SELCO A/S M2500 Installation Manual
Revision: 23-04-2012 Page 25
Output configured for control of run solenoid (fuel valve)
In this case terminals 66 and 67 are a normally open contact for control of the fuel valve. This
output will be activated during start and operation of the engine (energized to run). For engine stop
the output will be de-activated. The relay is normally de-energized. This output includes cable
monitoring for the run solenoid.
Note:
Please note that this output can only be used with 24V DC. This can be either the same supply as for the
controller or a separate power supply.
Please observe correct polarity when connecting the fuel valve.
When deactivated there will be a current of 5mA on this output due to the cable monitoring circuit
inside the M2500.
Note:
The coil connected to this output must require a current > 5mA for activating. Otherwise the fuel valve
could be activated by the cable monitoring circuit.
This is especially important in case the fuel valve is not activated directly by the M2500 output but
by an intermediate relay, that typically requires a much lower current to activate than the fuel valve.
The cable monitoring on this output can be disabled in the configuration, however even then the
5mA limit still applies.
In case the connection to the fuel valve is lost and cable monitoring is enabled an alarm will be
activated.
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