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21
Figure 2-23
Please refer to the following sheet for detailed information.
Name
Pin Introduction
1
~
8
Alarm input 1
~
Alarm input 8
9
GND
10/11
Alarm output 1
12/13
Alarm output 2
14
GND
15
Controllable 12V output
16
GND
17/18
RS485 AB cable
2.7.2
Alarm Input Port
Please refer to the following sheet for more information. See Figure 2-24.
Normal open or Normal close type.
Please parallel connect COM end and COM end of the alarm detector (Provide external
power to the alarm detector).
Please parallel connect the Ground of the NVR and the ground of the alarm detector.
Please connect the NC port of the alarm sensor to the NVR alarm input(ALARM)
Use the same ground with that of NVR if you use external power to the alarm device.