Atkinson Electronics GSCM-mini-P User manual
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Circuit Board Division
800.261.3602 2 Revised 02/21
Table of Contents
Modes of Relay Operations......................................... 3
LED Indication Description.......................................... 3
Operational Thresholds ............................................... 3
Typical Wiring Diagram …….. ....................................... 4
Option 1 Diagram ......................................................... 5
Option 2 Diagram ......................................................... 5
Option 3 Diagram ......................................................... 5
Option 1 Starting Sequence ........................................ 6
Option 2 Starting Sequence ........................................ 7
Option 3 Starting Sequence ........................................ 8
Manual Off Auto Switch Options ............................... 9
Fault Shutdown Conditions......................................... 9
Automatic Starting for Battery Charging.................10
Generator Emergency Shutdown.............................10
LED Description and Meanings.................................11
Specifications ..............................................................11
Remote RV Generator Start Drawing ................12
Outback Inverter/Inverter Style Drawing.........13
Outback Inverter/Honda EUxx00is Drawing....14
Samlex America EVO Inverter Drawing.............15
Limited Warranty.....................................................16
Solving your generators two to
three wire start-stop problem.
Not Included But…….
Outback 48 Volt inverter
systems require isolation relay
A0365
Features & Applications
Inexpensive 2 wire to 3 wire start controller for
electric push to start/stop Duel fuel generators
Optimized for use with Outback Invertors
Supports four manufactures generator control:
Champion, Cummins/Onan, Duramax and
Westinghouse
Fixed start/stop pulse times, accounts for
multiple start attempts by generator’s ECU
Maximum auto-start run time limit (6 hours)
Remote run and fault indication included
ABS epoxy sealed for harsh environment
operation
Description
The GSCM-mini-P (Pulse) is a micro-processor based
generator start-stop module, designed to auto start-
stop generators that need a 3 to 4 wire connection
from a 2 wire 12 volt manual start command. The
GSCM-mini-P automatically goes into run mode
when it either receives a remote start indication
lamp signal (connected to terminal 8) or an AC Hz
signal from the generator (AC connected to terminals
9 & 10). Various LEDs are blinked or turned on to
indicated the run or fault status of the GSCM-mini-P.
Manually resetting the GSCM-mini-P by removing
the power and removes any lockout that allows the
generator to restart if called to do so.
The GSCM-mini-P is powered by 12VDC from the
generator battery and can monitor the battery
voltage and start the generator to charge its own
battery. The GSCM-mini-P is a limited function
controller that is part of the GSCM family.
All auto start battery voltage thresholds are
fixed, if adjustability is required use the GSCM
full function Generator Start Control Module.
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800.261.3602 3 Revised 02/21
Three Modes of Relay Operation
There are 3 program options based on the generator
make for the GSCM-mini-P’s two relay contacts to be
configured:Champion, Cummins/Onan &
Westinghouse, and Duramax
This is accomplished with an
optional jumper on terminal 6.
Option #1 Champion’s inverter generator:
Terminal 6 has no connection. The GSCM-mini-P
program is configured for a 1 second pulse (K1) to
wake up the generator’s ECU, and a second 1 second
pulse (K1) to begin the generators start sequence. On
shutdown, the K2 relay produces a 1 second pulse for
the ECU to stop the generator. See Section 1 for
operation description.
Option #2 Cummins/Onan & Westinghouse
generators: Terminal 6 connected to B+ (12VDC).
The GSCM-mini-P program configures K2 for main-
tained operation and K1 for 1 second start/stop pulse
operation. The K2 contact wires in parallel with the
power switch and K1 wires in parallel with the push
button switch. A SPDT relay is used to open the
connection between ground and the Ignition coil. See
Section 2 for operation description.
Option #3 Duramax generator: Terminal 6 is
connected to ground. The GSCM-mini-P program is
similar to option #2, instead of 3 start attempts per 1
second start pulse, It is configured for Duramax’s
single 1 to 5 second start pulse, if the generator fails
to start during the 5 second start pulse, the mini-P
generates another start pulse, is will attempt up to 6
times to start the generator before going into a fault.
See section 3 for operation description.
If adjustability is required then
refer to the GSCM full function
control module.
LED Indication Description
The GSCM-mini-P has six indication LEDs.
The Start LED blinks every 5 seconds to indicate it is ready for
a start signal. The LED will blink every 2.5 seconds to indicate
its running in auto start mode. On continuously indicates
running in manual start mode.
The Generator Hz LED blinks to indicate over/under Hz fault
and start failure due to maximum crank attempted. A slow
blink indicates an under Hz condition while a fast blink
indicates an over Hz condition. On continuously indicates AC
present in a non-run condition. A double blink indicates a
start failure condition. Four blinks indicates generator shut
down due to its own fault condition or lack of fuel.
The Run LED, On continuously indicates a valid run signal
from the generator.
The Fault LED, On indicates a fault condition has occurred
and GSCM-mini is in lockout and must be reset.
The K1 and K2 LEDs indicate the relay status.
Operational Thresholds
GSCM-mini-P’ fixed operational thresholds:
Start Pulse: 1 to 5 seconds
AC Crank Disconnect: 45Hz
DC Crank Disconnect Voltage greater than 9VDC
Under Speed Shutdown: 55Hz
Over Speed Shutdown: 65Hz
Max Auto Start Run time: 6 Hours
Manual Start Run Time: Indefinitely
Auto Start/Stop Thresholds: Start Stop
12V system 11.5V 13.8V Standard
24V system 23.0V 27.6V Auto selects
48V system 46.0V 55.2V Auto selects
Relay Configuration: Open input = Momentary Crank
(Terminal 6) Grounded input = Maintained Crank
B+ (12VDC) input = Ignition & Crank
Fault Detection:
Start failure (Depends on option)
Over Hz condition (10 seconds)
Under Hz condition (10 seconds)
Max run time auto restart within 30m
Generator stops due to its own fault condition
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800.261.3602 5 Revised 02/21
GSCM-mini-P Option #1 Champion Push Button
Power/start/stop
The GSCM-mini-P accepts Outback’s 2 wire switched 12VDC start /run signal or a dry contact, like Samlex, Trace and others,
it produces a 3-4 wire start/stop signal for most gas and propane generators. Using the generators remote port and remote
pilot lamp (PL) signal, if available, can make for a quick and easy instillation, otherwise it is wired in parallel with the power
and push to start/stop switch. The Pilot Lamp signal or 120/240VAC provides feedback telling the GSCM when the generator
has started and when the generator has completely shut down. A red connector with a protection diode is provided to
connect between terminal 8 on the GSCM-mini and pilot lamp wire for applications where the pilot lamp signal is positive
or high. If the pilot lamp signal is negative or goes low the pilot lamp signal inverter must be used, see Inverter Style
Generator. The GSCM-mini-P’s configuration terminal # 6 has not connection, the starting sequence is as follows:
1. The start LED blinks once every 5 seconds to indicate that the GSCM-mini is in a “ready” mode. When a manual
signal is received, the start LED lights continuously. After a 2 second delay, the K1 relay provides a 1 second pulse
to wake up the generator’s ECU, then after a second 2 second delay it provides another 1 second pulse to initiate
the ECU’s starting sequence. The Champion’s ECU will provide up to six starting attempts.
2. If the generator fails to start during six starting attempts and rest periods, approximately 90 seconds, the GSCM-
mini-P provides a 1 second pulse on the K2 relay to ensure the generator is not running and then enters the failed
to start fault. The Generator Hz LED does a double blink, the fault LED turns on and the GSCM-mini enters the
maximum crank lockout fault condition. This lockout condition remains until the GSCM-mini is reset by removing
power from terminal 2, waiting 5 seconds and then reconnecting power (see GSCM-mini wiring diagram, page ??).
This clears the lockout condition, and the GSCM-mini re-enters “ready” mode with the start LED blinking every 5
seconds.
3. When the generator starts, the GSCM-mini-P’s green Run LED turns on, indicating that it received a valid run signal.
A valid run condition is determined by one of two conditions: A 12V run status pilot light signal provided by the
generator connected to terminal 8, or by generators AC output frequency exceeding the crank disconnect setting of
45Hz (terminals 9 & 10).
4. If the generator starts but shuts down after a few seconds due to a fuel problem, etc., the GSCM-mini-P exits the
run mode, energizing the K2 relay for 1 second, then enters a 60 second delay period blinking the yellow start LED
rapidly, then returns to “ready” mode. The GSCM-mini-P will then try to start the generator again in manual mode
or after a 5 minute delay period in auto-start mode.
5. If the generator starts but shuts down after the 60 seconds stabilization period, due to a fuel problem, low oil
pressure, broken AC Hz or 12V run status wire, the GSCM-mini-P exits the run mode, energizing the K2 relay for 1
second, then turns on the Red Fault LED and blinks the generator Hz orange LED 5 times with a 2 second delay
between blinks. The GSCM-mini enters a fault shutdown lockout condition and must be powered down to reset the
fault lockout.
6. When a run condition is detected, the GSCM-mini turns on the green run LED and transistor output (remote run
lamp terminal 11).
7. If no faults occur, the generator will continue to run until one of the following occurs: The manual start signal is no
longer received and the auto battery charge voltage or maximum auto run time has been reached, while running in
auto charge mode over Hz condition, under Hz condition occurs if the generator over/under Hz shutdown is enabled,
or the generator runs out of gas
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800.261.3602 6 Revised 02/21
GSCM-mini-P Option #2 Cummins/Onan, Westinghouse push to start/stop
The GSCM-mini-P’s configuration terminal # 6 is connected to +12VDC (terminal # 3), this configures the GSCM-mini-P
for a 1 second start/stop pulse on the K1 relay contact and a maintained power/run on the K2 contact. When the
GSCM-mini-P is powered by connecting B+ (12.0 VDC) to terminal 2, the Start LED turns on for 5 seconds while the
GSCM-mini initializes with option #2 configuration then begins blinking the start LED once every 5 seconds. The GSCM-
mini’s starting sequence is as follows.
1. The start LED blinks once every 5 seconds to indicate that the GSCM-mini is in a “ready” mode. When a manual
start signal is received, the start LED lights continuously. After a 2 second delay, K2 relay energizes closing its
normally open contact to power the generator’s ECU, then after another 2 second delay, it provides a 1 second
start pulse by energizing the K1 relay contact for 1 second. The generator’s ECU then makes three attempts to
start the generator.
2. If the generator fails to start during the three starting attempts and rest periods, approximately 50 seconds, the
generator will go into a failed to start fault requiring the generators ECU to be reset by powering down the
generator. The GSCM-mini-P starts a 1 minute timer when it provides the start pulse and looks for a valid run
feedback signal.
3. The run feedback signal can be either: a 12vdc status pilot lamp signal provide by the generator that is connected
to the GSCM-mini-P’s terminal #8, or by the generator producing its 120VAC output which would be connected to
the GSCM-mini-P’s GenHz input (terminal #9 and 10).
4. When the generator starts and the GSCM-mini-P receives the feedback signal it drops in to the run mode turning
on the green run LED.
5. If the generator fails to start after 3 three starting attempts, the GSCM-mini-P’s 1 minute start timer expires and
the GSCM-mini runs thru its re-start routine, de-energizing the K2 relay powering down the generator, which
clears it failed to start fault, then waits 15 seconds and repeats the starting routine.
6. If the generator fails to start after the second round of three attempts the GSCM-mini-P turns on its red fault LED
and the GSCM-mini enters the Maximum crank lockout condition and the Generator Hz LED does a double blink.
This lockout condition remains until the GSCM-mini is reset by removing power from terminal 2, waiting 5 seconds
and reconnecting power. This clears the lockout condition, and returns to ready mode.
7. If the generator starts but shuts down after a few seconds due to a fuel problem, etc. The GSCM-mini goes thru
its shutdown routine then re-enters ready mode after a 60 second delay. During this delay the start LED will blink
rapidly. The GSCM-mini will then try to start the generator again in manual mode or after a 5 minute delay period
in auto-start mode.
8. When a run condition is detected, the GSCM-mini turns on the run LED and open collector transistor output
(remote run lamp) and after a 60 second generator stabilization period it monitors the run feedback signal.
9. If the generator starts but shuts down after the 60 seconds stabilization period, due to a fuel problem, low oil
pressure, broken AC Hz or 12V run pilot light status wire, the GSCM-mini turns off the run LED and turns off K2
relay, and turns on the fault LED blinks the orange GenHz LED five times every two seconds. The GSCM-mini enters
a fault shutdown lockout condition and must be powered down to reset the fault lockout.
10. If no faults occur, the generator continues running until one of the following occurs: The manual start signal is no
longer received, the auto battery charge voltage or max run time has been reached while running in auto charge
mode, an over or under Hz condition occurs if generator Hz shutdown is enabled or the generator runs out of gas.
11. Shutdown routine, K1 provide a 1 second stop pulse, then 15 second later K2 relay de-energizes, powering down
the generator.
12. The generator remains off until another start signal is received.
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800.261.3602 7 Revised 02/21
GSCM-mini-P Option #3 DuraMax push to start/stop
The GSCM-mini-P’s configuration terminal # 6 is connected to ground (terminal # 7), this configures the GSCM-mini-P
for a 1 second start/stop pulse on the K1 relay contact and a maintained power/run on the K2 contact. When the
GSCM-mini-P is powered by connecting B+ (12.0 VDC) to terminal 2, the Start LED turns on for 5 seconds while the
GSCM-mini initializes with option #3 configuration (generators that do not have multiple starting attempts) then begins
blinking the start LED once every 5 seconds. The GSCM-mini’s starting sequence is as follows:
1. The start LED blinks once every 5 seconds to indicate that the GSCM-mini is in a “ready” mode. When a manual
start signal is received, the start LED lights continuously. After a 2 second delay, K2 relay energizes closing its
normally open contact to power the generator’s ECU and will remained energized for the duration of the start and
run cycle. Then after another 2 second delay, the mini provides a 1 second start pulse by energizing the K1 relay
contact for 1 second. The generator’s ECU then makes one attempt to start the generator.
2. If the generator fails to start during the starting attempt and the run feedback period, approximately 15 seconds,
the GSCM-mini will again provide a one second start pulse, followed by the run feedback period watching to see
if the generator has started. It will provide a total of six start attempts.
3. The run feedback signal can be either: a 12vdc status pilot lamp signal or a 12vdc charging port provided by the
generator that is connected to the GSCM-mini-P’s terminal #8, or by the generator producing its 120VAC output
which would be connected to the GSCM-mini-P’s GenHz input (terminal #9 and 10).
4. When the generator starts and the GSCM-mini-P receives the feedback signal it drops in to the run mode turning
on the green run LED.
5. If the generator fails to start after 6 starting attempts, the GSCM-mini-P turns on its red fault LED and the GSCM-
mini enters the Maximum crank lockout condition and the Generator Hz LED does a double blink. This lockout
condition remains until the GSCM-mini is reset by removing power from terminal 2, waiting 5 seconds and
reconnecting power. This clears the lockout condition, and returns to ready mode.
6. If the generator starts but shuts down after a few seconds due to a fuel problem, etc. The GSCM-mini goes thru
its shutdown routine then re-enters ready mode after a 60 second delay. During this delay the start LED will blink
rapidly. The GSCM-mini will then try to start the generator again in manual mode or after a 5 minute delay period
in auto-start mode.
7. When a run condition is detected, the GSCM-mini turns on the run LED and open collector transistor output
(remote run lamp) and after a 60 second generator stabilization period it monitors the run feedback signal.
8. If the generator starts but shuts down after the 60 seconds stabilization period, due to a fuel problem, low oil
pressure, broken AC Hz or 12V run pilot light status wire, the GSCM-mini turns off the run LED and turns off K2
relay, and turns on the fault LED blinks the orange GenHz LED five times every two seconds. The GSCM-mini enters
a fault shutdown lockout condition and must be powered down to reset the fault lockout.
9. If no faults occur, the generator continues running until one of the following occurs: The manual start signal is no
longer received, the auto battery charge voltage or max run time has been reached while running in auto charge
mode, an over or under Hz condition occurs if generator Hz shutdown is enabled or the generator runs out of gas.
10. Shutdown routine, K1 provide a 1 second stop pulse, then 15 second later K2 relay de-energizes, powering down
the generator.
11. The generator remains off until another start signal is received.
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800.261.3602 8 Revised 02/21
GSCM-mini 60Hz Manual Off Auto Switch Options
The manual start signal is created by connecting terminal 5 (manual start) to terminal 3 (B+12VDC) through a power/reset
switch. It may also be generated by an Outback Inverter using the AUX+/- connections on the remote terminal block. The
Outback provides a switched +12VDC signal for the GSCM-mini 60Hzs manual start input. An optional manual-off-auto switch
can be installed to provide user flexibility for manual starts, resets, turning the unit off, or auto starting from inverter. See
GSCM-mini 60Hzs wiring diagram, upper right hand corner.
GSCM-mini 60Hz Fault Shutdown Conditions
The GSCM-mini 60Hz detects five fault shutdown conditions, they are as follows:
1. Failure to start with 3 cranking attempts (see Section-1:2, 2:2,5, & 3:2,5). The generator Hz shutdown LED does a double
blink and fault LED on continuously.
2. High frequency (over Hz) condition. If the generator AC output is connected to terminals 9 and 10 and the generator
Hz enable terminal #8 is grounded, the GSCM-mini monitors the generators output frequency and if it exceeds the 65
Hz fixed threshold for 10 seconds, the generator shuts down and the generator Hz shutdown LED blinks rapidly. The
generator Hz LED blinks during this 10 second period.
3. Low frequency (under Hz.) condition. If the generator AC output is connected to terminals 9 and 10 and the generator
Hz enable terminal #8 is grounded, the GSCM-mini monitors the generators output frequency and if it drops below the
55 Hz fixed threshold for 10 seconds, the generator shuts down and the generator Hz shutdown LED blinks slowly. The
generator Hz LED blinks during this 10 second period.
4. Auto Start within 30 minutes of max run time shutdown (see Section-6:4). The generator Hz shutdown LED does a triple
blink and fault LED on continuously.
5. Generator shuts on its own fault. While the GSCM-mini is in run mode, and the generator is running, if the generator
shuts down on a fault condition (low oil pressure, hi temperature, or out of fuel) or the AC Hz signal fuse or wire opens
or the 12V run status wire opens, the GSCM-mini goes thru its shutdown routine and enters a fault condition, turning
on the red fault LED and blinking the generator Hz LED four times every two seconds.
The over/under Hz detection not enabled until the generator has been running for 60 seconds and will shut down the generator
after 10 continuous seconds of Hz fault condition, locking it out until a power down reset and power back up. The fault open
collector transistor output (terminal 12) will energize a user supplied remote lamp or DC relay (not exceeding 300 milliamp coil
current) whenever a fault shutdown occurs and will de-energize the relay when the fault is reset.
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800.261.3602 9 Revised 02/21
GSCM-mini-P Automatic Starting for Battery Charging
The GSCM-mini-P can monitor either the generator battery voltage or a battery bank voltage and automatically start/stop the
generator based on battery voltage. This is accomplished by connecting the battery voltage to the battery sense input (terminal
4). The GSCM-mini 60Hz monitors a battery voltage range of 0 to 60VDC and automatically determines the start and stop set
point based on battery voltage (12, 24, or 48VDC). Below 16VDC - uses 12V thresholds, between 16 to 32V -uses 24V thresholds,
above 32V - uses 48V thresholds. This mode is disabled if the voltage on terminal 4 is less than 6V, (no connection).
1. The GSCM-mini-P monitors the battery sense input and when the battery voltage drops below the start threshold the
Start LED begins blinking every second. When the battery voltage has remained below the start threshold for 5
continuous minutes the auto start sequence begins. If the battery voltage rises above the start threshold during the 5
minute period the 5 minute timing cycle starts over. (Temporary battery voltage fluctuations such as instantaneous
inverter loads will not start the GSCM). The start LED blinks every 3 seconds while the GSCM-mini is running the
generator in auto-start mode.
2. The GSCM-mini-P starts the generator as described in each of the three generator type sections.
3. The GSCM-mini-P shuts down the generator (as described in Sections 1, 2, or 3) whenever the battery voltage exceeds
the stop threshold for 10 minutes. The Start LED blinks (every second) during this 10 minute period. The GSCM-mini
will exit the 10 minute period and shutdown the generator if the battery voltage exceeds the stop threshold by +1.0V
for a 12V system, 2V for 24V system and 4V for a 48V system. The generator remains off until the battery voltage drops
below the start threshold voltage.
4. The GSCM-mini-P will shut down the generator when it has run in auto-start battery charging mode for 6 hours and has
not charge the battery above the shutdown threshold. The GSCM-mini-P then returns to ready mode looking for a start
command. If the battery voltage drops below the Auto start threshold within 30 minutes of a max run time shut down
the GSCM-mini-P will enter a max run time fault condition and lock out the start sequence and requires a power down
reset. The generator Hz LED will blink 3 quick blinks every 5 seconds and the fault LED is on continuously.
5. If the user wishes to manual-start the generator from a separate pressure switch, level switch, thermostat or inverter
start contact, etc., the battery voltage is fed through the switch (pressure switch etc.) contact to Manual start terminal
5. Closing the contact will cause the GSCM-mini to start the generator. Some inverters provide a switch 12VDC signal
to start the generator. This switched voltage can be connected directly to the manual start terminal 5 and ground
terminal 7.
GSCM-mini-P Generator Emergency Shutdown
The GSCM-mini-P Generator Start Stop module is NOT AN EMERGENCY SHUTDOWN DEVICE! If the manual start signal is
removed the generator will go through a normal shutdown which may take up to 15 seconds to completely shut down the
generator.
A RECOMMENDED EMERGENCY SHUTDOWN SOLUTION is to install a separate “Kill” switch and label it as such. The
recommended wiring is shown on page-2 of these instructions and also in Application 1. Disconnecting the power to the GSCM-
mini module will force the relays to open. This will shut down generators that require a maintained run signal from K1 relay.
However this also prevents the K2 relay from closing to shut down those generators requiring a momentary stop signal. Using
a double pole “Kill” switch and wiring the second pole in parallel with the K2 relay terminals will force the generator to stop in
an emergency situation such as a fuel spill. (See note 1 on wiring diagram, page 2, for Ignition/crank emergency shutdown
option).
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800.261.3602 10 Revised 02/21
LED Description and Meanings
Start: One blink every 5 seconds = ready mode, looking for a start signal
One blink every 2.5 seconds = auto start mode operation
One blink every other second= auto start/stop period
Continuous = manual start signal received
Fast blink = 60 second delay after start signal removed before generator started
Generator Hz Shutdown Fast blink = over speed condition
Slow blink = under speed condition
Double blink = maximum crank attempts reached, failed to start
Triple blink = auto start attempted with-in 30 minutes of a max run time (6 hour ) shutdown
Four blinks every 2 seconds = AC Hz or 12V run status signal lost during run mode
Continuous = start function disabled, AC Hz detected while in ready mode
Run Continuous = GSCM-mini has a valid run signal from generator
Fault Continuous = GSCM-mini is in a fault condition and requires a reset
K1 & K2 Continuous = status of K1 and K2 relays on
Specifications
Size: 5.13" L x 2.853" W x 1.35" H
Weight: 20oz.
Mounting: 2 screws through tabs
Power: 12VDC Battery
9.5 to 15VDC
Quiescent current < 10mA
Relay current < 25mA each
Manual Input: B+ (12VDC) input = on condition
Open input = off condition
Battery Input: 0-60VDC
Auto Start/
Stop Threshold: 12V System 11.5V, 13.8V
24V System 23.0V, 27.6V
48V System 46.0V, 55.2V
Relay
Configuration: Open input = momentary crank
(Terminal 6) Grounded input = maintained crank
B+ (12VDC) input = ignition & crank
Ambient Temp: -40 to 85°C
Gen. Hz Enable: Open input =
(Terminal 8) Generator Hz shutdown not active
Grounded input =
Generator Hz shutdown active
12VDC input =
Generator run Status input
Over/under Hz shutdown
not active
Frequency Input: 24VAC, 120VAC & 240VAC 0-100 Hz
(Terminals 9 & 10)
Output Ratings: Two 10 AMP 28VDC relay contacts,
K1 has 38VDC MOV across contact.
Two open collector NPN transistors,
maxium 300mA each
Fault Detection: Start failure, (3 attempts)
Over Hz condition (10 seconds)
Under Hz condition (10 seconds)
Max run time (6 hours)
Loss of AC Hz or 12V run status signal
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800.261.3602 11 Revised 02/21
GSCM-mini-P Champion Model # 100573 4KW w/Wireless Remote
The GSCM-mini-P’s K1 &K2 relay contact wire in parallel with each other and the generators Start/Stop push button. The
GSCM-mini-P’s K1 relay provides the turn on one second pulse and then 2 seconds later provides a second pulse to start the
generator. The K2 relay contact provides the stop pulse to shutdown the generator. The GSCM-mini_p monitors the AC
output to know when the generator has started. The Champion ECU provides up to six starting attempts before going into a
fault condition.
The GSCM-mini-P’s terminal #6 is not connected. Terminal #3 (+12vdc) is connected to Samles’s normally open relay contact,
and the common contact wires back to terminal #5 on the GSCM-mini-P. The generators AC output is wired to terminals # 9 &
10 providing the run feedback signal. An optional Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 5 GSCM-mini-P opion#1.
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800.261.3602 12 Revised 02/21
GSCM-mini-P Cummins/Onan P4500I generator & Samlex Inverter
Wiring In parallel with engine and start switches
The GSCM-mini-P’s K1 relay contact wire in parallel with the generators Start/Stop push button. It’s K2 relay contact wires to
two control relays, C1’s normally open (87) and common (30) tabs, wires in parallel with the engine switch terminals 1 & 2
which are the power contacts. C2’s normally closed (87a) and common (30) tabs, wires in series with the ground wire that
connects to terminal 5 of the engine switch, when not energized it grounds the ignition coil. Engine switch to be left in the OFF
position.
The GSCM-mini-P’s terminal #6 is connected to terminal #3 (+12vdc) and to Samlex’s normally open relay contact, and the
common contact wires back to terminal #5 on the GSCM-mini-P. The generators AC output is wired to terminals # 9 & 10
providing the run feedback signal. An optional Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 6 GSCM-mini-P opion#2.
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800.261.3602 13 Revised 02/21
GSCM-mini-P Cummins/Onan P9500DF generator & Samlex Inverter
Wires to the Remote/ATS connector
The GSCM-mini-P uses the generator’s Remote/ATS connector for all connections to the generator. The GSCM-mini-P’s
power, relay and run feedback connections us the ATS connector as shown above. A control C1 relay is wired in series with
the ground wire to break the ground connection running to the engine switch terminal #5. The C1 relay connects as follows
terminals 86 and 30 connect to ground, terminal 85 connects to engine switch terminal #1 and terminal 87a connects to
engine switch #5. Engine switch to be left in the OFF position.
The GSCM-mini-P’s terminal #6 is connected to terminal #3 (+12vdc) and to Samlexs’s normally open relay contact, and the
common contact wires back to terminal #5 on the GSCM-mini-P. The generators DC output is wired to terminals # 7 & 8
providing the run feedback signal. An optional Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 6 GSCM-mini-P opion#2.
If a battery tender/charger is used, the engine switch should be left in the ON position and the C1 control relay is not used.
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800.261.3602 14 Revised 02/21
GSCM-mini-P Westinghouse Model # WGen4500i & Samlex Inverter
The GSCM-mini-P’s K1 relay contact wire in parallel with the generators Start/Stop push button. It’s K2 relay contact wires to
engine switch terminal 1 & 2 and a control relay (C2) terminals 85 & 86, C2’s normally closed (87a) and common (30) tabs,
wires in series with the ground wire that connects to terminal 5 of the engine switch, when not energized, it grounds the
ignition coil. Engine switch to be left in the OFF position.
The GSCM-mini-P’s terminal #6 is connected to terminal #3 (+12vdc) and to Samlex’s normally open relay contact, and the
common contact wires back to terminal #5 on the GSCM-mini-P. The generators AC output is wired to terminals # 9 & 10
providing the run feedback signal. An optional Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 6 GSCM-mini-P opion#2.
If a battery tender/charger is used, the engine switch should be left in the ON position and the C2 control relay is not used.
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800.261.3602 15 Revised 02/21
GSCM-mini-P Westinghouse Model # WGen7500DF & Outback Inverter
The GSCM-mini-P’s K1 relay contact wire in parallel with the generators Start/Stop push button. It’s K2 relay contact wires to
engine switch terminal 1 & 2 and a control relay (C2) terminals 85 & 86, C2’s normally closed (87a) and common (30) tabs,
wires in series with the ground wire that connects to terminal 5 of the engine switch, when not energized, it grounds the
ignition coil. Engine switch to be left in the OFF position.
The GSCM-mini-P’s terminal #6 is connected to terminal #3 (+12vdc) and Outback’s switched 12vdc maintained start/run
signal is wired to the GSCM-mini-P’s manual start input. Outback’s AUX- wires to terminal #7and AUX+ wires to terminal #5
on the GSCM-mini-P. The generators AC output is wired to terminals # 9 & 10 providing the run feedback signal. An optional
Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Outback’s switched 12vdc two wire signal (maintained run signal) and provides a one second start
/stop pulse as outlined on page 6 GSCM-mini-P opion#2.
If a battery tender/charger is used, the engine switch should be left in the ON position and the C2 control relay is not used.
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800.261.3602 16 Revised 02/21
GSCM-mini-P Westinghouse Model # WGen9500DF & Samlex Inverter
Wires to the Remote/ATS connector
The GSCM-mini-P uses the generator’s Remote/ATS connector for all connections to the generator. The GSCM-mini-P’s
power, relay and run feedback connections us the ATS connector as shown above. The generators engine switch is left in the
ON position. This allows the GSCM-mini-P to start and stop the generator without an additional control relay. A battery
tender/charger is used to keep the battery from discharging due to the engine switch being left on 24/7.
The GSCM-mini-P’s terminal #6 is connected to terminal #3 (+12vdc) and to Samlex’s normally open relay contact, and the
common contact wires back to terminal #5 on the GSCM-mini-P. The generators DC output is wired to terminals # 7 & 8
providing the run feedback signal. An optional Battery tender/charger is not needed for this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 6 GSCM-mini-P opion#2.
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Circuit Board Division
800.261.3602 17 Revised 02/21
GSCM-mini-P Duramax Model # XP13000EH & Samlex Inverter
The GSCM-mini-P’s K1 relay contact wire in parallel with the generators Start/Stop push button. The mini-P’s K2 relay contact
wires to a control relay that bypasses the generators power switch. The GSCM-mini-P’s terminal 15 wires to one side of the
relay coil (85) the other side of the coil (86) connects to the normally open contact (87) and to the white wire that connects to
the power switch and the starter motor. The relay contact common (30) connects to the ECU ‘s white wire that connects to
the switch. The generators power switch should remain in the OFF position.
The GSCM-mini-P’s terminal #6 is not connected to either terminal #3 or #7. Terminal 3 (+12vdc) is connected to Samlex’s
normally open relay contact, and the common contact wires back to terminal #5 on the GSCM-mini-P. The generators AC
output is wired to terminals # 9 & 10 providing the run feedback signal. An optional Battery tender/charger is not needed for
this option.
The GSCM-mini-P accepts Samlex’s two wire relay contact (maintained run signal) and provides a one second start /stop pulse
as outlined on page 7 GSCM-mini-P opion#3.
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Circuit Board Division
800.261.3602 18 Revised 02/21
GSCM-mini 60Hz Limited Warranty
Atkinson Electronics, Inc. gives this express warranty (along with extended warranty endorsements, where applicable) in lieu of
all other warranties, express or implied, including (without limitation), warranties of merchantability and fitness for a particular
purpose. This constitutes Atkinson Electronics, Inc.'s sole warranty and obligation with regard to our products as well as the
Customer's sole remedy.
Atkinson Electronics, Inc. expressly disclaims all liability and responsibility for any special, indirect or consequential damages or
any further loss of any kind whatsoever resulting from the use of our product. The Customer's sole and exclusive remedy and
the limit of Atkinson Electronics, Inc.'s liability for any loss whatsoever, shall not exceed the purchase price paid by the Customer
for the product to which a claim is made.
Countries or States that do not allow limitations of incidental or consequential damages or on how long an implied warranty
lasts, the above limitations may not apply to you. This warranty gives you specific legal rights and you may also have other rights
which vary from State to State or Country to Country.
All products manufactured by Atkinson Electronics, Inc. are warranted to be free from defects in material and workmanship in
accordance with and subject to the following terms and conditions:
1. This warranty is limited to the original customer only. It cannot be transferred or assigned to third parties unless the
intent to transfer to a third party is expressly indicated in a purchase order and/or warranty processing arrangements
have been agreed upon in writing by Atkinson Electronics, Inc.
2. Atkinson Electronics, Inc. will correct any defects in material or workmanship which appear within two (2) years from
the date of shipment by Atkinson Electronics, Inc. (or its authorized distributors) to the original Customer. Atkinson
Electronics, Inc. will repair or replace, at our option, any defective products, provided that our inspection discloses that
such defects developed under normal and proper use. This warranty does not extend to goods subjected to misuse,
neglect, accident or improper installation, or to maintenance or repair of products which have been altered or repaired
by anyone except Atkinson Electronics, Inc., unless otherwise stated in writing. Atkinson Electronics, Inc. will correct
any defects in material or workmanship of OEM products (designated as such in our catalog or web site) which appear
within two (2) years from the product date code or from the factory invoice date, whichever is later.
3. An appropriate charge (25% of product list price) may be made for testing, repairs, replacement and shipping for a
returned product which is not defective or found to be defective as the result of improper use, maintenance or neglect.
4. Atkinson Electronics, Inc. will not accept responsibility for any invoiced goods or services that are not covered by an
Atkinson Electronics, Inc. written purchase order. Under no circumstances does Atkinson Electronics, Inc. agree to pay
for labor or other related expenses associated with the troubleshooting and/or repair of our product without prior
specific written authorization.
5. Information in our descriptive literature is based on product specifications that are current at the time of publication.
Product specifications, design and descriptive literature are subject to change as improvements are introduced. Although we
announce changes as they occur, we cannot guarantee notification to every Customer. Atkinson Electronics, Inc. warrants
delivered products to conform to the most current specifications, design and descriptive literature. This warranty policy may
be expanded or limited, for particular categories of products or customers, by information sheets published as deemed
appropriate by Atkinson Electronics, Inc.
Table of contents
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