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3. Please make sure the front-end device has soundly earthed.
Improper grounding may result in chip damage.
4. Alarm input type
NO/NC.
3.4.1
Alarm Input and Output Details
Alarm input and output interface is shown as in Figure 3-8.
Figure 3-8
Please refer to the following sheet for detailed information.
Name
Pin Introduction
1
~
9
Alarm input 1
~
Alarm input 9.
Alarm 1-Alarm 7 is the local alarm input.
Alarm 8/9 is pulse input.
C, NO
NO/C of alarm output on-off signal
L, H
CAN port.
Alarm GND
CTRL 12V
Controllable 12V
A, B
485 port. Connect to the PTZ camera.
3.4.2
Alarm Input Port
Please refer to the following sheet for more information. See Figure 3-9.
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 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.