Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 101)

CĆ1
Appendix C
RSĆ232 Port Pinout
PIN 13 PIN 1
PIN 14 PIN 25
PIN # SIGNAL
2 XMIT
3 RECV
7 COM
The RSĆ232 port is used for programming terminal communications with the
Remote I/O module, Remote I/O Head, or Remote Drive Interface Head. The
programming terminal is connected to this port using an Interface cable
(M/N 61C127).