1.3
Alarm Connections
1.3.1
Alarm Port
Please refer to the following figure for detailed information about the alarm port.
Figure 1-3
No. ID
Description
1
1-4, 1-8 or 1-16
Alarm Inputs (active low)
2
CTRL 12V
Control power output. For an external alarm, close the device power to
cancel the alarm.
3
+12V
External power input. Peripheral equipment must p12V power
(< 1A).
4
Earth ground
5
NO1/C1 – NO5/C5 Activation Outputs 1-4, normally open (on/off switch)
6
C5/NC5
Activation Output 5, normally closed (on/off switch)
7
T+, T- , R+, R-
Four-wire double duplex RS485 port
T+ T-: output wire
R+ R-: input wire
8
A/B
485 communication port: controls the PTZ decoder
1.3.2
Alarm Input Port
•
Connect in parallel the COM end and GND end of the alarm detector (providing external
power to the alarm detector)
•
Connect in parallel the Ground of the DVR and the ground of the alarm detector
•
Connect the NC port of the alarm sensor to the DVR alarm input (ALARM)
Figure 1-4
Note:
When your alarm input device is using external power, make sure the device and the DVR
have the same ground. Also, make sure that there is power to the external alarm device.
1
5
6
3 4
7
8
2
DVR1604HF-U-E Hybrid DVR User Guide
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