National Instruments Network Router cFP PWM 520 User Manual

FIELDPOINTOPERATING INSTRUCTIONS  
AND SPECIFICATIONS  
FP-PWM-520 and  
cFP-PWM-520  
Eight-Channel, 5 V or 10–30 V PWM Output Module  
These operating instructions describe how to install and use  
the National Instruments FP-PWM-520 and cFP-PWM-520  
pulse-width modulation modules (referred to inclusively as the  
[c]FP-PWM-520). For details on configuring and accessing the  
[c]FP-PWM-520 over a network, refer to the user manual for the  
FieldPoint network module you are using.  
Features  
The [c]FP-PWM-520 is a FieldPoint pulse-width modulation  
(PWM) output module with the following features:  
Eight PWM sourcing output channels  
0 to 100% duty-cycle capability with 12-bit resolution  
Short-circuit protection for outputs  
Outputs source 5 VDC or 10–30 VDC with user-provided  
power supply  
Independent configuration of the output period for each  
channel from 1 to 65,535 ms in 1 ms increments  
On/Off LED indicators  
250 Vrms CAT II continuous channel-to-ground isolation,  
verified by 2,300 Vrms, 5 s dielectric withstand test  
–40 to 70 °C operation  
Hot swappable  
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Installing the cFP-PWM-520  
The cFP-PWM-520 mounts on a Compact FieldPoint backplane  
(cFP-BP-x or cFP-180x), which provides operating power to the  
module. Installing the cFP-PWM-520 onto a powered backplane  
does not disrupt the operation of the bank.  
To install the cFP-PWM-520, refer to Figure 2 and complete the  
following steps:  
1. Align the captive screws on the cFP-PWM-520 with the screw  
holes on the backplane. The alignment keys on the  
cFP-PWM-520 prevent backward insertion.  
2. Press firmly to seat the cFP-PWM-520 on the backplane.  
3. Using a number 2 Phillips screwdriver with a shank of at least  
64 mm (2.5 in.) length, tighten the captive screws to 1.1 N m  
(10 lb in.) of torque. The nylon coating on the screws prevents  
them from loosening.  
4
3
5
2
4
2
1
1
2
3
cFP I/O Module  
Captive Screws  
cFP Controller Module  
4
5
Screw Holes  
cFP Backplane  
Figure 2. Installing the cFP-PWM-520  
© National Instruments Corp.  
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FP-PWM-520 and cFP-PWM-520  
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Wiring the [c]FP-PWM-520  
The FP-TB-x terminal base has connections for each of the eight  
output channels and for an external power supply to power the  
output channels and field devices. The cFP-CB-x connector block  
provides the same connections. Each channel has one output  
terminal (VOUT), one supply terminal (VSUP), and two common  
terminals (COM). All eight channels are referenced to the COM  
terminals. The V and VSUP terminals are all internally connected,  
as are the C and COM terminals.  
Table 1 lists the terminal assignments for the signals of each  
channel. Terminal assignments are also listed on the side panel  
of the cFP-PWM-520 and under the slide-in card on the front of the  
FP-PWM-520. Connect to the terminals using the terminal base,  
connector block, or other connectivity accessory.  
Table 1. Terminal Assignments  
Terminal Numbers  
*
VOUT  
VSUP  
Channel  
COM  
2, 18  
0
1
2
3
4
5
6
7
1
3
17  
19  
21  
23  
25  
27  
29  
31  
4, 20  
5
6, 22  
7
8, 24  
9
10, 26  
12, 28  
14, 30  
16, 32  
11  
13  
15  
* Install a 1 A maximum, fast-acting fuse on each VOUT terminal.  
Install a 2 A maximum, fast-acting fuse on each VSUP terminal.  
Use a 5 VDC or 10–30 VDC external power supply for the output  
channels. The power supply must provide enough current to power  
all of the loads on the output channels, up to a maximum of 1 A per  
channel. Connect the external power supply to multiple V and VSUP  
terminals and to multiple C and COM terminals as needed to  
ensure that the maximum current through any terminal is 2 A  
or less.  
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Install a 2 A maximum, fast-acting fuse between the external  
power supply and the VSUP terminal on each channel. Install  
a 1 A maximum, fast-acting fuse suitable for the load at the  
VOUT terminal. Figure 3 shows fuses where appropriate.  
2 A Max  
User-Supplied  
C
V
Fuse  
V
V
SUP  
1 A Max  
User-Supplied  
Fuse  
Protected  
Sourcing  
Output  
OUT  
5 VDC or  
10–30 VDC  
External  
+
Load  
COM  
COM  
Power Supply  
[c]FP-PWM-520  
Figure 3. Wiring the [c]FP-PWM-520  
Caution Maximum output current for the cFP-PWM-520  
is lower than 1 A if the module is operating in the  
50–70 °C temperature range. Refer to the Specifications  
section for more information, and select fuses for the VOUT  
terminals accordingly.  
Pulse-Width Modulator Output Circuit  
The [c]FP-PWM-520 output channels are optically isolated from  
the rest of the FieldPoint bank. The channels are sourcing outputs  
with short-circuit protection circuitry. Sourcing current means that  
the VOUT terminal provides a path to a voltage supply. In the ON  
state of the output period, a transistor is turned on between VSUP  
and VOUT. In the OFF state, this transistor is turned off, allowing  
only a small leakage current to flow.  
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In the ON state, the effective resistance between VOUT and VSUP  
causes a voltage drop between the external supply voltage and the  
output voltage. For example, if the external supply voltage is 5 V  
and the output current is 1 A, calculate the output voltage as  
follows:  
5 V – (1 A × RON) = VOUT  
where RON is the ON resistance and VOUT is the output voltage.  
Refer to the Specifications section for the value of the ON  
resistance.  
Short-Circuit Protection  
If the protection circuitry detects a short-circuit condition on an  
output channel, it disables the output. If the protection circuitry  
disables an output that would otherwise be in the ON state, the  
status indicator for that channel is still lit, but the output transistor  
is turned off.  
Detecting a Short-Circuit Condition  
To determine whether a channel is in a short-circuit condition,  
complete the following steps:  
1. In FieldPoint software, set the duty cycle to 100% for the  
channel in question. Refer to the Configuring the Output  
Channels section for more information about configuring the  
duty cycle.  
2. Measure the voltage between the VOUT and VSUP terminals for  
that channel.  
Under normal load conditions, the VOUT-to-VSUP voltage is  
less than 1 V when the output is ON continuously. Any voltage  
higher than 1 V indicates a short circuit. Typically, the  
VOUT-to-COM voltage is almost zero if the protection circuitry  
is activated.  
Resetting a Channel in a Short-Circuit Condition  
To reset a channel in a short-circuit condition, determine the cause  
of the condition and disconnect the load from the channel. The  
channel resets automatically when the load is removed.  
Alternatively, if completely removing the channel load is not  
convenient, reset the channel in any of the following ways:  
In FieldPoint software, set the duty cycle to 0%. The channel  
resets immediately.  
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Disconnect the external power supply from the  
[c]FP-PWM-520.  
Remove the [c]FP-PWM-520 from the terminal base or  
backplane.  
Power off the network module connected to the  
[c]FP-PWM-520.  
Normal operation can resume after you correct the short-circuit  
condition.  
Overcurrent Protection  
Each output channel on the [c]FP-PWM-520 has circuitry that  
protects it from current surges resulting from short circuits.  
Whether the module suffers damage from overcurrent conditions  
depends on the following factors:  
The amount of current through the channel  
The amount of time the current is above the current limit  
The frequency of current surges  
If the level of current through the output terminal is higher than the  
guaranteed trip current for the module, the channel trips and goes  
into an overcurrent state. In an overcurrent state, the channel turns  
off and the module is not damaged. If the level of current through  
the output terminal is higher than the minimum possible trip  
current and lower than the guaranteed trip current, the state of the  
channel is indeterminate and depends on factors such as the current  
level, the temperature, and the power supply.  
Inrush currents that exist for less than the trip time do not trip the  
protection circuitry. Refer to the Specifications section for more  
information about the maximum continuous output current, trip  
current, and trip time.  
Power Supplies and Overcurrent Conditions  
If a short circuit occurs, the current through an output terminal can  
exceed the current rating for the power supply and the maximum  
continuous current for the [c]FP-PWM-520.  
If the power supply you are using with the [c]FP-PWM-520 cannot  
supply more than the guaranteed trip current, the module may be  
damaged if a short circuit occurs.  
© National Instruments Corp.  
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FP-PWM-520 and cFP-PWM-520  
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Configuring the Output Channels  
A [c]FP-PWM-520 output channel uses period and duty-cycle  
settings to determine when the channel is on or off. To configure  
the period, complete the following steps in Measurement &  
Automation Explorer (MAX):  
1. On the Channel Configuration tab for the [c]FP-PWM-520,  
select Period from the Attribute menu.  
2. Enter an integer between 1 ms (1 kHz) and 65,535 ms  
(0.01525 Hz) in the Value field.  
To configure the duty cycle, write to the channel for which you  
want to set the duty cycle. The duty cycle is the proportion of time  
that the PWM signal is ON over the period.  
OnTime  
Period  
--------------------  
Duty Cycle =  
× 100  
Enter a value from 0 to 100 to set the duty cycle. The duty cycle has  
12-bit resolution (4,096 discrete duty-cycle settings).  
2
2
V
SUP  
1
0
3
3
1
PWM Output  
2
On Time  
3
Period  
Figure 4. Period and Duty Cycle of a PWM Output  
Status Indicators  
The [c]FP-PWM-520 has two green status LEDs, POWER and  
READY. After you insert the FP-PWM-520 onto a terminal base  
or the cFP-PWM-520 onto a backplane and apply power to the  
connected network module, the green POWER indicator lights  
and the [c]FP-PWM-520 informs the network module of its  
presence. When the network module recognizes the  
FP-PWM-520 and cFP-PWM-520  
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[c]FP-PWM-520, it sends initial configuration information to the  
[c]FP-PWM-520. After the [c]FP-PWM-520 receives this initial  
information, the green READY indicator lights and the module is  
in normal operating mode.  
In addition to the green POWER and READY indicators, each  
channel has a numbered, green status LED that lights when the  
channel is in the ON state.  
Upgrading Your FieldPoint Firmware  
You may need to upgrade your FieldPoint firmware when you add  
new I/O modules to your FieldPoint system. For information on  
determining which firmware you need and how to upgrade your  
firmware, go to ni.com/info and enter fpmatrix.  
Isolation and Safety Guidelines  
Caution Read the following information before  
attempting to connect the [c]FP-PWM-520 to any circuits  
that may contain hazardous voltages.  
This section describes the isolation of the [c]FP-PWM-520 and its  
compliance with international safety standards. The field wiring  
connections are isolated from the backplane and the inter-module  
communication bus. The isolation barriers in the module provide  
250 Vrms Measurement Category II continuous isolation, verified  
by 2,300 Vrms, 5 s dielectric withstand test. The [c]FP-PWM-520  
provides double insulation (compliant with IEC 61010-1) for  
working voltages of 250 Vrms1. Safety standards (such as those  
published by UL and IEC) require the use of double insulation  
between hazardous voltages and any human-accessible parts or  
circuits.  
Never try to use any isolation product between human-accessible  
parts (such as DIN rails or monitoring stations) and circuits that  
can be at hazardous potentials under normal conditions, unless the  
product is specifically designed for such an application, as is the  
[c]FP-PWM-520.  
1
Working voltage is defined as the signal voltage plus the common-mode voltage.  
Common-mode voltage is the voltage of the module with respect to ground.  
© National Instruments Corp.  
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Even though the [c]FP-PWM-520 is designed to handle  
applications with hazardous potentials, follow these guidelines to  
ensure a safe total system:  
There is no isolation between channels on the  
[c]FP-PWM-520. If a hazardous voltage is present on any  
channel, all channels are considered hazardous. Make sure that  
all other devices and circuits connected to the module are  
properly insulated from human contact.  
Do not share the external supply voltages (the V and C  
terminals) with other devices (including other FieldPoint  
devices), unless those devices are isolated from human contact.  
For Compact FieldPoint, you must connect the protective earth  
(PE) ground terminal on the cFP-BP-x backplane to the system  
safety ground. The backplane PE ground terminal has the  
following symbol stamped beside it: . Connect the  
backplane PE ground terminal to the system safety ground  
using 14 AWG (1.6 mm) wire with a ring lug. Use the 5/16 in.  
panhead screw shipped with the backplane to secure the ring  
lug to the backplane PE ground terminal.  
As with any hazardous voltage wiring, make sure that all  
wiring and connections meet applicable electrical codes and  
commonsense practices. Mount terminal bases and backplanes  
in an area, position, or cabinet that prevents accidental or  
unauthorized access to wiring that carries hazardous voltages.  
Do not use the [c]FP-PWM-520 as the only isolating barrier  
between human contact and working voltages higher than  
250 Vrms  
.
Operate the [c]FP-PWM-520 only at or below Pollution  
Degree 2. Pollution Degree 2 means that only nonconductive  
pollution occurs in most cases. Occasionally, however, a  
temporary conductivity caused by condensation must be  
expected.  
Operate the [c]FP-PWM-520 at or below Measurement  
Category II. Measurement Category II is for measurements  
performed on circuits directly connected to the low-voltage  
installation. This category refers to local-level distribution,  
such as that provided by a standard wall outlet.  
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Safety Guidelines for Hazardous Locations  
The cFP-PWM-520 is suitable for use in Class I, Division 2,  
Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2,  
AEx nC IIC T4 and Ex nC IIC T4 hazardous locations; and  
nonhazardous locations only. Follow these guidelines if you are  
installing the cFP-PWM-520 in a potentially explosive  
environment. Failing to follow these guidelines may result in  
serious injury or death.  
Caution Make sure that all products you use in hazardous  
locations are certified for such use. Refer to the product  
label or visit ni.com/certification, search by model  
number or product line, and click the appropriate link in  
the Certification column.  
Caution Do not disconnect I/O-side wires or connectors  
unless power has been switched off or the area is known  
to be nonhazardous.  
Caution Do not remove modules unless power has been  
switched off or the area is known to be nonhazardous.  
Caution Substitution of components may impair  
suitability for Class I, Division 2.  
Caution For Zone 2 applications, install the Compact  
FieldPoint system in an enclosure rated to at least IP 54  
as defined by IEC 60529 and EN 60529.  
Caution For Zone 2 applications, install a protection  
device across the external power supply and the COM  
terminal. The device must prevent the external power  
supply voltage from exceeding 42 V if there is a transient  
overvoltage condition.  
Special Conditions for Hazardous Locations Use in Europe  
The cFP-PWM-520 has been evaluated as EEx nC IIC T4  
equipment under DEMKO Certificate No. 03 ATEX 0251502X.  
Each module is marked  
hazardous locations.  
II 3G and is suitable for use in Zone 2  
© National Instruments Corp.  
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Specifications  
The following specifications are typical for a range of –40 to 70 °C  
unless otherwise noted.  
Output Characteristics  
Number of channels..........................8  
Output type .......................................Sourcing  
Output voltage ..................................Supply voltage – (Output  
current × Output impedance)  
Supply voltage ..................................5 VDC or 10 to 30 VDC,  
user-provided  
Maximum output current per channel  
Temperature Ranges  
Module  
–40 to 50 °C  
50 to 60 °C  
0.75 A  
1 A  
60 to 70 °C  
0.5 A  
cFP-PWM-520  
FP-PWM-520  
1 A  
1 A  
1 A  
ON resistance  
Revision E and later modules1 ...0.15 Ω  
Revision D and earlier  
modules ......................................0.3 Ω  
Pulse-width accuracy........................1, +3 μs, any period and  
duty cycle  
Short-Circuit Protection  
Minimum trip current  
Revision E and later modules.....9 A  
Revision D and earlier  
modules ......................................1 A  
1 The letter in the part number identifies the revision of the module. For example, part  
number 185715A-02 identifies a revision A cFP-PWM-520. The part number is  
printed on a label on the module. On the FP-PWM-520, the label is on the bottom of  
the module. On the cFP-PWM-520, the label is on the back of the module.  
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Guaranteed trip current  
Revision E and later modules.....12.5 A  
Revision D and earlier  
modules ......................................20 A  
Trip time  
Revision E and later modules.....10 μs at 13 A  
Behavior (revision E and later modules)  
Current Level  
0–1 A  
Channel Behavior  
Module Protection  
Channel does not trip  
Module is not damaged  
1–9 A  
Channel does not trip Module may be damaged  
9–12.5 A  
12.5 A  
Channel may trip  
Channel trips  
Module may be damaged  
Module is not damaged  
Behavior (revision D and earlier modules)  
Current Level  
0–1 A  
Channel Behavior  
Channel does not trip  
Channel may trip  
Channel trips  
Module Protection  
Module is not damaged  
Module may be damaged  
Module is not damaged  
1–20 A  
20 A  
Physical Characteristics  
Indicators ..........................................Green POWER and  
READY indicators,  
eight green output state  
indicators  
Weight  
FP-PWM-520 .............................140 g (4.9 oz)  
cFP-PWM-520 ...........................110 g (3.9 oz)  
© National Instruments Corp.  
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Mechanical Dimensions  
Figure 5 shows the mechanical dimensions of the FP-PWM-520  
installed on a terminal base. If you are using the cFP-PWM-520,  
refer to your Compact FieldPoint controller user manual for the  
dimensions and cabling clearance requirements of the Compact  
FieldPoint system.  
107.19 mm  
(4.22 in.)  
109.5 mm  
(4.31 in.)  
91.44 mm  
(3.60 in.)  
Figure 5. FP-PWM-520 Mechanical Dimensions  
Power Requirements  
Power from network module ............1 W  
Isolation Voltage  
Isolation voltage is verified by a dielectric withstand test.  
Channel-to-ground isolation  
Continuous .................................250 Vrms, Measurement  
Category II  
Dielectric withstand....................2,300 Vrms, 5 s max  
Channel-to-channel isolation............None  
Environmental  
FieldPoint modules are intended for indoor use only. For outdoor  
use, they must be mounted inside a sealed enclosure.  
Operating temperature ......................40 to 70 °C  
Storage temperature..........................55 to 85 °C  
Humidity...........................................10 to 90% RH,  
noncondensing  
Maximum altitude.............................2,000 m  
Pollution Degree ...............................2  
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Shock and Vibration  
These specifications apply only to the cFP-PWM-520.  
NI recommends Compact FieldPoint if your application is  
subject to shock and vibration.  
Operating vibration, random  
(IEC 60068-2-64)..............................10–500 Hz, 5 grms  
Operating vibration, sinusoidal  
(IEC 60068-2-6)................................10–500 Hz, 5 g  
Operating shock  
(IEC 60068-2-27)..............................50 g, 3 ms half sine,  
18 shocks at 6 orientations;  
30 g, 11 ms half sine,  
18 shocks at 6 orientations  
Hazardous Locations  
U.S. (UL) ..........................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
AEx nC IIC T4  
Canada (C-UL) .................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
Ex nC IIC T4  
Europe (DEMKO).............................Ex nC IIC T4  
Safety  
This product is designed to meet the requirements of the following  
standards of safety for electrical equipment for measurement,  
control, and laboratory use:  
IEC 61010-1, EN 61010-1  
UL 61010-1, CSA 61010-1  
Note For UL and other safety certifications, refer to the  
product label or visit ni.com/certification, search  
by model number or product line, and click the  
appropriate link in the Certification column.  
© National Instruments Corp.  
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Electromagnetic Compatibility  
This product is designed to meet the requirements of the following  
standards of EMC for electrical equipment for measurement,  
control, and laboratory use:  
EN 61326 EMC requirements; Industrial Immunity  
EN 55011 Emissions; Group 1, Class A  
CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A  
Note For EMC compliance, operate this device  
according to product documentation.  
CE Compliance  
This product meets the essential requirements of applicable  
European Directives, as amended for CE marking, as follows:  
2006/95/EC; Low-Voltage Directive (safety)  
2004/108/EC; Electromagnetic Compatibility Directive (EMC)  
Note Refer to the Declaration of Conformity (DoC) for  
this product for any additional regulatory compliance  
information. To obtain the DoC for this product, visit  
ni.com/certification, search by model number or  
product line, and click the appropriate link in the  
Certification column.  
Environmental Management  
National Instruments is committed to designing and manufacturing  
products in an environmentally responsible manner. NI recognizes  
that eliminating certain hazardous substances from our products is  
beneficial not only to the environment but also to NI customers.  
For additional environmental information, refer to the NI and the  
Environment Web page at ni.com/environment. This page  
contains the environmental regulations and directives with which  
NI complies, as well as other environmental information not  
included in this document.  
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Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of their life cycle, all products  
must be sent to a WEEE recycling center. For more  
information about WEEE recycling centers and  
National Instruments WEEE initiatives, visit ni.com/  
environment/weee.htm.  
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Where to Go for Support  
For more information about setting up the FieldPoint system, refer  
to these National Instruments documents:  
FieldPoint network module user manual  
Other FieldPoint I/O module operating instructions  
FieldPoint terminal base and connector block operating  
instructions  
Go to ni.com/support for the most current manuals, examples,  
and troubleshooting information.  
For telephone support in the United States, create your service  
request at ni.com/ask and follow the calling instructions or dial  
512 795 8248. For telephone support outside the United States,  
contact your local branch office:  
Australia 1800 300 800, Austria 43 662 457990-0,  
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,  
Canada 800 433 3488, China 86 21 5050 9800,  
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,  
Finland 358 (0) 9 725 72511, France 01 57 66 24 24,  
Germany 49 89 7413130, India 91 80 41190000,  
Israel 972 3 6393737, Italy 39 02 41309277, Japan 0120-527196,  
Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,  
Malaysia 1800 887710, Mexico 01 800 010 0793,  
Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,  
Norway 47 (0) 66 90 76 60, Poland 48 22 3390150,  
Portugal 351 210 311 210, Russia 7 495 783 6851,  
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,  
South Africa 27 0 11 805 8197, Spain 34 91 640 0085,  
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,  
Taiwan 886 02 2377 2222, Thailand 662 278 6777,  
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545  
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