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Figure 3-1 Alarm Input and Output of HSVR-04 (Left) and HSVR-16
(Right)
Parameter Grounding Alarm
Ground line
Alarm Input
HSVR-04: 1, 2, 3, 4 become valid in low voltage; 5, 6, 7, 8 are not
effective.
HSVR-16: 1-16 become valid in low voltage.
Relay Output NO C 1-NO C, 2-NO C, 3-NO C Three Normal Open activation outputs.
RS-485 A/B
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.
Alarm Input Port
4-ch (HSVR-04) / 16-ch (HSVR-16)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.