Avalue APC-18W9 - Manual (Page 11)

Quick Reference Guide
APC-18W9 Quick Reference Guide 11
2.1 APC-18W9 connector mapping
2.1.1 Serial port connector (COM)
RS-232
Signal PIN PIN Signal
DCD 1 6 DSR
RXD 2 7 RTS
TXD 3 8 CTS
DTR 4 9 RI
GND 5
RS-422
Signal PIN PIN Signal
TxD- 1 6 NC
TxD+ 2 7 NC
RxD+ 3 8 NC
RxD- 4 9 NC
GND 5
RS-485
Signal PIN PIN Signal
DATA- 1 6 NC
DATA+ 2 7 NC
NC 3 8 NC
NC 4 9 NC
GND 5