Users Manual Part 1

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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 see the following relay specifications for
detailed information.
A/B cable of the RS-485 is for the A/B cable connection of the speed PTZ.
2.3.4 Alarm Relay Specifications
Table 2-42 Alarm relay specifications
Model: JRC
-27F
Material of the touch
Silver
Rating (Resistance
Load)
Rated switch capacity
30 VDC 2 A, 125 VAC 1 A
Maximum switch power
125 VAC, 160 W
Maximum switch voltage
250 VAC, 220 VDC
Maximum switch currency
1 A
Insulation
Between touches with same
polarity
1000 VAC 1 minute
Between touches with different
polarity
1000 VAC 1 minute
Between touch and winding
1000 VAC 1 minute
Surge voltage
Between touches with same
polarity
1500 V (10×160 μs)
Length of open time
3 ms
max
Length of close time
3 ms max
Longevity
Mechanical
50 × 106 MIN (3 Hz)
Electrical
200 × 103 MIN (0.5 Hz)
Temperature
-
40 °C to +70 °C
2.4 Two-way Talk
2.4.1 Device-end to PC-end
Step 1 Connect the speaker or the pickup to the first audio input port on the device rear panel.