Alarm Output Port; Alarm Relay Specifications - Dahua L Series User Manual

● 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 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

Model: JRC-27F
Material of the touch
Rating (Resistance
Load)
Insulation
Surge voltage
Length of open time
Length of close time
Longevity
Temperature
Table 2-41 Alarm relay specifications
Silver
Rated switch capacity
Maximum switch power
Maximum switch voltage
Maximum switch currency
Between touches with same
polarity
Between touches with different
polarity
Between touch and winding
Between touches with same
polarity
3ms max
3ms max
Mechanical
Electrical
-40°C to +70°C
60
User's Manual
30V DC 2A, 125V AC 1A
125V AC, 160W
250V AC, 220VDC
1A
1000V AC 1minute
1000V AC 1minute
1000V AC 1minute
1500V (10×160us)
50×106 MIN (3Hz)
200×103 MIN (0.5Hz)