C634M-D (12/04) 69
CONNECTING AN ALARM UNIT
You can connect a maximum of four alarm units to a recorder.
To connect a CM9760-ALM to a DX9200 recorder using RS-232 communication:
1. Connect a null modem cable from the alarm unit’s RS-232 port to the recorder’s COM 1 or COM 2 port.
2. Set the DIP switches on the alarm unit for RS-232 communication. Refer to the CM9760-ALM Installation/Operation
manual.
If using RS-422 communication:
1. Connect a cable from the alarm unit’s RJ-45 COM IN port to the recorder’s COM 1 or COM 2 port via an RS-232 to RS-422 converter.
2. Set the DIP switches on the alarm unit for RS-422 communication. Refer to the CM9760-ALM Installation/Operation manual.
Figure 90. Connecting a CM9760-ALM
CM9760-ALM
RS-232 TO RS-422
CONVERTER
NULL MODEM CABLE
RECORDER
COM 1
COM 2