IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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If more than 7 languages are present in the controller, it is not possible to force languages with index higher
than 7 using these binary inputs.
The reaction on BI combination change is 1s delayed not to react on transient combinations if a rotary
selector switch is used.
Binary inputs – Status information
GCB feedback
Generator Circuit Breaker positive feedback input (closed if GCB is closed). This is a primary source for the
controller about the status of the GCB.
GCB fdb neg
Generator Circuit Breaker negative feedback input (closed if GCB is open). Additional signal, can be used if
both positive and negative feedback signals are available from the breaker.
Hint:
If both feedbacks are used and there is a mismatch between these signals, longer than 500 ms, a GCB fail
alarm is activated.
MCB feedback
Mains Circuit Breaker positive feedback input (closed if MCB is closed). This is a primary source for the
controller about the status of the MCB.
Hint:
The controller can only enable parallel in mains operation when MCB feedback input is closed.
MCB fdb neg
Mains Circuit Breaker negative feedback input (closed if MCB is open). Additional signal, can be used if both
positive and negative feedback signals are available from the breaker.
Hint:
If both feedbacks are used and there is a mismatch between these signals, longer than 500 ms, a MCB fail
alarm is activated.
NeutralCB fdb
Use this input to detect, whether the Neutral circuit breaker is open or closed. See also setpoint Neutral cont
and binary output Neutral CB C/O.
Binary outputs
Starter
The output is intended to energize the starter motor during start sequence. The output opens if
the Starting RPM level is reached or maximum time of cranking is exceeded.
Hint:
If setpoint Fuel solenoid = GAS ENGINE, the Starter output is active during Preventilation and Ventilation
states as well to clean the engine off the unburned gas.
Fuel solenoid
The output is intended to control the engine fuel valve. The setpoint Engine params: Fuel solenoid selects
the output behaviour – DIESEL or GAS ENGINE.
Stop solenoid
The output closes to activate the stop valve which interrupts the fuel input to the engine. The output is
always closed until the engine reaches 0 RPM and other “engine running” conditions disappear as well +
additional 5s.
The minimum time of activation is given by the Stop time setpoint, so even if all “engine running” conditions
would disappear before, the Stop solenoid stays closed for that time.
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