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3.7.1 Alarm Input and Output Details
You can refer to the following sheet and
X288H288H288H
Figure 3-6
X
for alarm input and output information.
Figure 3-6
Parameter
Grounding Alarm
Ground line
Alarm Input
1, 2, …, 8. It becomes valid in low voltage.
1-NO C
，
2-NO C
，
3-NO C
Three NO activation outputs.
Relay Output
1,2,3,4: NO and C(Normally Open and Com)
5: NO,C and NC(Normally Open, Com, Normally Closed)
6: Ctrl 12V(This is used for reset the senor)
485 A/B
485 communication port. They are used to control devices such as
PTZ. Please parallel connect 120
T
Ω between A/B cables if there are
too many PTZ decoders.
T
3.7.2 Alarm Input Port
Please refer to the following sheet for more information.
4/8/16-ch grounding alarm inputs. (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
AB Connection
port
