Hypertherm XPR300 User Manual

Connect for Communication
4
194 809480 Instruction Manual XPR300
External ohmic contact sense
If you plan to use external ohmic contact sense, make the following modification to the ohmic wiring
inside of the torch connect console.

The relay is still used to help isolate the ohmic circuit from high voltage.
1. Remove the power from the cutting system:
a. Set the line-disconnect switch to the OFF position.
b. Make sure that the power-indicator LED is not illuminated on the torch connect console.
2. Disconnect the ohmic wire from J3 on the ohmic PCB in the torch connect console.
3. Connect the ohmic wire that you removed from J3 to J4 pin1.
4. If you have a third-party ohmic circuit, remove the plug from the sheet metal on the torch
connect console to access the ohmic wire inside. Otherwise, skip to step 5.

The plug is located below the torch lead connection (Figure 54).
Figure 54 – Remove plug to access the ohmic wire if you use a third-party ohmic circuit

Hypertherm XPR300 Specifications

General

Brand	Hypertherm
Model	XPR300
Category	Welding System
Language	English