12
GA0383P02 Rev. C
Electrical Connections
Electrical connections are made through three knockouts provided at the top and bottom of
the GCM-A cabinet (Figure 4). The system power requirement is 115/230 VAC (+/- 10%),
50/60 Hz. The source of AC power should be reliable and not subject to severe transients.
Wiring and wire routing should be in accordance with Figure 4 so that noise generated from
the AC power and contacts does not interfere with the signals. If a circuit breaker is used, it
should be 10 amps. The ground wire should be 12 AWG with 25-amp capacity.
ALL WIRING MUST BE IN ACCORDANCE WITH LOCAL CODES AND PROFESSIONAL
PRACTICE.
Contacts
As shown in Figure 4, the GCM-A provides these relay contacts:
· Ambient Alarm Relay. Both a normally open and a normally closed contact (single pole,
double throw configuration) is provided and an alarm is signaled by an energized relay.
· Generator Alarm Relay. Both a normally open and a normally closed contact (single
pole, double throw configuration) is provided and an alarm is signaled by an energized
relay.
· Differential Alarm Relay. Both a normally open and a normally closed contact (single
pole, double throw configuration) is provided and an alarm is signaled by an energized
relay.
· Warning Relay. Both a normally open and a normally closed contact (single pole,
double throw configuration) is provided and a warning is signaled by an energized relay.
· Flow Trouble Relay. Both a normally open and a normally closed contact (single pole,
double throw configuration) is provided a flow rate problem is signaled by an energized
relay.
· System Trouble Relay. Both a normally open and a normally closed contact (single
pole, double throw configuration) is provided, and Trouble is signaled by a de-energized
relay.
Signals
· Ambient Output Level Signal. 4 to 20 mA signal (transmitter)
· Generator Output Level Signal. 4 to 20 mA signal (transmitter)
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