Appendix A. Miscellaneous
Appendix A. Miscellaneous
A.1 Console port pin assignment
The console port on the FMUX04 serves two purposes; it provides the RS-232
communication interface for terminal configuration and also contains one set of relay contacts
for alarm.
Pin Signal Description Direction Remark
1
2 TD Transmit Data IN Towards FMUX04
3 RD Receive Data OUT From FMUX04
4 NO Relay Normally open Closed if power fail
5 SG Signal Ground
6 COM Relay Common
7 CTS Clear To Send OUT From FMUX04
8 RTS Request To Send IN Towards FMUX04
9 NC Relay Normally closed Closed if no alarm
A.2 Alarm Relay Connection Detail
The following are examples of wiring audio or visual alarms to the console/alarm relay DB9F
connector.
Contact Ratings:
1A @ 30VDC
0.5A @ 125VAC
0.25A @ 250VAC
500VAC Max.
56
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