Use ohmic contact sense

You can use internal or external ohmic contact sense. No action is necessary for internal ohmic contact sense. To use external ohmic contact sense, make the following modification to the ohmic wiring inside of the TorchConnect™ console.

When you work with ohmic contact sense, it helps to know the following conditions related to ohmic relays:
  • The ohmic relay is usually open when not powered.
  • The ohmic relay is closed and ohmic contact is enabled, except during ignition or when:
    • Cutting with a water process, or
    • The remote on-off switch is in the OFF position.
  • With external ohmic contact sense, the relay is still used to help isolate the ohmic circuit from high voltage.
  1. Remove the power from the cutting system:
    1. Set the line-disconnect switch to the OFF position.
    2. Make sure that the power-indicator Light Emitting Diode (LED) on the TorchConnect console is not illuminated.
  2. Disconnect the ohmic wire from J3 on the ohmic Printed Circuit Board (PCB) in the TorchConnect console.
  3. Connect the ohmic wire that you removed from J3 to J4 pin 1.
  4. Do you have a third-party ohmic circuit? OptionDescription
    If yes... Remove the plug from the sheet metal on the TorchConnect console to get access to the ohmic wire inside. The plug is below the torch lead connection, as shown.
    If no... Go to the next step.
    Torch connect console image that shows the plug that you must remove to get to the ohmic wire inside.
  5. Connect the ohmic wire from the ohmic relay to J4 pin 2 on the ohmic PCB in the TorchConnect console.
  6. Connect the ohmic wire to the PCB connection for ohmic inside the torch lifter.

    Refer to Example of external ohmic contact sense.