How To Wire two ADC-VDB750s to a mechanical chime

Wire two ADC-VDB750s to one mechanical chime

Important: Digital chimes do not support this wiring configuration.

  1. Wire one terminal from each ADC-VDB750 to the transformer.
  2. Wire the other terminal from the first ADC-VDB750 to the FRONT terminal on the chime.
  3. Wire the other terminal from the second ADC-VDB750 to the REAR terminal on the chime.
  4. Wire one terminal of the transformer to the TRANS terminal on the chime.

More information on the VDB750 can be found here: