Hypertherm HTA Rev 6.00 Install Guide - Manual (Page 235)

Appendix I: Command ® THC 223
Appendix I: Command
®
THC
Machine Interface
Warning! Configure the port for RS-422 operation before connecting to the Command ® THC. The
Command THC Link must first be enabled in Machine Setups for Type “P” controls and at the Station
configuration for type “V” controls. Refer to the Serial Port section of this guide for additional
information on configuring the serial port for RS-422 communication.
Port Designation
Serial communications for the Command
® THC would automatically be set to the serial port which is
not selected for serial communications. Example: If Serial Port 1 is designated for use as the link to
the Host PC for Downloading of part programs, the HD4070
® communications would be established
on Serial Port 2.
Type “V” control may select the serial port designation at the Ports configuration screen.
RS-422 Connections to Command
® THC with 25-pin D-type connector
Command ® THC Control
Signal Name DB-9 Pin Signal Name DB-9 Pin
RxD - 1 TxD - 2
TxD - 2 RxD - 3
RxD + 20 TxD + 4
TxD + 21 RxD + 7
For improved noise immunity, it is recommended that the cable shields for communication be tied to
ground. Ferrite bead with several wraps on the cable may also be used.