Requirements for serial RS-422

This information prepares you to connect the plasma power supply to the Computer Numerical Control (CNC) with serial RS-422 cables.

  • For an example of a system diagram, refer to Serial RS-422 and discrete multi-drop (multi-system) interface (Sheet 20 of 25).
  • For serial RS-422 multi-drop (multi-system) addressing, refer to XPR serial RS-422 multi-drop (multi-system) addressing in the CNC Communication Protocol for the XPR Cutting System (809810).
  • For information about signals and protocols, refer to XPR serial RS-422 communications and Serial RS-422 and EtherCAT commands in the CNC Communication Protocol for the XPR Cutting System (809810).
  • 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 access the estimated arc voltage. For information about how to configure the arc voltage output scale through serial or EtherCAT®, refer to the CNC Communication Protocol for the XPR Cutting System (809810).
  • For cable pinout details, refer to Pinouts for serial RS-422 interface cables.
  • For cable lengths, refer to Serial 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. Serial RS-422 cable
Example of a serial RS-422 cable
1 End A (male) to the plasma power supply (top serial connector, J12)
2 End B (male) to the CNC