Avalue PPC-1727 - Manual (Page 11)

Quick Reference Guide
PPC-1725/1727 Series Quick Reference Guide 11
2.1 PPC-1725/1727 Series connector mapping
2.1.1 Serial Port 1 connector (COM1)
In RS-232 Mode
Signal PIN PIN Signal
DCD1 1 2 RxD1
TxD1 3 4 DTR1
GND 5 6 DSR1
RTS1 7 8 CTS1
RI1 9 NC
In RS-422 Mode
Signal PIN PIN Signal
TxD1- 1 2 RxD1+
TxD1+ 3 4 RxD1-
GND 5 6 NC
NC 7 8 NC
NC 9 NC
In RS-485 Mode
Signal PIN PIN Signal
DATA1- 1 2 NC
DATA1+ 3 4 NC
GND 5 6 NC
NC 7 8 NC
NC 9 NC