Northern Lights OGSC300 Operator's Manual - page 9
OGSC300 08/12
3
2-1 WIRING GUIDELINES
1. DO NOT use wire smaller than 18 AWG as smaller wire has a tendency to crack and break over time.
2. IMPORTANT: The connections supplying DC power to the GSC300 panel should preferably run
directly from the battery posts with no splices or other connections. Avoid using chassis (aluminum or iron
engine parts), as return conductor for battery negative voltage. Copper wiring is recommended. Failure
to follow the above may result in erratic operation due to large voltage drops across wiring connections.
A small fuse should be placed at the battery terminal to provide 12 volts to the Remote Start Contacts to
ensure that a short along this line will not cause any damage.
3. DO NOT exceed the maximum rated current and voltage on each of the controller outputs. DO NOT
exceed 40A each for the Fuel Output, Crank Output or Preheat Output. DO NOT exceed 300mA individu-
ally, or 350mA combined, for the General Fault Output or Annunciation Outputs.
4. 40Amp relays are rated for resistive ratings. When driving such loads as starter solenoids you must
ensure proper de-rating of the relays. Consult factory for further details.
5. Engine Sensor type MUST be selected and programmed properly to GSC300 (switch or sender type).
Failure to do so may result in the controller not shutting down on true engine failure (Low oil pressure or
high engine temperature).
6. When installing engine sensors (oil pressure, engine temperature, fuel level) ensure the switches are
connected to ground circuit through the engine sensor. Damage will occur to controller unit if the
sensor
input terminals (Terminal #’s 20, 21 and 22) are connected to +Battery.
7. When using engine sensors that are the resistive type the proper manufacturer of the sender
MUST
be selected during programming. Failure to select the correct manufacturer type will cause inaccurate
readings as well as failure to protect the engine during a fault condition.
8. To verify the operation of engine controller outputs, measure voltage (i.e. meter in volts) when outputs
should be ON.
9. To verify the operation of the Preheat Output, measure the resistance between the Preheat terminals
when the Preheat Output is ON, it should read a closed circuit (i.e. zero ohms). When the output is OFF
there should be an open circuit between the terminals (very high resistance).
10. Speed sensing input terminals (Terminal #’s 9 and 10) do not have polarity sensitivity therefore the
AC generator output leads can be connected in any polarity confi guration to the controller speed sensing
terminals. Do not exceed 300VAC on speed sensing input terminals.