Wiring a Keyswitch with Relay Module

This guide will show you how to remotely arm and disarm a traditional wired alarm system using Konnected and a relay module to trigger a keyswitch zone.

To remotely arm/disarm using this method, you must have an unused zone on the traditional alarm panel that can be assigned as a keyswitch. This means you'll need the panel's installer code and a keypad capable of programming it.

A keyswitch zone type is supported by most traditional systems to arm/disarm the device with a momentary contact closure or opening. Think of a physical "key switch" that arms the alarm when you insert and turn a key. In this setup, we use a relay module, controlled by commands from your smart home platform to Konnected, to make that momentary connection.

Wiring Illustration

In this illustration, Zone 6 on the traditional panel is programmed as a keyswitch. The circuit across Z6 and COM is closed with the appropriate resistor for the panel via the NC/COM contacts on the relay. When signaled by Konnected, the relay momentarily opens this connection, triggering the traditional panel to arm or disarm.

  1. Identify an unused zone on the traditional alarm panel. Follow the alarm panel's programming guide to program this zone as a keyswitch zone.
  2. Connect the NC or NO terminal of the relay module to the keyswitch zone. Whether you use Normally Open or Normally Closed depends on the programming and capabilities of your traditional panel.
  3. Connect the COM terminal on the relay module to a COM terminal on the traditional panel.
  4. If the traditional panel requires a specific resistance value, wire the appropriate resistor inline with either the keyswitch zone or COM. Not all panels require a resistor, and some can be programmed either way.
  5. Connect the opposite side of the relay module to the pins on the Konnected Alarm Panel Add-on or Pro using jumper wires as follows:

    Konnected Panel
    Relay module
    +5VDC+
    GNDDC-
    OUTIN
  6. Configure the OUT zone as a Momentary Switch in your smart home platform. The momentary switch may need to be set to open for at least 1000ms to work with most systems.

Did you find it helpful? Yes No

Send feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.