815046 Mercury SCREW

Spare Inputs
The spare inputs are referred to as SP1, SP2, SP3, and SP4. The spare inputs are accessed on the terminal strip within the control panel on the rear wall. The terminations at the terminal strip for the spare inputs are listed below.
SP1 Shown as SW1
SP2 Shown as SW2
SP3 Shown as SW3
SP4 Shown as SW4The active input state, response taken and time delay for each spare input is programmable. The GSC+ responds to the active state of an input and the response can be delayed. The setpoints SP01 through SP12 are used for the programming of the spare inputs. Table 1 describes each of the setpoints.
Illustration 1 g00525961
Typical Active High Input Configuration For Spare Input 1 (SP1)
Illustration 2 g00525969
Typical Active Low Input Configuration For Spare Input 1 (SP1)Setpoints SP01, SP04, SP07 and SP10 are used for programming the active input state of the spare inputs. Table 1 describes each of the setpoints.Note: If an input is left floating, the internal circuitry of the GSC+ pulls the input high and the GSC+ responds accordingly. An example of a floating input is an open switch.The GSC+ must be programmed for a response to an active spare fault. The GSC+ responds by treating the condition as either a fault shutdown or a fault alarm. Setpoints SP02, SP05, SP08 and SP11 are used for the programming of the response. Table 1 describes each of the setpoints.Note: Spare faults that are programmed to shutdown are ignored by the GSC+ when engine speed is less than crank termination speed.The GSC+ must be programmed for the amount of time to delay the response to a spare fault (active input). After a spare fault occurs, the GSC+ does not respond until the time delay has elapsed. Indicators are not activated and codes are not shown. Engine operation does not change. Setpoints SP03, SP06, SP09 and SP12 are used for the programming of the time delay. The time delay is selectable from 0 to 250 seconds. Table 1 describes the setpoints.Alarm Mode Sequence Of Operation - When a fault occurs in a spare input and the fault is programmed as an alarm fault, the GSC+ will respond in the following manner:Shutdown Mode Sequence Of Operation - The following sequence occurs when a fault occurs in a spare input (input active) and the fault is programmed as a shutdown fault.
The GSC+ waits for the time delay.
The fault shutdown indicator FLASHES.
The corresponding code SP1, SP2, SP3 or SP4 is immediately shown on the upper display of the GSC+.
The engine is shutdown or the engine is disabled from starting.The fault shutdown indicator remains FLASHING and the spare fault code remains shown until the engine control switch (ECS) is turned to OFF/RESET. After the ECS is turned to OFF/RESET and after the cause of the spare fault is corrected, the engine is able to start and the engine is able to run.Note: Spare faults are not logged into the GSC+ fault log.Note: If you do not want to use the spare inputs, program the spare inputs for a LOW active state. Connect nothing to the spare input wiring.Spare Indicators
The spare indicators are located on the face of the GSC+. The spare indicators are Spare 1, Spare 2, and Spare 3. The spare indicators are programmable. A large selection of trigger conditions is available to activate the spare indicators. Setpoints SP17, SP18, and SP19 are used for the programming of the trigger condition. Table 1 describes all of the setpoints.Spare Output
Illustration 3 g00307942
Typical Active Low Configuration For Spare Output
Illustration 4 g00308023
Typical Active High Configuration For Spare OutputThe spare output responds to a selected trigger condition. The response and the trigger condition are programmable. The spare output is accessed on the terminal strip in the customer connection box on the side of the control panel. The spare output is marked as "SPARE" on the auxiliary terminal strip.The GSC+ must be programmed to accept a high input or a low input for the active state of the spare output. An active low state means that the output is pulled to battery negative when the output is active. The output draws approximately 100 mA when the output is in the low state. An active high state means that the output will be allowed to float high. This is approximately 5.0 DCV when no devices are connected to the spare output. When the spare output is in the high state, the spare output is floating. The spare output is capable of driving high impedance logic circuits only. High impedance logic circuits are the circuits with the 36000 ohm minimum resistance. When the spare output is in the high state, the spare output will not drive low impedance loads such as relays. Setpoint SP13 is used for the programming of the active state of the spare output. Table 1 describes the setpoints.The GSC+ must be programmed to accept the condition that triggers the spare output to the active state. A large selection of trigger conditions is available to activate the spare output. Setpoint SP14 is used for the programming of the trigger condition. Table 1 describes the setpoints.Note: The spare output is usually used in order to activate the circuit breaker shunt trip coil during the engine cooldown.Note: The GSC+ diagnoses a fault in the spare output circuit. See Testing And Adjusting, "CID 334 Spare Output".Programmable Spare Relay Outputs
Illustration 5 g00633869
Programmable Spare Relay (PSR)The programmable spare relay outputs respond to a selected trigger condition. The response and the trigger condition are programmable. The programmable spare relay (K8) is located in the relay module on the rear of the GSC+. RM-25 is the termination for the programmable spare relay (PSR) that is normally open. RM-26 is the termination for PSR which is normally closed.The GSC+ must be programmed to make the active state high or low. In a active state, the normally open contacts will close and the normally closed contacts will open. Setpoint SP15 is used for the programming of the active state of the programmable spare relay output. The setpoint is