The Alarm.com PoE Video Doorbell (ADC-VDB755P) is wired in the same configuration for both mechanical and digital chimes for ease of installation.
Important: The transformer must be rated for the chime in use.
Working doorbell check
First, verify that the existing wired doorbell is working and that it is wired properly. If the existing doorbell does not ring the indoor chime when the button is pressed, there is a power issue. This must be addressed before beginning the Alarm.com Video Doorbell installation process.
Wired doorbell check
Verify the existing doorbell is wired by visually inspecting the doorbell button for wires. If necessary, the doorbell can be removed from the wall to check for wiring. You can also inspect the chime inside the home; a chime plugged into a power outlet might indicate an incompatible wireless doorbell system is in place.
Wire the VDB755P to a mechanical or digital chime
After wiring the doorbell to the transformer, wire the doorbell using the screw terminals located on the wall mount assembly to the front or rear terminal of the chime.
