Manual

Embedded Controller AEC-6977
Chapter 2 Hardware Installation 2 - 10
2.19 RS-232/422/485 Pin DEFINE (COM2)
RS-232 Mode
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
RS-422 Mode
Pin Signal Pin Signal
1
TXD-
2
RXD+
3
TXD+
4
RXD-
5
Ground
6
N/C
7
N/C
8
N/C
9 N/C
RS-485 Mode
Pin Signal Pin Signal
1
D-
2
N/C
3
D+
4
N/C
5
Ground
6
N/C
7
N/C
8
N/C
9 N/C
2.20 RS-232 Box Header (COM3)
Pin Signal Pin Signal
1 DCD 2 RXD