User's Manual
59
●
There are two alarm input types: NO/NC.
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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 it is earthed
with the NVR.
2.3.3 Alarm Output Port
●
There is peripheral power supplying for the external alarm device.
●
In case overload might 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.
2.3.4 Alarm Relay Specifications
Table 2-40 Alarm relay specifications
Model: JRC-27F
Material of the touch Silver
Rating (Resistance
Load)
Rated switch capacity 30V DC 2A, 125V AC 1A
Maximum switch power 125V AC, 160W
Maximum switch voltage 250V AC, 220VDC
Maximum switch currency 1A
Insulation
Between touches with same
polarity
1000V AC 1minute
Between touches with different
polarity
1000V AC 1minute
Between touch and winding 1000V AC 1minute
Surge voltage
Between touches with same
polarity
1500V (10×160us)
Length of open time 3ms max
Length of close time 3ms max
Longevity
Mechanical 50×106 MIN (3Hz)
Electrical 200×103 MIN (0.5Hz)
Temperature -40°C to +70°C
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