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The control assembly is provided with the alarm relay outputs, alarm silence push-button and audible alarm
pre-wired to aid in assembly. The pre-installed jumpers combine alarm outputs one and two (for
temperature and power failure) together so that only a single connection is required in order to activate the
external alarm relays.
One terminal of the push-button is pre-wired to the alarm outputs, so that only a single connection must be
made to the alarm silence relay. The audible alarm is pre-wired to the negative of the power supply
terminals as well as one terminal of the alarm 3 output (not used). This provides an easy termination point
for the field wiring required to active the audible alarm.
2.3.1 Main Power (Battery Backup) and Control Connections
The FDC C42 control unit was designed to use 12VDC power for its main power supply. The following
connection diagram is an example for the MEAN WELL DRC-40A power supply with built in battery charger
(UPS function).
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