Pump Control Board - MultiTrode MultiSmart Installation & Operation Manual

7.2.6 Contactor Auxiliary Fault
If the contactor auxiliary is wired in, the pump status is displayed differently for when a pump is called to run.
The contactor auxiliary is used to provide feedback to the MultiSmart as to when the contactor is closed and
the pump is actually running. As soon as the pump running command is sent, the MultiSmart displays the
status of the pump as Request to Run, and when the contactor closes the status is updated to Running. If
the contactor takes too long to close or fails to close at all, the preset delay will expire and a pump fault is
displayed, but the pump is not faulted. As per all faults, this can be modified to fault the pump thereby calling
the next pump to run.

7.3 Pump Control Board

The pump control I/O board monitors mains voltage and provides digital and analog I/O. Level sensing can
be from a MultiTrode conductive probe, or any 4-20mA device (e.g. pressure transducer or ultrasonic).
Pump faults can be contact closures or pump specific inputs such as seal, PTC thermistor, or Flygt FLS and
CLS. Digital outputs drive the pump contactors.
7.3.1 Mains Voltage Monitoring
For voltage monitoring to work, connect the main supply to the pump control I/O board. To configure voltage
monitoring and protection see Section 18. MultiSmart also supports single phase AC power supplies.
Figure 39 – Connecting Mains Supply to MultiSmart for Monitoring and Protection Purposes.
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MultiSmart Installation & Operation Manual
MultiSmart_IO_Manual_R20