PPC-2127
10 PPC-2127 Quick Reference Guide
2.1 PPC-2127 connector mapping
2.1.1
External Serial port 1 connector (COM1)
Note:
COM1 RS-232/422/485 mode select by SW1 (RS-232 is
default).
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
TX1-
1
6
NC
RX1+
2
7
NC
TX1+
3
8
NC
RX1-
4
9
NC
GND
5
RS-485
Signal
PIN PIN
Signal
TX1-
1
6
NC
NC
2
7
NC
TX1+
3
8
NC
NC
4
9
NC
GND
5
