HD-96044N
Revised 03-01
Section 20
Installation and Operation Instructions for
Dual Set Point Speed Switch
HD9063 Series
(00-02-0179)
Please read the following information before installing. A visual inspection of this product for damage during shipping is recommended
before mounting. It is your responsibility to have a qualified person install this unit and make sure it conforms to NEC and local codes.
GENERAL INFORMATION
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔ Disconnect all electrical power to the machine.
✔ Make sure the machine cannot operate during installation.
✔ Follow all safety warnings of the machine manufacturer.
✔ Read and follow all installation instructions.
Description
Specifications
Power Supply:
Voltage: 8-30 VDC
Maximum Current: 150 mA
Frequency Signal:
Voltage, Magnetic Pickup Signal Models
The HD9063 Series is a unitized two set point speed switch with
SPDT relay outputs. HD9063 is a PC-board configuration with
standoffs for mounting in a control panel or cabinet.
Models are available for crank disconnect/overspeed and for
underspeed/overspeed applications. Trip points can be field
adjusted on all models. LED’s next to the set point potentiometers
indicate that the trip point has been reached and the relay(s) have
operated. An overspeed test circuit is built-in; it will actuate the
output relay at a point below actual overspeed set point.
•
•
Minimum: 0.35 Vrms
Maximum: 60 Vrms
Maximum Current, Magnetic Pickup Signal Models: 4.8 µA.
Adjustment Range, Magnetic Pickup Signal Models
•
HD9063 Model
The HD9063 can disconnect the starter on automatic start engine
applications and shutdown the engine if an overspeed situation
occurs. Re-engagement of the starter is inhibited until RPM
returns virtually to zero.
Crank Disconnect: 250-6,000 Hz
Overspeed: 1,100-10,000 Hz
HD9063-USOS Model
Underspeed: 200-5,800 Hz
Overspeed: 1,100-10,000 Hz
•
HD9063-USOS models allow operation of control circuits
according to the speed of the driver or as a pre-alarm.
Two separate adjustable speed switches are included on one
common board.
Reset Differential, Magnetic Pickup Signal Models
•
HD9063 Model
Crank Disconnect: Dropout 160 Hz ± 5%
Overspeed: 200 Hz Differential
HD9063-USOS Model
•
Underspeed: +5% of Set point Differential
Overspeed: 155 Hz ± 10% Differential
Output: Relay Contact, SPDT, Resistive Load: (2) 5 A, 30 VDC
Adjustment: (2) 270°–turn potentiometer
Temperature Range: 14 to 158°F (-10 to 70°C)
HD-96044N page 1 of 4
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WIRING
CAUTION: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF”
1. Connect terminal 5 on the HD9063 to engine ground and
connect terminal 4 to battery positive (see Figure 3).
(+) ( ) (+) ( )
1
2
3
4
5
6
7
8
9 10 11 12
K1
K2
2. Connect the magnetic pickup cable conductors to terminals
12
6 and 7.
To Engine
Crank Control
Circuit
3. If cable is shielded, connect shield to engine chassis ground.
Common
Common
4. If desired, connect a normally open test push button switch
between terminals 8 and 9.
To
Normally Open
Normally Closed
Normally Open
or
Shutdown
Circuits
to Shutdown
Circuits
(HD9063-USOS)
Normally Closed
5. Connect crank disconnect circuit to crank disconnect termi-
nals 1 thru 3 as discussed in Crank Disconnect Relay
Function, page 2. On HD9063-USOS models connect the
overspeed circuits 1 thru 3 as discussed in Overspeed Relay
and Underspeed Relay Function, page 2.
6. Connect the overspeed circuits to overspeed terminals 10 thru
12 as discussed in Overspeed Relay and Underspeed Relay
Function, page 2.
Test
Pushbutton
DC Positive
DC Negative
(Engine Ground)
From Magnetic Pickup
Figure 3
MAGNETIC PICKUP INSTALLATION
A magnetic pickup is an AC generator. It is normally installed
into the flywheel housing of an internal combustion engine, so
that the starter ring gear acts upon it to generate a voltage pulse
each time a gear tooth passes the end of the sensor.
Gap Chart
THREAD
SIZE
TURN
1/2
1/4
3/4
1
Magnetic Pickup Installation (see Figure 5)
Drill and tap a hole in the flywheel housing (See Specifications
Chart below for model and thread size). IMPORTANT: Drilling
too deep may damage ring gear teeth. Blow chips with air hose
when drilling and tapping hole.
.013 in.
(0.33 mm) (0.71 mm)
.015 in. .030 in.
.028 in.
.035 in.
(0.88 mm) (1.39 mm)
.045 in. .062 in.
.055 in.
5/8-18 UNF
3/4-16 UNF
(0.38 mm) (0.76 mm) (1.14 mm) (1.57 mm)
Always use a two-conductor shielded cable. Ground the
shield to a metal frame ground at the engine end only.
Gap Adjustment
Insert magnetic pickup and turn until it stops at the face of the gear.
Back-off the gear by turning the pickup counterclock-
Never run these wires
next to spark plug wires
or in wire loom with other
wires carrying inductive
loads or alternating current.
wise 1/4, 1/2, or 3/4 turn (Figure 4)
.
See Gap Chart (above, right) to determine gap
distance based on the turn. Check gap clear-
ance by rotating the gear completely around.
1/4
1/2
After adjusting,
set locknut.
NOTE: Magnetic pickup gap should be
3/4
Drill and tap casing
(see thread sizes in
Specifications).
adjusted so that the minimum voltage required
is attained at the engine’s lowest RPM. The
voltage will increase as the speed increases.
AC
Meter
Figure 4
If erratic readings occur, remove magnetic
pickup and check the magnetic tip for metal chips.
Gap
(see Gap Chart)
Casing
Murphy Magnetic Pickup Specifications Chart
Pickup
Model
Total
Length
Threaded
Length
Thread
Size
Gear (must be made
of magnetic material).
NOTE: Clean gear casing
and magnetic sensor
MP3298*
MP7906†
MP7905††
3 in. (76 mm)
3 in. (76 mm)
5/8-18 UNF
3/4-16 UNF
3/4-16 UNF
of metal chips or filings.
3 in. (76 mm)
3 in. (76 mm)
4-1/2 in. (114 mm)
4-1/2 in. (114 mm)
Figure 5
*
Replaces 20-01-0080 and MP100. Lead wire hookup (12 in. [305 mm]).
†Replaces 20-01-0081. Lead wire hookup (12 in. [305 mm]).
††Replaces 20-01-0082. Lead wire hookup (12 in. [305 mm]).
HD-96044N page 3 of 4
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ADJUSTING THE SPEED SWITCH
Adjustment of the Dual Set point Speed Switch is performed
Overspeed and Underspeed
Set Point Adjustment
OVERSPEED
when the system is otherwise operational in all respects.
See Figure 6 for location of Crank Disconnect, Underspeed and
Overspeed potentiometers.
1. Loosen locknut on Overspeed set point potentiometer and turn
potentiometer fully clockwise.
Crank Disconnect
Potentiometer
Underspeed Potentiometer
(HD9063-USOS)
or
2. Start engine and run at highest normal operating RPM.
Overspeed Potentiometer
3. Slowly turn Overspeed adjustment potentiometer counter-
clockwise until overspeed switch trips or engine shuts down.
The LED light should flash.
E
E
Crank
Overspeed
LED
Disconnect
or
EXT.
MAG.
PICKUP
4. Turn potentiometer approximately 2° clockwise, then
Underspeed
LED
EXT.
TEST
NC
NC
tighten locknut.
NO
C
NO
C
EXT.
POWER
(+) ( ) (+) (
)
5. Reset switches as applicable and restart engine.
1
2
3
4
5
6
7
8
9
10 11 12
NOTE: An overspeed test switch connected as shown in Figure 3
provides a means for decreasing set point for test purposes.
Figure 6
6. If a test push button is installed, press push button and verify
that overspeed LED (Figure 6) flashes and engine shuts down
or switch trips.
Crank Disconnect Set Point Adjustment
1. If engine serves as a backup for an electric pump or other
motor driven device, turn off the associated electric motor.
UNDERSPEED
2. Reset any associated switches.
NOTE: Underspeed is available on HD9063-USOS models only.
3. Ground engine ignition system or shut off fuel to engine to dis-
1. Loosen locknut on Underspeed set point potentiometer and turn
able engine from starting.
potentiometer fully counterclockwise.
4. Loosen locknut on Crank Disconnect set point potentiometer
2. Start engine and run at lowest normal operating RPM.
and turn potentiometer fully clockwise.
3. Slowly turn Underspeed adjustment potentiometer clockwise
until underspeed switch trips or engine shuts down. The LED
light should flash.
5. Operate electrical switch(es) as appropriate so that engine will
begin to crank.
6. While engine is cranking, slowly turn Crank Disconnect Set
point potentiometer counterclockwise until Crank Disconnect
LED lights (Figure 6). Engine should stop cranking.
4. Turn potentiometer approximately 2° counterclockwise, then
tighten locknut.
5. Reset switches as applicable and restart engine.
7. Now turn the potentiometer clockwise 1/16 turn.
NOTE: An overspeed test switch connected as shown in Figure 3
provides a means for decreasing set point for test purposes.
8. Enable engine and allow it to start, verifying that starter disengages.
If starter motor stays engaged too long, lower set point slightly
by turning potentiometer counterclockwise in increments of no
more than 1/16 turn. Re-test after each adjustment by starting
engine, and continue adjustment until starter disconnects as
soon as engine starts.
6. If overspeed test push button is installed, press push button and
verify that overspeed LED (Figure 6) flashes and engine shuts
down or switch trips.
If starter motor does not stay engaged long enough, raise set
point slightly by turning potentiometer clockwise in increments
of 1/16 turn. Re-test after each adjustment.
Warranty
A limited warranty on materials and workmanship is given with this FW
Murphy product. A copy of the warranty may be viewed or printed by
9. Tighten locknut on Crank Disconnect set point potentiometer.
NOTE: A starter protection feature prevents starter from being
engaged until engine almost completely stops after running.
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
+1 281 633 4500 fax +1 281 633 4588
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088
e-mail [email protected]
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555 fax +61 3 9358 5558
e-mail [email protected]
e-mail [email protected]
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100
fax +1 918 317 4266
e-mail [email protected]
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
+52 444 8206264 fax +52 444 8206336
Villahermosa Office +52 993 3162117
e-mail [email protected]
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
+1 661 272 4700 fax +1 661 947 7570
e-mail [email protected]
USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
Printed in U.S.A.
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