Mechanical vs Digital Door Chimes

You can tell if you have a mechanical chime by removing the cover and checking to see if there is a metal chime that is physically hit by a strike.

You can tell if you have a digital door chime by removing the cover and checking to see if there is a speaker that plays the doorbell sound.


If you are having trouble with setting up your existing mechanical or digital chime, double check that the chime meets the requirements: mechanical or digital chime (8-12 VAC input). If the chime requires more than 12 VAC input or less than 8 VAC input, it is not compatible with the international power module.

If you continue to have trouble, please refer to this list of compatible chimes that have been tested and certified by Alarm.com:

  • Byron 1210, 771, 776, 761
  • Honeywell Friedland E2500, DW315s, DC917s, D792, D107 Facet, D117 Ding Dong, D103 GALA, D230 Big Ben
  • Panasonic EC5117WKP, EC5227W, EC5347
  • Arlec DCS13
  • Axiom DBYRK1
  • Chacon 84199
  • Grothe CROMA 230
  • REV Westminster Gong
  • ASC 102B Campanilla
  • MJK Modelo 494, 212
This chime list is not exhaustive and there are other chimes that are supported.

Wire the ADC-VDB770 without a chime

The ADC-VDB770 can be powered without a chime, but it requires a resistor rated at 10 Watts 10 Ohms with 5% tolerance. If you are using a plug-in DC power supply, you cannot use a chime. Therefore, you must use the following wiring configuration below.
For more information about enrolling the ADC-VDB770, see Alarm.com/doorbell/install.

To wire the ADC-VDB770 without a chime:

    1. On the power module, attach the white wires interchangeably to a resistor (10 Watts 10 Ohms with 5% tolerance).
    2. Attach the gray wires interchangeably to the DC Power Supply and the ADC-VDB770.

    1. Do not connect the black wires (these should remain insulated and not in contact with any components) – this can result in damage to hardware.

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