Dahua NVR2104-I2, User Manual

Page: 85 / 459

Figure 2-99 Alarm input port (2)
●
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.
User's Manual
72