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2.3 Alarm Connection
2.3.1 Alarm Port
The alarm port is shown as below. See Figure 2-5. The following figure is based on the 78 series.
Icon
1, 2
NO C
＋12V
Note
Different models support different alarm input ports. Please refer to the specifications sheet for
detailed information.
Slight differences may be found on the alarm port layout.
2.3.2 Alarm input port
Connect the positive end (+) of the alarm input device to the alarm input port (ALARM IN 1~2) of the NVR.
Connect the negative end (-) of the alarm input device to the ground end (
Note
When connecting the ground port of the alarm device to the NVR, you can use any of the GND ports
(
).
When there is peripheral power supplying the alarm device, ensure it is grounded on the NVR.
Figure 2-5
Function
ALARM1, ALARM2. The alarm becomes activated in the
low level.
NO activation output. (On-off button).
Rated current output. Current is 500mA.
GND
+ Alarm -
Device
Figure 2-6
) of the NVR.
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