Hydrotech MP Series PULSAtron - Manual (Page 14)

14
RELAY OFF
In all control options the relay remains open at all times.
STOP FUNCTION
In all control options the relay is normally open and closes while the Stop Function is activated through the stop
port.
CURRENT SIGNAL LOSS
In any Current Signal control option, the relay is normally open and closes while the Signal Loss alarm is in effect.
FULL COUNT
In the Stroke Counting control option, the relay is normally open and closes while the Full Count alarm is in effect.
PULSE OVERFLOW
In any External Pulse control option with Pulse Storage, the relay is normally open and closes while the Pulse
Overflow alarm is in effect.
REPEAT STROKES
In all control options, the relay is normally open and closes momentarily during each stroke of the pump. If the
pump is equipped with a 24 VDC signal relay output, this function may be used to pace another externally paced
pump.
CIRCUIT FAILURE
At all times, the relay is normally open and closes while the Circuit Failure alarm is in effect. The numbers which
flash alternately with the alarm signal are for failure diagnosis at the factory.
ALARMS
Alarms are distinguished by a fully flashing display.
CIRCUIT FAILURE
At all times, pumping is disabled and the pump will no longer operate until repaired.
SIGNAL LOSS
In any Current Signal option, the Signal Loss alarm is triggered whenever the signal drops below approximately
2 mA for several seconds. The pump stops operating during the loss of signal condition and resumes normal
operation when the signal is restored. This includes the 20-4 mA option, in which a low current (4 mA) signal normally
calls for full pump output in order to prevent overfeeding in the event of signal loss.
FULL COUNT
In the Stroke Counting control option, when the preset number of strokes has been delivered and the pump stops,
the Full Count alarm is triggered.