I was having issues getting the PIR sensor of my DS-2CD2432F-IW to trigger recording on my DS-7608NI-I2/8P NVR.
Enabling the PIR alarm on the camera and listening for the alarm on the NVR wasn’t working correctly. I could see the PIR alarm being captured in the log of the NVR, but it wasn’t recording video when the alarm was triggered. After a few hours of troubleshooting I found the following solution.
On the NVR, navigate to the Alarm Input tab, and select the appropriate Alarm Input choice. If your camera is set as “Camera 5”, the IP will be 192.168.254.6, “Camera 6” would be 192.168.254.7, etc. The Alarm Type is set to “NO” (Normally Open). Select Enable Alarm Input Handling.
On the NVR, navigate to the Schedule Settings and select the camera we are enabling the PIR alarm for. Here’s the tricky part. Don’t select “Alarm | Motion” or “Alarm”. For whatever reason these do not get triggered for an alarm output. I selected “Event” and set the appropriate times I wanted it for fire.
The PIR sensor on the camera doesn’t trigger “Alarm” or “Motion” on the NVR. It does seem to trigger “Event”. My hypothesis is the “Alarm” choices only fire when the direct alarm connections on the back of the NVR are triggered. If the trigger is coming over the ethernet line from the camera it works differently. I have not tested this hypothesis yet, however. If you are not sure the PIR is working on the camera, enable Audible Warning on the linkage method on the camera.