SELCO A/S M2500 Installation Manual
Revision: 23-04-2012 Page 24
5.5.2 Run/ Stop Solenoid (terminal 66 and 67)
This output can be configured for control of the fuel valve (run solenoid) or stop solenoid.
Output configured for control of stop solenoid
In this case terminals 66 and 67 are the output for control of the stop solenoid. This output will be
activated for the stop procedure until the stop time has expired (energized to stop) or (in case
magnetic pick up is used for speed detection) until the engine speed is down to 10rpm (value
depending on what is practical), both for normal stops and shutdowns.
The relay is normally de-energized. This output includes cable monitoring for the stop solenoid.
Note:
The RUN/STOP solenoid 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 stop
solenoid could be activated by the cable monitoring circuit.
This is especially important in case the stop solenoid is not activated directly by the M2500 output
but by an intermediate relay, that typically requires a much lower current to activate than the stop
solenoid.
The cable monitoring on this output can be disabled in the configuration, however the 5mA limit
still applies.
In case the connection to the stop solenoid is lost and cable monitoring is enabled an alarm will be
activated.
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