24
Network Controllers Manual
Indicators
LEDs
Four seven-segment LED displays provide system status
CPU Fail LED on associated power supply indicates CM2N CPU
status.
LED’s on the communication cards indicate CM2N communication
status
Controls
Switches
Switches on the CM2N are only operational when the CM2N looses
communications with the CM1N / FCC head end.
Alarm Silence - Activates action 9004. Pressing Alarm Silence twice
initiates drill/all call.
Trouble Silence - Silences local trouble buzzer
CM2N Reset - Accomplished by operating BOTH the alarm silence
and the trouble silence switches simultaneously. Activates action 9002.
Buzzer
The system buzzer sounds during system trouble and pulses on
unacknowledged messages. Located on power supply PS4B or PS8B.
System Configuration
Configuration is dependent upon system requirements and design. All
CM2Ns have a CM2N CPU card (P/N 130073/1) installed in P4.
System communication specifications govern the type of
communications card installed in connector P3 of the CM2N. Wiring to
CM2N terminal strip TB1 is dependent on the type of communications
card installed, and may be found on the COMM-3 RS-485/RS-232C
communications card (P/N 130080) or the COMM-3S serial
communications card (P/N 130144).
Two option cards may be installed in the CM2N in connectors P5 and
P6. Details on option card programming and termination’s of CM2N
terminal strips TB2, TB3, and TB4 may be found on each modules
technical data sheet.
Programming Notes
The CM2N panel configuration menu (menu selection “3”) in the data
entry program should be set as “supervised” power supply. Additional
control modules should be set as “unsupervised” power supply when
connected to the same power supply as the CM1N or another CM2N.
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