Here is a video I put together to show how you could use the alarm input and output on a Dahua NVR 5216-4kS2.
The relays on the NVR are only rated at 1 amp so you have to be carful when supplying input power for what ever you use for the output alarm.
The relays on the NVR are only rated at 1 amp so you have to be carful when supplying input power for what ever you use for the output alarm.
