Hypertherm Phoenix 8.0 - Manual (Page 523)

Serial Ports
516
RS-232C Connections to Host PC with 9-pin D-type connector
Host PC Control
Signal Name DB-9 Pin Signal Name DB-9 Pin
Shield 1 Shield 1
RxD 2 TxD 2
TxD 3 RxD 3
Common 5 Common 5
RS-232C Connections to Host PC with 25-pin D-type connector
Host PC Control
Signal Name DB-25 Pin Signal Name DB-9 Pin
Shield 1 Shield N/C
RxD 3 TxD 2
TxD 2 RxD 3
Common 7 Common 5