Advantech ARK-3202V -S6A1E User Manual page 19

COM Port / COM3~COM5
The ARK-3202V comes with a D-Sub 26-pin connector that carries COM Port signal,
and can support RS-232, RS-422 and RS485 via internal DIP switch.
Pin RS-232
1 DCD3
2 RxD3
3 TxD3
4 DTR3
5 DCD5
6 RxD5
7 GND
8 CTS5
9 RI5
10 DSR4
11 RTS4
12 CTS4
13 RI4
14 DSR3
15 RTS3
16 CTS3
17 RI3
18 DSR5
19 RTS5
20 TxD5
21 DTR5
22 DCD4
23 RxD4
24 TxD4
25 DTR4
26 GND
RS-422
Tx3-
Tx3+
Rx3+
Rx3-
Tx4-
Tx4+
Rx4+
Rx4-
11 ARK-3202V User Manual
RS-485
D3-
D3+
D4-
D4+