Alarm Output Port - Dahua NVR52-4KS2 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 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.
●
Figure 2-129 Alarm input port (2)
85
User's Manual