TERMINAL DESCRIPTION
Term #
Description
1 Fuel Output provides 40A maximum. Fuel Output closes to +12/24VDC when start signal is received, and opens when either an engine failure occurs or when Cool Down period has ended.
2 , 3 Auto Terminals. Main +Battery power connection to controller. These terminals are internally connected together on GSC300 controller.
4 Crank Output provides 40A maximum. Crank Output closes to +12/24VDC during cranking, and opens when the engine has started, or during Crank Rest.
5 , 6 Main Battery Ground connection for the controller module. A good ground connection, directly from
the battery, is required for proper operation. These terminals are internally connected together on
GSC300 controller.
7 , 8 Preheat/ETS Output provides a set of dry contacts between terminals #7 and #8. When this output is energized terminals #7 and #8 are connected together. When output is OFF terminals #7 and #8 have no connection.
9 , 10 Speed 1. Speed Signal Input for Crank Disconnect, Engine Run, and Overspeed sensing. 300VAC max input voltage. Speed sensing input terminals (T#9, 10) do not have polarity sensitivity therefore the AC generator output leads can be connected in any polarity configuration. Do not exceed 300VAC on speed
sensing input terminals.
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12
Overcrank Annunciation Output closes to +12/24VDC on Overcrank Failure. 300mA max.
Overspeed Annunciation Output closes to +12/24VDC on Overspeed Failure. 300mA max.
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14
15
16
17
18
19
20
21
22
High Temp Output closes to +12/24VDC upon High Temp Failure. 300mA max.
Low Oil Output closes to +12/24VDC upon Low Oil Failure. 300mA max.
Low Battery Output closes to +12/24VDC on Low Battery Condition. 300mA max.
Engine Run Output closes to +12/24VDC on Engine Run Condition. 300mA max.
Not In Auto Output closes to +12/24VDC when unit is not in auto. 300mA max.
General Failure Output closes to +12/24VDC on a General Failure. 300mA max.
Start Stop Input. Apply +12/24VDC to this terminal while unit is in Auto Mode to start engine. Remove
+12/24VDC to stop engine or enter Cool-Down mode.
Low Oil Pressure sensor input. This sensor can be the resistive type (Sender) or can be the switch type.
The proper type of sensor must be selected during GSC300 controller programming. The sender or switch must be connected to ground for proper operation. If +Battery is connected to input terminal this can result in damaged to GSC300 controller. When using a sender, the proper sender manufacturer must be selected as each sender manufacturer’s characteristics are different; the sender failure set-point must also be selected. When using a switch NO or NC much be selected from the programming menu. NO refers to the state of the contacts during normal engine operation, therefore NO refers to normally open at normal engine run and close to ground on low oil pressure failure.
High Engine Temperature sensor input. This sensor can be the resistive type (Sender) or can be the switch type. The proper type of sensor must be selected during GSC300 controller programming. The sender or switch must be connected to ground for proper operation. If +Battery is connected to input terminal this can result in damaged to GSC300 controller. When using a sender, the proper sender manufacturer must be selected as each sender manufacturer’s characteristics are different; the sender failure set-point must also be selected. When using a switch the switch must be the NO type on normal engine run and close to ground on failure.
Fuel Level sensor or Auxiliary failure input. This sensor can be the resistive type (Sender) or can be the switch type. The proper type of sensor must be selected during GSC300 controller programming. The sender or switch must be connected to ground for proper operation. If +Battery is connected to input terminal this can result in damaged to GSC300 controller. When using a sender, the proper sender manufacturer must be selected as each sender manufacturer’s characteristics are different. When using a switch the switch must be the NO type on normal engine run and close to ground on failure.
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Operating & Installation Manual for the GSC300 Engine Controller
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Wiring Connection Diagram
Wiring Connections for the GSC300
CRANK
FUEL
Glow
Plug &
ETS
FUEL/AUXILLIARY SENDER/SWITCH
GENERATOR OUTPUT
UP TO 300VAC
TEMPERATURE SENDER/SWITCH
OIL PRESSURE SENDER/SWITCH
6
5
4
8
7
3
2
1
PRE-HEAT
RELAY
CRANK
RELAY
FUEL
RELAY
9 10
PROGRAMMING
CONNECTOR
PIN 1
18
17
16
15
14
22
21
20
19
13
12
11
MODE SWITCH
GENERAL FAILURE LAMP
NOT IN AUTO LAMP
ENGINE RUN LAMP
LOW BATT LAMP
LOW OIL LAMP
HIGH TEMP LAMP
OVERSPEED LAMP
OVERCRANK LAMP
(-) (+)
BATTERY
½ AMP FUSE
REMOTE START CONTACTS
Operating & Installation Manual for the GSC300 Engine Controller
12
Back Panel Layout
PRE-HEAT NO
PRE-HEAT COM
BATTERY GROUND
BATTERY GROUND
STARTER OUTPUT
BATTERY +
BATTERY +
FUEL OUTPUT
6
5
4
3
2
1
8
7
PRE-HEAT
RELAY
CRANK
RELAY
9 10
SPEED SIGNAL
INPUTS
FUEL
RELAY
PROGRAMMING
CONNECTOR
ON OFF
MODE SWITCH
Operating & Installation Manual for the GSC300 Engine Controller
22
AUX SWITCH INPUT
21
TEMP. SWITCH INPUT
20
OIL SWITCH INPUT
19
REMOTE START INPUT
18
GENERAL FAIL OUTPUT
17
NOT IN AUTO OUTPUT
16
ENGINE RUN OUTPUT
15
LOW BATTERY OUTPUT
14
LOW OIL OUTPUT
13
HIGH TEMP. OUTPUT
12
OVER-SPEED OUTPUT
11
OVER-CRANK OUTPUT
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CONTROLLER OVERVIEW
1. General Failure Conditions
2. Not In Auto
3. Low Battery Voltage Alarm
4. Oil Pressure Input
5. Coolant Temperature Input
6. Fuel Level/Auxiliary Input
7. Speed Signal Sensing
8. Adjustable Input Programming
1: GENERAL FAILURE CONDITIONS:
The following conditions can cause the GSC300 controller to shutdown the engine-generator system unexpectedly:
Auxiliary Failure (“XTR_FAIL”)
Extra failure is indicated by a flashing RED Low oil pressure LED
Low Oil Pressure
Low Oil pressure is indicated by a steady on RED Low oil pressure LED
High Coolant Temperature
High coolant temperature is indicated by a steady on RED High water temp LED
Overcrank
Overcrank failure is indicated by a steady on RED Overcrank LED
Overspeed indicated by a steady on RED Overspeed LED
Loss of Speed (“SPDLOSS”)
Loss of speed signal is indicated by a flashing RED Overspeed LED
The General Failure output annunciation is triggered during any of the above failure conditions and is rated
300mA Max.
2: NOT IN AUTO:
When the controller is in the OFF Mode, the NOT IN AUTO LED will illuminate and the NOT IN AUTO Output will be triggered. During this OFF mode Automatic engine starting is disabled. The
LCD display will read “OFF”, and the backlight on the LCD display will be off.
NOTE: + Battery must be permanently connected to the main power terminal for the NOT IN AUTO feature.
3: LOW BATTERY VOLTAGE ALARM:
When the battery voltage drops below the user defined set point which can be programmed between 7 and 35VDC, the engine controller displays a Low Battery
Condition. The Low battery warning Led will be illuminated at any time during OFF, AUTO and Manual run modes. The LCD display will indicate the message: “LOW_BATT”. The LOW battery warning will be disabled during failure conditions.
4: LOW OIL INPUT:
The Low Oil Input can be wired to a resistive sender or from a NO or NC type switch. NO / NC refers to the state of the contacts during normal engine operation (engine oil pressure ok).
When utilizing a resistive sender the display units are fixed in PSI by the PC programming interface, and a failure set-point must be selected from the programming menu.
Note: The oil input failure is disabled during the Oil Bypass time.
Operating & Installation Manual for the GSC300 Engine Controller
5: HIGH TEMPERATURE INPUT:
The high temperature input can be wired to a resistive sender or from a NO type switch. For proper operation while using a switch, the switch must be the NO type which closes to ground upon failure. When utilizing a resistive sender the display units are fixed in Fahrenheit by the
PC programming interface, and a failure set-point must be selected from the programming menu.
Note: The engine temperature failure is disabled during the Oil Bypass time.
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6: FUEL LEVEL/AUXILIARY INPUT:
The Fuel level/Aux input can be wired to a resistive sender or from a NO type switch. For proper operation while using a switch, the switch must be the NO type which closes to ground upon failure. If this input is used as a sender, no failure will be indicated. The sender option is solely for Fuel Level/Auxiliary Level Display on the LCD.
7: SPEED SIGNAL SENSITIVITY:
The controller will accept to a maximum of 300VAC, 60Hz from direct generator output for speed sensing.
The following values are minimal recommended voltages for speed signal sensing:
20Hz - .075V (75mV)
60HZ - .6V (600mV)
8: HOUR METER:
The controller displays a log of total accumulated generator running hours. Generator
Run times will be displayed on the controllers display screen. The display represents both hours and minutes in the form 123456:7. The last digit on the hour meter will represent the time in 1/10 of an hour. Please note that although the hour meter displays time in hours and minutes, it will record up to the nearest second. If the generator was operated for a 3 minute period and then stopped the running time is stored in permanent memory and then adding to the next running period. The same would be true if the controller were to enter a failure mode as the controller would permanently store the remaining time for the next running cycle.
Operating & Installation Manual for the GSC300 Engine Controller
LED LAYOUT
Front View of GSC300
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Operating & Installation Manual for the GSC300 Engine Controller
