Irc-3 And Fcc Field Wiring - EDWARDS SYSTEMS TECHNOLOGY CMDN Installation Operation & Maintenance

CMDN Manual
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[CMDN-011.CDR]
CMDN(-C) Flush Mount Enclosure

IRC-3 and FCC Field Wiring

The total length of the RS-485 communications loop used to connect
multiple annunciators cannot exceed 7,700 feet (2348 m). Wire
annunciators per the following figures.
Annunciator IRC-3 and FCC Terminal Connections
Terminal
1
2
3
4
5
6
7
8
9
10
For Style 4 (Class B) wiring, use only RS-485 Channel 0. For
Note:
Style 7 (Class A) wiring, use both RS-485 channels.
Function
+ 24 Vdc
24 Vdc Common
Earth Ground
RS-232, Rx In
RS-232, Tx Out
RS-232, Common
RS-485, Ch 0 (+)
RS-485, Ch 0 (-)
RS-485, Ch 1 (+)
RS-485, Ch 1 (-)
15