The torch breakaway signal is used to stop plasma and machine axis movements if the plasma torch is hit during a cut.

For this setup, generally the torch is mounted on magnetic holders and when the torch hits something such as a cut metal piece then the torch comes off the magnetic holders triggering a switch or sensor.

Wiring example

Below is a simple wiring example showing how to wire a torch breakaway switch. A 5 to 24 VDC signal can be used.