Rs-232/422/485 9Pin Serial Port (Com1~Com2); Table A.5:Rs-232/422/485 Pin Assignments - Advantech UNO-4678 User Manual

A.3 RS-232/422/485 9pin Serial Port (COM1~COM2)
Table A.5: RS-232/422/485 pin assignments
Pin
1
2
3
4
5
6
7
8
9
UNO-4678 User Manual
1 2
6
RS-232
DCD
Rx
Tx
DTR
GND
DSR
RTS
CTS
RI
3 4 5
7 8 9
RS-422
Tx-
Tx+
Rx+
Rx-
GND
-
-
-
-
24
RS-485
Data-
Data+
-
-
GND
-
-
-
-