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Alarm Input and Output Details
Parameter
Alarm Input
Relay Output NO C
RS-485 A/B
Alarm Input Port
You can refer to the following sheet and
output information.
Figure 3-1 Alarm Input and Output of HD-DVR-1004, HD-DVR-1008
(Left) and HD-DVR-1016 (Right)
Grounding Alarm
Ground line
HD-DVR-1004: 1, 2, 3, 4 become valid in low voltage; 5, 6, 7, 8
are not effective.
HD-DVR-1008: 1-8 become valid in low voltage.
HD-DVR-1016: 1-16 become valid in low voltage.
1-NO C, 2-NO C, 3-NO C Three Normal Open activation outputs.
RS-485 communication port. They are used to control devices
such as PTZ. Please parallel connect 120Ω between A/B cables if
there are too many PTZ decoders.
4-ch (HD-DVR-1004)/8-ch (HD-DVR-1008)/16-ch (HD-DVR-1016)
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)
Honeywell
Figure 3-1
for alarm input and
21
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