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GSCM-mini-d Relay Option 1

The GSCM-mini-d accepts Outback's 2 wire switched 12VDC start/ run signal or a dry contact, like Samlex, Trace and others, to

produces a 3 or 4 wire start/ stop signal for most gas, diesel, and propane generators. Using the generators remote port and

remote pilot lamp (PL) signal, if available, can make for a quick and easy instillation. Some inverter style generators, like

Yamaha and Honda, do not produce an AC output until the generator is up to full speed which may cause the GSCM to over

crank the starter. Using the PL signal eliminates this issue. The PL signal or 120/240VAC provides feedback telling the GSCM

when to stop cranking the starter 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. The generators

combination switch should be left in the remote position for the GSCM-mini to auto start the generator. The starting

sequence is as follows:

1. The start LED blinks once every 5 seconds to indicate that the GSCM-mini-d is in a ready mode. When a manual signal

is received, the start LED lights continuously. After a 2 second delay, the K2 relay closes for 10 seconds then opens, the

K1 relay closes to crank the starter and remains closed until either the generator starts or the maximum cranking time

period of 20 seconds is reached.

2. If the generator fails to start during the 20 seconds cranking period, the K1 relay opens for a resting period of 40

seconds. At the end of the period, the K2 relay again energizes for 10 seconds and de-energizes then, K1 relay closes

again, cranking the starter until the maximum cranking time is reached or the generator starts.

3. If the generator fails to start after 3 cranking attempts with the associated resting periods, the K2 relay then closes for

5 seconds to ensure the generator is not running, 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 4). This clears the lockout condition, and the GSCM-mini re-enters ready mode with the

start LED blinking every 5 seconds.

4. When the generator starts, the K1 relay immediately opens, stopping the cranking. 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).

The GSCM-mini indicates that it has received either signal by turning on the run LED.

5. If the generator starts but shuts down after a few seconds due to a fuel problem, etc., the start sequence will revert

to the 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.

6. When a run condition is detected, the GSCM-mini turns on the run LED and transistor output (remote run lamp

terminal 11). If an AC signal was detected to disconnect the starter, the GSCM-mini will begin a 60 second generator

stabilization period before it begins monitoring the AC Hz signal for over/under Hz condition, if enabled (terminal 8 is

grounded).

7. 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 blinks the generator Hz LED for an under Hz condition,

after 60 seconds the run LED turns off, K2 relay energizes for 5 seconds, and fault LED turns on and the generator Hz

LED blinks four times every two seconds. The GSCM-mini enters a fault shutdown lockout condition and must be

powered down to reset the fault lockout.

8. 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 fuel.

www.atkinsonelectronics.com

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Momentary Starting Sequence

Circuit Board Division

Revised 11/2020