Status Relay Contact Output - Nordson Mesa Fulfill Customer Product Manual

A-5
RetroFit Refill System with Nordson Level Sensor

Status Relay Contact Output

A form­C electromechanical relay contact output is available for to monitor
the fill system status. This relay provides a common (COM), normally closed
(NC), and normally open (NO) potential free contact. These contacts are
labeled COM, NC, and NO on the PCB and are located at terminal block
TB3.
If the fill system is working properly (powered, fill enabled, and no alarms
present) the COM contact will be connected to the NC contact and
disconnected from the NO contact. Any other system state will de­energize
the relay and change the output state.
The relay contacts are rated for 30 VDC maximum at 1 Amp maximum.
If a 24 VDC signal is desired instead of a potential free contact, connect 24
VDC to the COM contact and then use the NC and NO contacts. Use the NC
contact for a signal that supplies 24 VDC when the fill system is working
normally and the NO contact for a signal that supplies 24 VDC when a
problem with the fill system exists. See Figure A‐3.
TB3
Photo of TB3
Figure A‐3
Part 1121938_02
E 2013 Nordson Corporation