ADC-VDB750 wiring guide

Wire one VDB750 to one mechanical chime and an AC transformer

Transformer: 16-24VAC 10-40VA | Power Module: Not Required | Resistor: Might Be Needed | Chime Type: Mechanical

1. Verify that the TRANS terminal on the chime is connected to one of the terminals on the transformer.
2. On the ADC-VDB750, attach either one of the wires to the FRONT or REAR terminal of the chime.
3. Attach the other wire from the ADC-VDB750 to the remaining open terminal on the transformer.

Wire one VDB750 to one mechanical chime and a DC adapter

Transformer: Not Required | Power Module: Not Required | Resistor: Not Required | Chime Type: Mechanical

1. Attach one wire from the DC adapter to the ADC-VDB750.
2. Attach the other wire from the DC adapter to the TRANS terminal of the chime.
3. Attach the remaining wire from the ADC-VDB750 to the FRONT or REAR terminal on the chime.

Wire one VDB750 to one digital chime and an AC Transformer

Transformer: 16-24VAC 10-40VA | Power Module: Required | Resistor: Not Required | Chime Type: Digital

1. Verify that the TRANS terminal on the chime is connected to one of the terminals on the transformer.
2. Attach one of the wires from the ADC-VDB750 to the remaining open terminal on the transformer.
3. Attach the remaining wire from the doorbell to the REAR  or FRONT  terminal on the digital chime.
4. Attach the white wires of the power module interchangeably to the same terminals on the chime as the transformer and doorbell.

Wire one VDB750 to two mechanical chimes with an AC Transformer

Transformer: 16-24VAC, 20-40VA | Power Module: Not Required | Resistor: Might Be Needed | Chime Type: Mechanical

1. Wire one terminal of the transformer to the TRANS  terminal of each chime. A wire connector may be used to simplify the wiring at the transformer terminal.
2. Wire the ADC-VDB750 to the FRONT or REAR terminal of each chime. A wire connector may be used to simplify the wiring at the doorbell backplate.
3. Wire the remaining terminal of the transformer to the ADC-VDB750 backplate.

Wire one VDB750 to two digital chimes with an AC Transformer

Transformer: 16-24VAC 20-40VA | Power Module: Required | Resistor: Not Required | Chime Type: Digital

1. On the first power module, attach the white wires interchangeably to the FRONT  and TRANS terminals on the first chime.
2. On the second power module, attach the white wires interchangeably to the FRONT  and TRANS terminals on the second chime.
3. Wire one terminal of the transformer to the TRANS terminal of each chime. A wire connector may be used to simplify the wiring at the transformer terminal.
4. Wire the ADC-VDB750 to the FRONT terminal of each chime. A wire connector may be used to simplify the wiring at the doorbell backplate.
5. Wire the remaining terminal of the transformer to the ADC-VDB750 backplate.

Wire one VDB750 with no chime and an AC Transformer

Transformer: 16-24VAC 10-40VA | Power Module: Not Required | Resistor: Not Required | Chime Type: None

Connect both wires from the AC transformer to the terminals on the back of the ADC-VDB750.

Wire one VDB750 with no chime and a DC adapter

Transformer: Not Required | Power Module: Not Required | Resistor: Not Required | Chime Type: None

Connect both wires from the DC adapter to the terminals on the back of the ADC-VDB750.

Wire one VDB750 with no chime and an AC Transformer

Transformer: 16-24VAC 10-40VA | Power Module: Not Required | Resistor: Not Required | Chime Type: None

Connect both wires from the AC transformer to the terminals on the back of the ADC-VDB750.

Wire one VDB750 with no chime and a DC adapter

Transformer: Not Required | Power Module: Not Required | Resistor: Not Required | Chime Type: None

Connect both wires from the DC adapter to the terminals on the back of the ADC-VDB750.

Wire two VDB750s to one mechanical chime and an AC Transformer

Transformer: 16-24VAC 20-40VA | Power Module: Not Required | Resistor: Not Required | Chime Type: Mechanical

Wiring	Diagram
Wire one terminal from each ADC-VDB750 to the transformer. Wire the other terminal from the first ADC-VDB750 to the FRONT terminal on the chime.  Wire the other terminal from the second ADC-VDB750 to the REAR terminal on the chime.  Wire one terminal of the transformer to the TRANS terminal on the chime.