Alarm Input Port; Figure 3- 7 Alarm Input - Honeywell CADVR-04D User Manual

485 A/B

Alarm Input Port

Earth cable.
485 communication port. They are used to control devices such as
PTZ. Please parallel connect 120TΩ between A/B cables if there
are too many PTZ decoders.
Please refer to the following sheet for more information.
Normal open or Normal close type.
Please parallel connect COM end and GND end of the alarm
detector (Provide external power to the alarm detector).
Please parallel connect the Ground of the DVR and the ground of
the alarm detector.
Please connect the NC port of the alarm sensor to the DVR alarm
input(ALARM)
Use the same ground with that of DVR if you use external power to
the alarm device.

Figure 3- 7 Alarm Input

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