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13
Figure 2-6
Note
There are two alarm input types: NO/NC.
When connect the ground port of the alarm device to the NVR, you can use any of the GND
ports (
).
Connect the NC port of the alarm device to the alarm input port (ALARM) of the NVR.
When there is peripheral power supplying for the alarm device, please make sure This is
earthed with the NVR.
2.6.3 Alarm input and output port
There is peripheral power supplying for the external alarm device.
In case overload may result in NVR damage, please refer to the following relay specifications
for detailed information.
A/B cable of the RS485 is for the A/B cable connection of the speed PTZ.
2.6.4 Alarm relay specifications
Material of the
touch
Silver
Rating
（
Resistance
Load
）
Rated switch capacity
30VDC 2A, 125VAC 1A
Maximum switch power
125VA 160W
Maximum switch voltage
250VAC, 220VDC
Maximum switch currency
1A
Insulation
Between touches with same
polarity
1000VAC 1minute
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