User's Manual
59
●
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
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
Summary of Contents for NVR41-4KS2 Series
Page 1: ...Dahua Network Video Recorder User s Manual ZHEJIANG DAHUA VISION TECHNOLOGY CO LTD V1 1 0 ...
Page 74: ...User s Manual 58 Figure 2 79 Alarm input port Figure 2 80 Alarm input port ...
Page 101: ...User s Manual 85 Figure 3 41 Step 9 Secure the HDD bracket and put the top cover back ...
Page 132: ...User s Manual 116 Figure 4 19 Modify IP Step 3 Set parameters See Table 4 5 ...
Page 147: ...User s Manual 131 Figure 4 29 Period Step 3 Set record type See Figure 4 30 ...
Page 452: ...User s Manual ...
