User's Manual
58
Figure 2-78 Alarm input port
● 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 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.
2.3.4 Alarm relay specifications
Table 2-35
Model: JRC-27F
Material of the touch
Silver
Rating (Resistance
Load)
Rated switch capacity
30VDC 2A, 125VAC 1A
Maximum switch power
125VA 160W
Summary of Contents for NVR41 series
Page 1: ...Dahua Network Video Recorder User s Manual ZHEJIANG DAHUA VISION TECHNOLOGY CO LTD V4 5 1...
Page 103: ...User s Manual 89 The following figure is for reference only Figure 3 51...
Page 122: ...User s Manual 108 Figure 4 21 Step 3 Set parameters See Table 4 5...
Page 139: ...User s Manual 125 Figure 4 33 Step 3 Set record type See Figure 4 34...
Page 295: ...User s Manual 281 Figure 4 182 Figure 4 183...
Page 416: ...User s Manual...
