Requirements for discrete

This information prepares you to connect the plasma power supply to the Computer Numerical Control (CNC) with discrete cables.

  • You must use serial RS-422 or the XPR® web interface through Wi-Fi® with discrete to operate the cutting system. If you use EtherCAT®, remote on-off must be wired discretely by the cutting system manufacturer.
  • You can use serial RS-422 or the XPR web interface through Wi-Fi with discrete to operate the cutting system.
  • To use Arc Voltage Control (AVC) with a serial RS-422 cutting system, connect pin 5 and pin 6 to J4 on the expansion Printed Circuit Board (PCB) to get access to the estimated arc voltage. For information about how to configure the arc voltage output scale through serial or EtherCAT, refer the CNC Communication Protocol for the XPR Cutting System (809810).
  • For an example of a system diagram, refer to Discrete multi-drop (multi-system) interface (Sheet 21 of 25).
  • For information about signals and protocols, refer to XPR discrete communication in the CNC Communication Protocol for the XPR Cutting System (809810).
  • For cable lengths, refer to Discrete CNC interface cables.
  • Hypertherm® recommends a minimum distance of 1 meter (3.3 feet) between the plasma power supply and other system components, or between the plasma power supply and an obstacle.
Figure 1. Discrete cable
Example discrete cable
1 End A to the plasma power supply
2 End B to the CNC
Figure 2. Discrete cable for the expansion PCB
Image of an example discrete cable for the expansion Printed Circuit Board.
1 End A to the plasma power supply
2 End B to the CNC