  
super conducting.  
NOTE:  
This parameter is available when  
P0003 = 3 and P0010 = 1.  
* Motor related parameters.  
24  
Siemens Building Technologies, Inc.  
Startup Procedures  
Setting/  
Default  
Parameter  
Description  
Action  
P0310*  
Rated Motor Frequency  
Setting =  
Motor  
nameplate 60  
Hz  
1. Press  
2. Press  
to advance to  
parameter P0310.  
12 Hz to 650 Hz  
Rated motor frequency (Hz) from  
motor nameplate.  
to access the  
Default =  
50 Hz/60 Hz  
parameter values level.  
Pole pair number is recalculated  
automatically if the parameter is  
changed.  
Default is  
3. Press  
to advance to  
dependent on  
the setting of  
the motor  
nominal frequency (60 Hz).  
frequency and  
unit of  
4. Press  
to confirm and save  
the setting.  
measurement  
DIP switches.  
P0311*  
Rated Motor Speed  
Setting =  
Motor  
nameplate  
1. Press  
to advance to  
parameter P0311.  
0 to 40,000 1/min  
Default =  
Varies by  
model  
Rated motor speed (rpm) from  
motor nameplate.  
2. Press  
to access the  
parameter values level.  
A setting of 0 causes an internal  
calculation of this value.  
3
Press  
to advance to  
nominal motor speed.  
Vector control and V/f control  
with speed controller require this  
value.  
4. Press  
to confirm and save  
the setting.  
Slip compensation in V/f control  
requires this value for correct  
operation.  
Pole pair number is recalculated  
automatically if the parameter is  
changed.  
* Motor related parameters.  
Siemens Building Technologies, Inc.  
25  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P0640  
Motor Overload Factor  
Setting =  
As applicable  
1. Press  
2. Press  
to advance to  
parameter P0640.  
10% to 400%  
Default = 110  
Limited to the maximum SED2  
output current rating, or to 400%  
of the rated current (P0305),  
whichever is lower.  
to access the  
parameter values level.  
3. Press  
to advance to  
NOTE:  
desired value.  
This parameter is available when  
P0003 = 3 and  
P0010 = 1.  
4. Press  
to confirm and save  
the setting.  
P0700(0)**  
Selection of Command Source  
(Start Command)  
Setting = 2  
Default = 2  
1. Press  
2. Press  
to advance to  
parameter P0700.  
Selects the command source as  
follows:  
to access the  
parameter indexes.  
0 = Factory default setting  
1 = BOP (keypad)  
3. Press  
to advance to index  
[0], IN000, AUTO.  
2 = Terminal digital input  
4 = USS on BOP link (AOP)  
5 = USS on COM link  
4. Press  
to confirm index  
selection.  
5. Press  
to advance to 2.  
6 = CB (Communications board  
or module) on COM link (P1/N2)  
6. Press  
to confirm and save  
the setting.  
NOTE:  
Changing this parameter resets (to default) all settings on the selected item. For example, changing from 1  
to 2 resets all digital inputs to default settings.  
** Parameters have two index settings: IN000 = Auto and IN001 = Hand.  
26  
Siemens Building Technologies, Inc.  
Startup Procedures  
Setting/  
Default  
Parameter  
Description  
Action  
P0700[1]**  
Selection of Command Source  
(Start Command)  
Setting = 1  
1. Press  
2. Press  
to advance to index  
[1], IN001, HAND.  
Default = 1  
Selects the command source as  
follows:  
to confirm index  
selection.  
0 = Factory default setting  
1 = BOP (keypad)  
3. Press  
to advance to 1.  
2 = Terminal digital input  
4 = USS on BOP link (AOP)  
5 = USS on COM link  
4. Press  
to confirm and save  
the setting.  
5. Press  
again to return to the  
parameter selection level.  
6 = CB (Communications board  
or module) on COM link (P1/N2)  
NOTE:  
Changing this parameter resets (to default) all settings on the selected item. For example, changing from 1  
to 2 resets all digital inputs to default settings.  
P1000[0]**  
Selection of Frequency  
Setpoint  
Setting = 2  
Default = 2  
1. Press  
to advance to  
parameter P1000.  
(Speed Command Source)  
2. Press  
to access the  
Selects the frequency setpoint  
source as follows:  
parameter indexes.  
3. Press  
to advance to index  
1 = Motor potentiometer  
setpoint/BOP (keypad)  
[0], IN000, AUTO.  
2 = Analog input  
4
Press  
to confirm index  
selection.  
3 = Fixed frequency setpoint  
4 = USS on BOP Link/AOP  
5 = USS on COM link  
5. Press  
to advance to 2.  
6. Press  
to confirm and save  
the setting.  
6 = CB (Communications board  
or module) on COM link (P1/N2)  
** Parameters have two index settings: IN000 = Auto and IN001 = Hand.  
Siemens Building Technologies, Inc.  
27  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P1000[1]**  
Selection of Frequency  
Setpoint  
Setting = 1  
1. Press  
2. Press  
to advance to index  
[1], IN001, HAND.  
Default = 1  
(Speed Command Source)  
to confirm index  
Selects the frequency setpoint  
source as follows:  
selection.  
3. Press  
to advance to 1.  
1 = Motor potentiometer  
setpoint/AOP  
4. Press  
to confirm and save  
2 = Analog input  
the setting.  
3 = Fixed frequency  
4 = USS on BOP Link/AOP  
5 = USS on COM link  
5. Press  
again to return to the  
parameter selection level.  
6 = CB (Communications board  
or module) on COM link (P1/N2)  
P1080  
Minimum Motor Frequency  
Site Setting  
1. Press  
to advance to  
to access the  
parameter P1080.  
0 Hz to 650 Hz  
(20% to 30%  
Max)  
Minimum motor frequency at  
which the motor will run  
irrespective of the frequency  
setpoint. This value applies to  
both clockwise and  
2. Press  
Default = 10  
parameter values level.  
3. Press  
to advance to  
counterclockwise rotation.  
desired value.  
4. Press  
to confirm and save  
the setting.  
** Parameters have two index settings: IN000 = Auto and IN001 = Hand.  
28  
Siemens Building Technologies, Inc.  
Startup Procedures  
Setting/  
Default  
Parameter  
Description  
Action  
P1082  
Maximum Motor Frequency  
Site Setting  
1. Press  
2. Press  
to advance to  
parameter P1082.  
0 Hz to 650 Hz  
Default = 50 or  
60  
Maximum motor frequency at  
which the motor will run  
regardless of the frequency  
setpoint. This value applies to  
both clockwise and  
to access the  
(Default is  
determined by  
the setting of  
the motor  
frequency and  
unit of  
parameter values level.  
3. Press  
to advance it desired  
counterclockwise rotation.  
value.  
measurement  
DIP switches.)  
4. Press  
to confirm and save  
the setting.  
NOTE:  
This value is limited internally to 200 Hz or five times the rated motor frequency (P0305). When P1300 is  
greater than or equal to 20 (control mode = vector control), the value displays via r0209 (maximum  
frequency).  
P1120  
Ramp-up Time  
Site Setting  
Default = 10  
1. Press  
to advance to  
parameter P1120.  
0s to 650s  
Typical fan =  
120s  
2. Press  
to access the  
parameter values level.  
Typical pump =  
3. Press  
to advance it desired 30s  
value.  
4. Press  
to confirm and save  
the setting.  
NOTES:  
1. Setting the ramp-up time too short can cause the SED2 to trip (F0001 over current, F0002 over voltage,  
or F0003 under voltage).  
2. If using an external frequency setpoint with set ramp rates (such as from a PLC), achieve optimum  
SED2 performance by setting ramp time (P1120 and P1121) slightly shorter than those of the PLC.  
Siemens Building Technologies, Inc.  
29  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P1121  
Ramp-down time  
0s to 650s  
Site Setting  
1. Press  
2. Press  
to advance to  
parameter P1121.  
Default = 30  
Typical fan =  
120s  
to access the  
parameter values level.  
Typical pump =  
30s  
3. Press  
to advance it desired  
value.  
4. Press  
to confirm and save  
the setting.  
NOTES:  
1. Setting the ramp-up time too short can cause the SED2 to trip (F0001 over current, F0002 over voltage,  
or F0003 under voltage.  
2. If using an external frequency setpoint with set ramp rates (such as from a PLC), achieve optimum  
SED2 performance by setting ramp times (P1120 and P1121) slightly shorter than those of the PLC.  
P3900  
End Quick Commissioning  
Setting = 1  
Default = 0  
1. Press  
to advance to  
parameter P3900.  
0 = End without motor calculation  
or factory reset.  
2. Press  
to access the  
1 = End with motor calculation  
and factory reset (recommended  
on SED2 without bypass option).  
parameter values level.  
3. Press  
to advance to 1.  
to confirm the  
2 = End with motor calculation  
and with I/O reset.  
4. Press  
setting.  
3 = End with motor calculation  
but without I/O reset  
(recommended with SED2 with  
bypass option).  
NOTES:  
1. P0010 must always be set back to 0 before operating the motor.  
2. If P3900 is greater than 0 on completion of commissioning, P0010 is automatically set back to 0.  
3. If P0700 either indeed was changed during this process, programming of P0704 = 3 is required.  
30  
Siemens Building Technologies, Inc.  
Startup Procedures  
Additional Parameter Settings  
NOTE: If Display Selection for r0000, parameter P0005 = 21 (actual frequency), then the BOP  
display alternately shows setpoint values and the actual value (0 Hz).  
Flying Start  
Setting/  
Default  
Parameter  
Description  
Action  
P1200  
Flying Start  
Minimum = 0  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Starts SED2 into a spinning  
motor by rapidly changing the  
output frequency of the SED2  
until the actual motor speed is  
found. Then, the motor runs up  
to setpoint using the normal  
ramp time.  
Default = 0  
Maximum = 6  
Suggested = 2  
2. Press  
to advance to  
parameter P1200.  
3. Press  
to access the  
0 = Flying start disabled.  
1 = Flying start is always active,  
start in direction of setpoint.  
2 = Flying start is active, if power  
on, fault, OFF2, start in direction  
of setpoint.  
parameter values level.  
4. Press  
to advance to  
desired setting.  
3 = Flying start is active if fault,  
OFF2, start in direction of  
setpoint.  
5. Press  
to confirm and save  
the setting.  
4 = Flying start is always active,  
only in direction of setpoint.  
5 = Flying start is active if power  
on, fault, OFF2, only in direction  
of setpoint.  
6 = Flying start is active if fault,  
OFF2, only in direction of  
setpoint.  
NOTES:  
1. Flying start is useful for motors with high inertia loads.  
2. Settings 1 through 3 search in both directions. Settings 4 through 6 search only in the direction of the  
setpoint.  
3. Flying start must be used in cases where the motor may still be turning (such as after a brief input  
power break) or can be driven by the load. Otherwise, overcurrent trips occur.  
4. If the SED2 faults on F0002 (overvoltage) on a start command, flying start may have to be optimized by  
reducing the values in P1203 and P1202.  
Siemens Building Technologies, Inc.  
31  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P1202  
Motor Current: Flying Start  
Minimum = 10  
Default = 100  
Maximum =  
200  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Defines search current used for  
flying start. Value is in % based  
on the rated motor current  
(P0305).  
2. Press  
to advance to  
parameter P1202.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to  
desired value.  
5. Press  
to confirm and save  
the setting.  
NOTE:  
Reducing the search current may improve performance for flying start if the inertia of the system is not very  
high.  
P1203  
Search Rate: Flying Start  
Minimum = 10  
Default = 100  
Maximum =  
200  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Sets factor by which the output  
frequency changes during flying  
start to synchronize with the  
turning motor. This value,  
entered in % relative to the  
default time factor, defines the  
initial gradient and influences the  
time taken to search for the  
motor frequency.  
2. Press  
to advance to  
parameter P1203.  
3. Press  
to access the  
parameter values level.  
The search time is the time taken  
to search through all frequencies  
between  
4. Press  
to advance to  
desired value.  
f_max + 2 × f_slip to 0 Hz.  
5. Press  
to confirm and save  
the setting.  
NOTES:  
1. P1203 = 100% is defined as giving a rate of 2% of f_slip, nom/ms.  
2. P1203 = 200% would result in a rate of frequency change of 1% of f_slip, nom/ms.  
3. A higher value produces a flatter gradient, and thus a longer search time. A lower value has the  
opposite effect.  
32  
Siemens Building Technologies, Inc.  
Startup Procedures  
Automatic Restart  
CAUTION:  
Settings 2 through 7 can cause the motor to restart unexpectedly.  
Setting/  
Default  
Parameter  
Description  
Action  
P1210  
Automatic Restart  
Minimum = 0  
Default = 1  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Enables SED2 restart after a  
supply power break or after a  
fault.  
Maximum:  
5=Control Board  
Version 1.20  
or earlier  
6=Control Board  
Version 1.30  
7=Control Board  
Version 1.40  
2. Press  
to advance to  
P1210 = 0, Disabled:  
Automatic restart is disabled.  
parameter P1210.  
P1210 = 1, Trip reset after power on  
(P1211 disabled:  
3. Press  
to access the  
The inverter will acknowledge  
(reset) faults; that is, it will reset a  
fault when it is re-applied. This  
means the inverter must be fully  
powered down, a brownout is not  
sufficient. The inverter will not run  
until the ON command has been  
toggled.  
parameter values level.  
Suggested:  
3=Control Board  
Version 1.20  
or earlier  
6=Control Board  
Version 1.30  
7=Control Board  
Version 1.40  
4. Press  
to advance to  
desired setting.  
5. Press  
to confirm and save  
P1210 = 2, Restart after supply  
power blackout (P1211 disabled):  
The inverter will acknowledge the  
fault F0003 at power on after  
blackout and will restart the drive.  
It is necessary that the ON  
command is wired via digital input  
(DIN).  
the setting.  
P1210 = 3, Restart after brownout or  
fault (P1211 enabled):  
For these settings it is  
fundamental that the drive only  
restarts if it has been in a RUN  
state at the time of the faults  
(F0003, etc.). The inverter will  
acknowledge the fault and will  
restart the drive after a blackout  
or brownwout. It is necessary that  
the ON command is wired via  
digital input (DIN).  
Siemens Building Technologies, Inc.  
33  
SED2 VFD Electronic Bypass Option Operating Instructions  
Automatic Restart Continued  
Setting/  
Default  
Parameter  
Description  
Action  
P1210 = 4, Restart after supply power  
brownout (P1211 disabled):  
P1210  
(Continued)  
For these settings it is fundamental that  
the drive only restarts if it has been in a  
RUN state at the time of the fault  
(F0003). The inverter will acknowledge  
the fault and will restart the drive after a  
blackout or brownwout. It is necessary  
that the ON command is wired via  
digital input (DIN).  
P1210 = 5, Restart after blackout or fault  
(P1211 disabled):  
The inverter will acknowledge the faults  
(F0003 etc.) at power on after blackout  
and will restart the drive. It is necessary  
that the ON command is wired via digital  
input (DIN).  
P1210 = 6, Restart after supply power  
brown/blackout or fault (P1211 disabled):  
The inverter will acknowledge the faults  
(F0003 etc.) at power on after blackout or  
brownout and will restart the drive. It is  
necessary that the ON command is wired  
via digital input (DIN). Setting 6 causes  
the motor to restart immediately.  
P1210 = 7, Restart after supply power  
brown/blackout or fault (P1211  
enabled):  
This setting is for use where an external  
bypass system or process is interlocked  
with a relay that is set to  
P0731/P0732=52.3 (fault). The inverter  
functions the same as P1210=6 (trip on  
brownout, blackout or fault) but uses  
P1211 and only sets the fault bit  
P0731/P0732=52.3 when the specified  
number of restarts defined in P1211 has  
expired. If no trip occurs after 2 hours,  
the fault counter is reset.  
NOTES:  
1. Auto restart requires a constant ON command (such as via a digital input).  
2. P1200 flying start must be used in cases where the motor may still be turning, such as after a brief input power  
break, or can be driven by the load.  
3. A supply power brownout is when the power is interrupted and reapplied before the operator panel display has  
gone dark. It is a very short supply power break where the DC link has not fully collapsed.  
4.  
A supply power blackout is when the operator panel display has gone dark before the power is reapplied.  
It is a long supply power break where the DC link has fully collapsed.  
34  
Siemens Building Technologies, Inc.  
Startup Procedures  
Setting/  
Default  
Parameter  
Description  
Action  
P1211  
Number of Restart Attempts  
Minimum = 0  
Default = 3  
Maximum = 10  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Specifies the number of times  
SED2 will attempt to restart after  
supply power brownout or fault, if  
P1210 automatic restart is  
activated.  
Suggested =  
10  
2. Press  
to advance to  
parameter P1211.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to  
desired value.  
5. Press  
to confirm and save  
the setting.  
P1212  
Time to First Restart  
Minimum = 0  
Default = 3  
Maximum = 10  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Selects the time (seconds)  
before the SED2 is restarted for  
the first time if P1210 automatic  
restart is activated.  
Suggested =  
10  
2. Press  
to advance to  
parameter P1212.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to  
desired value.  
5. Press  
to confirm and save  
the setting.  
Siemens Building Technologies, Inc.  
35  
SED2 VFD Electronic Bypass Option Operating Instructions  
Setting/  
Default  
Parameter  
Description  
Action  
P1213  
Restart Time Increment  
Minimum = 0  
Default = 30  
Maximum =  
1000  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Selects the amount (seconds)  
that the restart time is  
incremented for each restart of  
the SED2 if P1210 automatic  
restart is activated.  
Suggested =  
10  
2. Press  
to advance to  
parameter P1213.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to  
desired value.  
5. Press  
to confirm and save  
the setting.  
Vdc Controller  
Setting/  
Default  
Parameter  
Description  
Action  
P1240  
Minimum = 0  
Default = 1  
Maximum = 3  
Configuration of Vdc  
Controller  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Enables/disabled Vdc controller.  
The Vdc controller dynamically  
controls the DC link voltage to  
prevent overvoltage trips on high  
inertia systems.  
2. Press  
to advance to  
parameter P1240.  
3. Press  
to access the  
parameter values level.  
Vdc-max automatically increases  
ramp-down times to keep the DC  
link voltage (r0026) within limits.  
4. Press  
to advance to  
desired value.  
0 = Vdc controller disabled  
1 = Vdc-max controller enabled  
2 = Reserved  
5. Press  
to confirm and save  
3 = Reserved  
the setting.  
36  
Siemens Building Technologies, Inc.  
Startup Procedures  
Pulse Frequency  
Setting/  
Default  
Parameter  
Description  
Action  
P1800  
Minimum = 4  
Pulse Frequency  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Default =  
Varies by  
model  
(hp/voltage  
dependent)  
Sets pulse frequency (kHz) of  
power switches in SED2. The  
frequency can be changed in  
increments of 2 kHz.  
2. Press  
to advance to  
parameter P1800.  
Pulse frequencies > 4 kHz  
selected on 380V to 480V units  
reduce the maximum continuous  
motor current.  
Maximum = 16  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to  
desired value.  
5. Press  
to confirm and save  
the setting.  
NOTES:  
1. Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor  
frequency).  
2. At 4 kHz, full output current is obtained up to 50 degrees C (CT mode); over 50 degrees C, full output  
may be obtained at 8 kHz.  
3. If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce SED2  
losses and radio-frequency emissions.  
4. Under certain circumstances, the SED2 may reduce the switching frequency to provide protection  
against over-temperature.  
Siemens Building Technologies, Inc.  
37  
SED2 VFD Electronic Bypass Option Operating Instructions  
Motor Data Identification  
Parameter  
Description  
Action  
Setting/  
Default  
P1910  
Motor Data Identification  
Minimum = 0  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Maximum = 20  
Performs stator resistance  
measuring.  
0 = Disabled.  
2. Press  
to advance to  
parameter P1910.  
1 = Identification of Rs with  
parameter change.  
3. Press  
to access the  
2 = Identification of Rs without  
parameter change.  
parameter values level.  
3 = Identification of the saturation  
characteristic with parameter  
change.  
4. Press  
to advance to setting  
P1910=1. Press  
and save the setting.  
to confirm  
20 = Set voltage vector.  
When P1910=1, Alarm A0541  
(motor data identification active)  
is output and internally P0340 is  
set to 3.  
Initiate the measuring operation  
with a continuous (steady-state)  
ON command.  
The motor aligns itself and  
current flows through it.  
Diagnostics are possible using  
r0069 (CO: phase current).  
On completion of the motor  
data identification routine,  
P1910 resets (P1910=0, motor  
data identification routine  
inhibited) and Alarm A0541 is  
cleared (deleted).  
5. To set the SED2 into a defined  
state, issue an OFF1 command.  
38  
Siemens Building Technologies, Inc.  
Startup Procedures  
Motor Data Identification Continued  
6. Press  
to advance to setting  
to confirm  
P1910=3. Press  
and save the setting.  
When P1910=3, Alarm 0541  
(motor data identification active)  
is output and internally P0340 is  
set to 2.  
Initiate the measuring operation  
with a continuous (steady-state)  
ON command.  
On completion of the motor  
data identification routine,  
P1910 resets (P1910=0, motor  
data identification routine  
inhibited) and Alarm A0541 is  
cleared (deleted).  
7. To set the SED2 into a defined  
state, issue an OFF1 command.  
NOTES:  
1.  
2.  
3.  
4.  
5.  
6.  
Motor must be cool to perform motor data identification.  
Before selecting motor data identification, perform quick commissioning.  
This measurement may take several minutes depending on motor size.  
When P1910=1, the calculated value for stator resistance (P0350) is overwritten.  
When P1910=2, the values already calculated (P0350) are not overwritten.  
When choosing the setting for measurement, observe the following:  
P1910=1 means that the value is actually adopted as P0350 parameter setting and applied to the  
control as well as being shown in the read-only parameters.  
P1910=2 means that the value is only displayed. That is, it is shown for checking purposes in the  
read-only parameter r1912 (identified stator resistance). The value is not applied to the control.  
Siemens Building Technologies, Inc.  
39  
SED2 VFD Electronic Bypass Option Operating Instructions  
Reset to Factory Defaults  
Setting/  
Default  
Parameter  
Description  
Action  
P0010  
P0970  
P0010:  
Setting = 30  
Default = 0  
Reset to Factory Default  
1. Press  
to enter the SED2  
parameter mode and to display  
r0000.  
Resets SED2 parameters to the  
factory defaults.  
P0970:  
Setting = 1  
Default = 0  
2. Press  
to advance to  
parameter P0010.  
3. Press  
to access the  
parameter values level.  
4. Press  
to advance to 30.  
5. Press  
to confirm and save  
the setting.  
6. Press  
to go to parameter  
to access the  
P0970.  
7. Press  
parameter values level.  
8. Press  
to advance to 1.  
9. Press  
to confirm and save  
the setting.  
NOTES:  
1. First set P0010 = 30.  
2. Stop SED2 (that is, disable all pulses) before you reset parameters to factory default values.  
3. The following parameters retain their values after a factory reset:  
P0918 (address of CB, communications board or module)  
P2010 (USS baud rate)  
P2011 (USS address)  
4. The reset process takes about 10 seconds.  
40  
Siemens Building Technologies, Inc.  
Required SED2 Parameter Settings  
Required SED2 Parameter Settings  
The following SED2 parameters are programmed by the factory before shipping. If  
these parameters are changed or if the SED2 is ever reset to factory default, you  
must reset these parameters as follows:  
Parameter  
Setting  
P0748  
P0702 in000  
P0702 in001  
P0731  
3
3
52.3  
NOTES:  
1. The Interlock Start on the Controller board is simply a follower that can be used  
to tell the drive to do anything by closing the SED2 Interlock Start and  
programming P0704.  
2. The Programmable Output on the Controller board is simply a follower of the  
SED2 Relay.  
3. The SED2 Fault must always be programmed as a fault. Do not change the  
SED2 relay fault for other uses via P0731.  
4. Changing P0700 resets all digital inputs and P0702 will require programming.  
Siemens Building Technologies, Inc.  
41  
SED2 VFD Electronic Bypass Option Operating Instructions  
Application Feature Setup  
J2  
Remote Start Input  
Remote Safety #1  
Remote Safety #2  
Interlock Start  
1
2
Overview  
3
4
5
DIGITAL  
6
INPUTS  
7
The Controller board supports six  
8
Essential Services  
Overload Trigger  
isolated digital inputs and six digital relay  
outputs for customer use (Figure 13).  
The digital inputs include: Remote Start  
Input, Remote Safety #1 and #2,  
Interlock Start, Essential Services, and  
Overload Trigger. The digital outputs  
include:  
9
10  
11  
12  
J1  
DIGITAL  
OUTPUTS  
Programmable Output, NO  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
COM  
NC  
VFD Fault, NO  
COM  
NC  
Drive Select, COM  
NO  
Bypass Select, COM  
VFD Fault  
NO  
Bypass Running, COM  
NO  
Programmable Output  
Drive Select  
Overload Fault, COM  
NO  
Figure 13. Controller Board Digital Inputs and Outputs.  
Bypass Select  
Bypass Running  
Overload Fault  
Auto Bypass without Interlock  
Description  
The Auto Bypass feature enables the SED2 to initiate automatic bypass mode  
operation. Closing of the SED2 Relay sends the motor to hand bypass mode. See  
the SED2 VFD Startup, Operation, and Maintenance Manual (125-3201) for  
programming of this relay and for its desired action.  
When the SED2 initiates bypass mode operation, the following occurs:  
The SED2 stops delivering power  
The output contactor opens.  
The bypass contactor closes and the Programmable Output on the Controller  
board closes.  
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Siemens Building Technologies, Inc.  
Application Feature Setup  
NOTES:  
1. All safety conditions must be met for bypass mode operation.  
2. The input contactor remains energized.  
The Electronic Bypass Option will return to VFD mode operation as soon as the  
SED2 Relay in control opens. When the Electronic Bypass Option returns to VFD  
mode operation, the following occurs:  
The SED2 Relay opens, the Programmable Output on the Controller  
board opens, and the bypass contactor opens.  
The output contactor closes.  
NOTE: All safety conditions must be met for VFD mode operation.  
Settings  
The Auto Bypass feature requires that Controller board  
DIP Switch 2 is set ON.  
NOTE: During operation, the Auto Bypass Enabled  
indicator is on steady.  
Example SED2 Settings  
Set parameters P0732 and P0748 for Auto Bypass on Drive Fault. Programming of  
the SED2 Relay is required for proper Auto Bypass activation. Set P0732 and P0748  
as follows:  
Parameter  
P0732 in000  
P0732 in001  
P0748  
Setting  
52.3  
52.3  
Siemens Building Technologies, Inc.  
43  
SED2 VFD Electronic Bypass Option Operating Instructions  
Interlock  
Description  
The Interlock feature (also called damper end switch logic) enables the SED2 outputs  
to inhibit motor start until a safety condition (proofing sequence) is confirmed. Any  
call to start the motor from the SED2 or bypass does not directly start the motor, but  
instead initiates the following Interlock procedure:  
The Interlock Start Logic Enable indicator is ON. Proofing is required to start  
in VFD or bypass mode.  
The Interlock Start Logic Command indicator turns ON and the Proofing  
indicator flashes.  
When in VFD mode, the SED2 Relay closes and the Controller board  
Programmable Output closes to initiate the proofing sequence. The  
Programmable Output relay is used to supply power to an external device  
such as a damper actuator.  
When not in VFD mode, the Controller board ignores the SED2 Relay.  
When in bypass mode, any call to start the motor in bypass (in either hand  
bypass or auto bypass) initiates the proofing sequence. The Programmable  
Output closes and is used to supply power to an external device such as a  
damper actuator.  
When control of the external device (such as a damper actuator) is satisfied,  
it must supply a contact closure to the Controller board Interlock Start. The  
Interlock Start Logic Command indicator turns OFF and the Proofing  
indicator turns ON. The motor then starts in the selected mode.  
Any call for the motor not to be running requires a new proofing sequence to  
be initiated.  
NOTE: This feature can only be used with a hardwired start/stop command.  
Settings  
The Interlock feature requires that Controller board DIP  
Switch 3 is set ON.  
NOTES:  
1. The Interlock Start Logic Enabled indicator is on  
steady.  
44  
Siemens Building Technologies, Inc.  
Application Feature Setup  
2. Example assumes hardwired start is in auto. If other, modify P0732 as  
appropriate.  
For proper Interlock operation, set the following SED2 parameters:  
P0700 in000 = 2  
Digital input that is the start command in the auto mode (from the  
damper end switch)  
P0700 in001 = 2  
Digital input that is the start command in the hand mode (from the  
damper end switch)  
P0701 in000 = 99 and P0701 in001 = 99  
Initiate BiCo  
P0702 in000 = 3 and P0702 in001 = 3  
P0732 in000 = 722.0  
Tells the drive through BiCo that instead of starting the drive in auto  
mode when the Remote Start input closes, it should close the SED2  
Relay.  
NOTE:  
If P1 is the start command in auto, change the following  
parameters:  
P0003 = 4 (before changing this setting, note the current  
setting)  
P3950 = 46  
P0732 in000 = 2090.0  
P0003 = Change back to previous setting (1, 2, or 3)  
P0732 in001 = 19.0  
Tells the drive through BiCo that instead of starting the drive in hand  
mode when the green Start button is selected, it should close the SED2  
Relay.  
P0704 in000 = 1 and P0704 in001 = 1  
NOTE: For a complete description of BiCo, see the SED2 VFD Startup,  
Operation, and Maintenance Manual (125-3201).  
Siemens Building Technologies, Inc.  
45  
SED2 VFD Electronic Bypass Option Operating Instructions  
DIGITAL INPUTS  
Remote Start Input  
J2  
1
2
Wiring Example for Interlock  
Remote Safety #1  
Remote Safety #2  
Interlock Start  
3
4
5
6
Customer  
Proof  
7
8
9
10  
11  
12  
DIGITAL OUTPUTS  
J1  
Power to  
Customer  
Device  
Programmable Output, NO  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
COM  
NC  
Essential Services  
Description  
The Essential Services feature allows full-power bypass mode control of the motor  
during an emergency scenario. Activation of Essential Services overrides any other  
selected operation. Essential Services ensures that the bypass contactor will not  
open when a safety input or overload opens. Power goes directly to the motor.  
NOTES:  
1. If using both the Interlock and Essential Services features, Essential Services  
waits 10 seconds for the Interlock to confirm the safety condition (such as  
opening a damper). After the 10-second delay, Essential Services controls the  
motor regardless of the Interlock safety condition status.  
2. Use extreme care when using the Essential Services mode. All safety circuits are  
no longer active (including motor overload and safety inputs to the Controller  
board).  
46  
Siemens Building Technologies, Inc.  
Application Feature Setup  
Settings  
The Essential Services feature requires that Controller  
board DIP Switch 1 is set ON.  
NOTE: The Essential Services indicator is on  
steady.  
Essential Services does not require SED2 parameter settings. The Essential  
Services feature simply puts the Electronic Bypass Option into override bypass mode  
no matter what operation is selected.  
J2  
1
Wiring Example for  
Essential Services  
2
3
DIGITAL INPUTS  
4
5
6
7
8
Customer  
Essential Services  
Initiation  
Essential Services  
9
10  
11  
12  
Siemens Building Technologies, Inc.  
47  
SED2 VFD Electronic Bypass Option Operating Instructions  
Interlock and Auto Bypass on VFD Fault  
Description  
Interlock and Auto Bypass features are both active. Auto bypass now becomes auto  
bypass on a VFD fault only (bypass is initiated by the SED2 Fault and this digital  
output must always be programmed to VFD fault).  
All set-up is the same as with Interlock (see the Interlock section in  
Application Feature Setup).  
Hand bypass is now initiated by SED2 Fault.  
The Programmable Output is still used to initiate the proofing sequence.  
Settings  
Interlock and Auto Bypass requires that Controller  
board DIP Switches 2 and 3 are set ON.  
NOTE: During operation, the Auto Bypass Enabled  
indicator is on steady. Also, the Interlock  
Start Logic Enabled indicator is on steady.  
See the Auto Bypass without Interlock on VFD Relay Output and Interlock sections  
for parameter settings.  
DIGITAL INPUTS  
J2  
Remote Start Input  
Remote Safety #1  
Remote Safety #2  
Interlock Start  
1
2
Wiring Example for  
Interlock and Auto  
Bypass on VFD Fault  
3
4
5
6
Customer  
Proof  
7
8
9
10  
11  
12  
DIGITAL OUTPUTS  
J1  
Power to  
Customer  
Device  
Programmable Output, NO  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
COM  
NC  
48  
Siemens Building Technologies, Inc.  
Technical Specifications  
Technical Specifications  
Table 5. Electronic Bypass Specifications.  
Specifications  
Input Voltage (3 phase)  
Digital Inputs  
Description  
208V, 3 ac±10%  
240V, 3 ac ±10%  
480V, 3 ac ±10%  
575V, 3 ac ±10%  
Six Digital Inputs as follows:  
Remote start input  
Remote safety 1  
Remote safety 2  
Interlock start  
Essential services  
Overload trigger  
Inputs require a contact closure capable of providing a low  
impedance path at currents less than 20 mA.  
Relay/Digital Outputs  
Six Relay/Digital Outputs as follows:  
VFD fault  
Programmable output  
Drive select  
Bypass select  
Running on bypass  
Overload fault  
Each relay has a maximum rating of 2A at 120V ac.  
Operating: 14°F to 104°F (-10°C to 40°C)  
Storage: –40°F to 158°F (–40°C to 70°C)  
0 to 95% rh, noncondensing  
Temperature  
Humidity  
Table 6. SED2 Specifications.  
Drive Specifications  
Description  
200V to 240V, 3 ac ± 10%. 1/2 hp to 60 hp, (2.3 Amps to 154 Amps)  
Input voltage, 3 phase  
power, and amps  
380V to 480V, 3 ac ± 10% 1/2 hp to 125 hp, (1.2 Amps to 178 Amps)  
500V to 600V, 3 ac ± 10% 1 hp to 125 hp, (2.3 Amps to 125 Amps)  
Input frequency  
47 Hz to 63 Hz  
0 Hz to 150 Hz  
0.9  
Output frequency  
Power factor  
VFD degree of efficiency  
Switch-on current  
96% to 97%  
Less than nominal input current  
Siemens Building Technologies, Inc.  
49  
SED2 VFD Electronic Bypass Operating Instructons  
Table 6. SED2 Specifications (Continued).  
Drive Specifications  
Auxiliary supply 24V  
Overload capacity  
Control method  
Description  
Glavanically separated, unregulated auxiliary supply (18V to 32V) 100 mA  
110% for 60 seconds  
Linear, parabolic and programmable V/f; and flux current control low-power  
mode  
PWM frequency  
4k Hz to 16k Hz (adjustable in 2k Hz increments)  
15 programmable  
Fixed frequencies  
Skip frequency bands  
Setpoint resolution  
4 programmable  
0.01 Hz digital, 0.01 Hz serial, 10 bit analog  
6: fully programmable and scalable isolated digital inputs, switchable  
Digital inputs  
(sink/source)  
Analog inputs  
2: 0 to 10 Vdc, 0/4 to 20 mA, can also be configured as digital inputs or  
Ni 1000 input  
Relay outputs  
Analog outputs  
Serial interface  
2: configurable 30 Vdc/5A (resistive), 250 Vac 2A (inductive)  
2: programmable (0/4 to 20 mA)  
RS-485 Transmission rate: Up to 38.4k Baud  
Protocols: Siemens, P1 and Johnson, N2;  
IP20: NEMA Type 1 with protective shield and gland plate installed  
IP54: NEMA Type 12 (400V and 500V series only)  
Protection level  
Operating: 14°F to 104°F (–10°C to 40°C)  
Storage: –40°F to 158°F (–40°C to 70°C)  
Temperature ranges  
Humidity  
95% rh, non-condensing  
Operational altitudes  
Up to 3280 ft (1000m) above sea level without de-rating  
Protection features  
Standards  
Under-voltage, Over-voltage, Overload, Ground fault, Short circuit, Stall  
prevention, Locked motor, Motor overtemperature l2t PTC, Over-temperature,  
Parameter PIN protection  
UL, cUL  
NOTE:  
SED2 Compliance with EN61000-3-12:  
From September 1st, 2005 all electrical apparatus covered by the EMC directive will have to  
comply with EN61000-3-12 “Limits for harmonic currents produced by equipment connected to  
public low voltage systems with input currents > 16A and =< 75 A per phase”.  
Siemens variable speed drives of the product range SED2 (Micromaster 436) fulfil the  
requirements of the EN 61000-3-12 (without the need for external line reactors) regarding the  
THD values of Table 3 under the pre condition of Rsce > 190. The required PWHD values will  
not be achieved. Due to this fact it is recommended to apply for connection approval at the local  
electricity board.  
The local electricity board will evaluate among many other data the content of the 5th harmonic  
current and the Line Power Factor "Lambda”, which is the ratio of active power and apparent  
power.  
Siemens frequency inverters are optimized in design and operation characteristics regarding  
energy efficiency and less interference with line supplies.  
50  
Siemens Building Technologies, Inc.  
Troubleshooting  
Troubleshooting  
WARNING:  
Always disconnect all power sources before opening the SED2 Electronic  
Bypass Option.  
Power-on Initialization Failure  
(Unit Fault Condition)  
During power-on initialization, a unit fault condition occurs if the Electronic Bypass  
Option did not pass the basic sanity test. Rather than flash normally, the basic sanity  
test indicator pauses, flashes a fault code, and then repeats.  
Table 7 shows the fault codes. For example, if the basic sanity test indicator flashes  
three times rapidly, pauses, and then repeats, this means that there is a keypad  
failure.  
Table 7. Basic Sanity Test Fault Codes.  
Basic Sanity  
Test Fault  
Description  
Code/Flashes  
1
2
3
4
5
6
7
8
Non-Volatile Memory Failure  
Flash Memory Failure (CRC, cyclic redundancy check)  
Keypad Failure  
RAM Memory Failure (not used)  
EEPROM Read error  
EEPROM Write Failure  
Runtime Flash Failure (CRC, cyclic redundancy check)  
Main Program Failed (or hangs)  
It may be possible to recover from the unit fault condition by simply attempting a  
power down/up of the Electronic Bypass Option. If the unit fault condition still exists,  
replace the Controller board.  
CAUTION:  
When powering down/up the Electronic Bypass Option, power down the unit,  
wait 5 minutes, and then power up the unit.  
Siemens Building Technologies, Inc.  
51  
SED2 VFD Electronic Bypass Option Operating Instructons  
Override Jumper  
An Override Jumper (J8) is supplied  
on the Controller board. Moving this  
BPEC  
BPEC  
jumper to the override position  
removes the Controller board and its  
keypad from the control and closes the  
drive output contactor (and the input  
contactor if supplied).  
J2  
J2  
J1  
J1  
J8  
J8  
OVERRIDE JUMPER  
J8 SHOWN IN  
NORMAL POSITION  
OVERRIDE JUMPER  
J8 SHOWN IN  
OVERRIDE POSITION  
Figure 14. Override Jumper J8 Location and Positions.  
Fuses  
The Controller board contains a fuse (F1) under its cover (Figure 15). Determine if  
the fuse F1 needs replacement as follows:  
1. If the basic sanity test indicator (Figure 15) is flashing, fuse F1 is OK and no  
action is required.  
2. Verify that 120 Vac power is available on the secondary side of the Electronic  
Bypass Option power transformer (Figure 15). If power is not proper, check the  
Electronic Bypass Option components such as:  
Power transformer  
Power transformer fuses (F2, F3, and F4). Table 8 provides fuse  
replacement information.  
3. If power is proper, check fuse F1 as follows:  
Power down the Electronic Bypass Option.  
Remove the Controller board cover.  
Remove fuse F1.  
Use an ohm meter to check the fuse.  
Replace fuse F1 if necessary.  
NOTE: Replace fuse F1 with an 8 AG, 1/2 amp, 250V, fast-acting instrument fuse  
such as a Bussmann AGX1/2 or Littlefuse 361.500.  
52  
Siemens Building Technologies, Inc.  
Troubleshooting  
Table 8. Fuse Replacement Information.  
Bypass Option Part Number  
VBE10.5… to VBE17.5…  
VBE110… to VBE110…  
VBE115… to VBE160…  
VBE20.5… to VBE27.5…  
VBE210… to VBE210…  
VBE215… to VBE260…  
VBE30… to VBE315…  
VBE320… to VBE320…  
VBE325… to VBE3125…  
VBE40… to VBE420…  
VBE425… to VBE425…  
VBE430… to VBE4125…  
Primary Fuse (F3 and F4)  
Bussmann/Littlefuse LP-CC-1  
Bussmann/Littlefuse LP-CC-2  
Bussmann/Littlefuse LP-CC-3  
Bussmann/Littlefuse LP-CC-1  
Bussmann/Littlefuse LP-CC-2  
Bussmann/Littlefuse LP-CC-3  
Bussmann/Littlefuse LP-CC-1/2  
Bussmann/Littlefuse LP-CC-1  
Secondary Fuse (F2)  
Bussmann/Littlefuse LP-CC-6/10  
Bussmann/Littlefuse LP-CC-1 1/4  
Bussmann/Littlefuse LP-CC-2  
Bussmann/Littlefuse LP-CC-6/10  
Bussmann/Littlefuse LP-CC-1 1/4  
Bussmann/Littlefuse LP-CC-2  
Bussmann/Littlefuse LP-CC-6/10  
Bussmann/Littlefuse LP-CC-1 1/4  
Bussmann/Littlefuse LP-CC-1 1/2 Bussmann/Littlefuse LP-CC-2  
Bussmann/Littlefuse FNQ-R-4/10 Bussmann/Littlefuse LP-CC-6/10  
Bussmann/Littlefuse LP-CC-8/10  
Bussmann/Littlefuse LP-CC-1 1/4  
Bussmann/Littlefuse LP-CC-1 1/4 Bussmann/Littlefuse LP-CC-2  
Siemens Building Technologies, Inc.  
53  
SED2 VFD Electronic Bypass Option Operating Instructons  
5
Remote Start/Stop  
VFD DI#3  
VFD DI#2  
8
Interlock Start Confirm  
28  
6
Isolated 0V  
VFD DI#1  
VFD  
Bypass  
OK to Run  
Input  
On/Off  
Hand  
Start  
COM  
25  
24  
22  
21  
Input  
Contactor  
SED2 Relay  
VFD DO#2, NO  
COM  
SED2  
VFD  
Bypass  
SED2 Fault  
Contactor  
VFD DO#1, NO  
VFD  
Remote  
Start  
Enable  
Overload  
Relay  
Output  
Contactor  
VFD INTERFACE  
VFD DO#1, NO  
1
2
3
4
5
J4  
J3  
COM  
VFD DO#2, NO  
COM  
10  
Motor  
VFD Fault  
9
8
7
6
STOP  
RESET  
Auto Bypass Enabled  
Essential Services  
VFD DI#1  
Safety Fault  
Isolated 0V  
VFD DI#2  
Overload Fault  
Enable Commanded Proofed  
INTERLOCK START LOGIC  
VFD DI#3  
NOTE:  
3-Contactor  
Keypad  
KEYPAD INTERFACE  
Ribbon Cable for Keypad  
MCU  
Shown.  
Pushbuttons and Indicators  
Basic Sanity Test LED  
Factory Use Only  
J8  
DIP Switch  
CONTROLLER  
BOARD  
J2  
J1  
Remote Start Input  
Remote Safety #1  
Remote Safety #2  
1
2
3
4
5
DIGITAL  
INPUTS  
6
Interlock Start  
Essential Services  
Overload Trigger  
7
8
9
10  
11  
12  
HIGH VOLTAGE  
DIGITAL  
OUTPUTS  
Programmable Output, NO  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
COM  
FUSE  
FUSE  
NC  
F4  
F3  
VFD Fault, NO  
COM  
NC  
TRANSFORMER  
Drive Select, COM  
NO  
HIGH VOLTAGE/  
120V  
STEP-DOWN  
POWER  
Bypass Select, COM  
NO  
Bypass Running, COM  
NO  
F1  
Overload Fault, COM  
NO  
J7  
TRANSFORMER  
J5  
3 2 1  
J6  
Override Jumper  
8
7
9
6
10 11 12 13 14  
5
4
3
2
1
FUSE  
F2  
Earth Ground  
120V Neutral  
120V Hot  
CONTACTOR  
CONTROLS  
INPUT  
CONTACTOR  
OUTPUT  
CONTACTOR  
CUSTOMER  
BYPASS  
CONTACTOR  
SUPPLIED  
3-PHASE  
POWER  
INPUT DEVICE  
OF VFD WITH  
ELECTRONIC BYPASS  
MOTOR  
Figure 15. Controller Board Inputs and Outputs.  
54  
Siemens Building Technologies, Inc.  
Troubleshooting  
Siemens Building Technologies, Inc.  
55  
SED2 VFD Electronic Bypass Option Operating Instructons  
Siemens Building Technologies, Inc.  
1000 Deerfield Parkway  
Buffalo Grove, IL 60089-4513  
Tel: +1 847-215-1000  
Fax +1 847-215-1093  
Siemens Building Technologies, Ltd.  
2185 Derry Road West  
Mississauga, ON L5N 7A6  
Canada  
Tel: +1 905-819-5800  

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