Security+ 2.0 Dry Contact Adapter


Dry contact adapter for LiftMaster and Chamberlain Security+ 2.0 garage door openers.

SKU: 883LM-DCA Category:


Connect the aftermarket smart garage door controller to Security+ 2.0 LiftMaster or Chamberlain opener with yellow “learn” button.

Most of the garage door openers work with a wired doorbell-type buttons that momentarily connect the two wires. This makes it easy to interface them with the smart garage door controllers such as Garadget (see how it works). A small number of LiftMaster and Chamberlain openers use a proprietary communication protocol and do not support a simple button control. It is however still possible to control them externally by using a native remote as an adapter. This adapter utilizes a native LiftMaster 883LM wired wall controller.


  • Connect red and white wires to the corresponding terminals in the garage door opener alongside the existing wires from the wall console.
  • Test the button on the adapter and ensure that it operates the door. The existing wall button should also continue to work.
  • Connect two remaining wires to Garadget’s blue terminal; the polarity of Garadget connection is not important.
  • Use Garadget app to test the remote commands.
Security+ 2.0 Dry Contact Adapter

Additional information

Weight 0.1 lbs
Dimensions 3 × 2 × 2 in


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