Wire two ADC-VDB770s to a mechanical chime

Matthew True

Apr 29, 2021

Two ADC-VDB770s can be wired to a single mechanical chime.

Note: For more information about enrolling the ADC-VDB770s, see Alarm.com Video Doorbell (ADC-VDB770) - Installation Guide.

Important: Digital chimes do not support this wiring configuration.

Wiring	Diagram
Doorbell camera 1 On the power module, attach the white wires interchangeably to the FRONT and TRANS terminals on the chime. Attach the gray wires interchangeably to the transformer and the ADC-VDB770. On the ADC-VDB770, attach the remaining wire to the transformer. Doorbell camera 2 On the power module, attach the white wires interchangeably to the REAR and TRANS terminals on the chime. Attach the gray wires interchangeably to the transformer and the ADC-VDB770. On the ADC-VDB770, attach the remaining wire to the transformer.

Wiring

Diagram

Doorbell camera 1

On the power module, attach the white wires interchangeably to the FRONT and TRANS terminals on the chime.
Attach the gray wires interchangeably to the transformer and the ADC-VDB770.
On the ADC-VDB770, attach the remaining wire to the transformer.

Doorbell camera 2

On the power module, attach the white wires interchangeably to the REAR and TRANS terminals on the chime.
Attach the gray wires interchangeably to the transformer and the ADC-VDB770.
On the ADC-VDB770, attach the remaining wire to the transformer.