Install a Digital Matter Device Using a Relay

If you source ignition power from an alternator relay terminal, a Digital Matter device may not reliably detect the voltage. Using a relay resolves this issue.

The relay is triggered by the alternator output and routes a separate voltage to the Digital Matter device. When the relay closes, the device detects the voltage and correctly identifies ignition state.

The circuit diagram referenced below demonstrates how to install a Digital Matter device using a relay when sourcing alternator power.

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