Murphy Automobile Parts GPM92 User Manual

GPM-9013B  
Revised 11-96  
Catalog Section 40  
(00-02-0104)  
®
FRANK W.  
MFR.  
Glow Plug Control Module  
Model GPM92  
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Automates Manual Glow Plug Preheat and  
Recycling Control in Diesel Engines  
Compatible with Most Murphy Automatic  
Start/Stop Controllers  
Two Field-Adjustable Time Delays:  
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Timer for Preheating Glow Plugs  
Before Initiating Start Sequence  
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Recycle Timer-When Engine Fails to  
Start on First Attempt  
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Preheat Bypass Circuit for Warm Weather  
LED’s to Assist with Sequence of Operations  
Description  
Specifications  
be used with an external summer/winter Power Requirements:  
The GPM92 is a solid-state delay module for  
automating the glow plug preheating and  
recycling process in diesel engines with  
automatic start controls.  
switch to bypass the preheat system during  
Voltage: 8-30 VDC.  
Current: 30 mA maximum @ 30 VDC.  
Input Polarity: negative ground.  
warm weather when preheating is not  
required.  
The GPM92 requires an external relay to  
handle the high current to the glow plugs.  
The start signal is connected to the GPM92  
allowing the glow plugs to be preheated  
before the starter is engaged.  
The GPM92 is designed to operate from  
either a maintained close to run, open to stop  
signal or a momentary close to run, momen-  
tary close to stop type circuit. The auto start  
controller must be configured to operate  
from a maintained close to run signal.  
The module includes two adjustable time  
delays, one for glow plug preheating time and  
the other to allow the auto start module to  
crank the engine and start it.  
If the engine fails to start before the recycle  
time delay expires, the GPM92 recycles for the  
full time set on the glow plug delay timer. It  
then signals the auto start controller to initiate a  
new cranking cycle until the engine starts.  
One bypass circuit overrides glow plug preheat  
time with a glow plug ready signal and con-  
trols the length of the glow plug heating cycle.  
A second bypass circuit is provided to turn  
off the glow plugs when the engine starts.  
The preheat is locked out, and the start signal  
is locked into the auto start controller until a  
stop signal is received. This circuit can also  
Signal Inputs:  
Start: Single pole, single throw (SPST)  
maintained, close to negative to run, open  
to stop or 2 SPST momentary, close to neg-  
ative to start and close to negative to stop.  
Glow Plug Time Delay Bypass: SPST  
maintained, close to positive to bypass.  
Application  
The GPM92 is intended for use on all diesel  
engines that require glow plug or flame type  
preheat and are equipped with automatic  
start-stop controls. The GPM92 is ideal for  
Murphy Automatic Start Controllers which do  
not include glow plug control provisions or  
other cold weather starting aids.  
Recycle Time Delay Bypass: SPST main-  
tained, close to negative to bypass or SPST  
maintained, close to positive to bypass.  
Output:  
Glow Plug Relay: Transistor, sinks to  
negative, 1 A @ 30 VDC.  
Start: Dry relay contact, 2 A @ 30 VDC.  
Features  
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Solid-State Control Module  
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Easy DIP Switch Programming  
NOTE: A customer-supplied relay for glow  
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5 LED Signal Indicators for:  
plugs is required.  
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Start (GPM92 receives start signal.)  
Recycle Bypass (Recycle bypass  
Glow Plug Timer: Adjustable from 1-127 sec-  
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onds; 7-element binary DIP switch.  
input received/engine running.)  
Glow Plug Bypass (Bypass input  
Recycle Timer: Adjustable from 1-127 sec-  
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onds; 7-element binary DIP switch.  
circuit has closed.)  
Glow Plug Output (Relay energized  
Temperature Range: -4 to 185°F  
(-20 to 85°C).  
Case: ABS Plastic Housing  
Shipping Weight: 0.488 lb. (0.221 kg).  
Shipping Dimensions: 4-3/4 x 4-3/4 x 3-1/8 in.  
(121 x 121 x 79 mm).  
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for heating glow plug.)  
Start Output (Preheat cycle completed.)  
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Quick Connect Terminal Blocks  
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Compact Design  
 

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