Isolated 5-Wire Rs-232/422/485 Serial Port; Com3 Com4; Table A-3 Isolated 5-Wire Rs-232/422/485 Serial Port Pin Assignments; Table A-4: Jumpers To Select 5-Wire Rs-232/422/485 - Advantech UNO-2050 User Manual

A.3 Isolated 5-wire RS-232/422/485 Serial
Port (COM3 ~ COM4)
Pin Assignments

Table A-3 Isolated 5-wire RS-232/422/485 serial port pin assignments

Pin 5-wire RS-232 Signal Name RS-422 Signal Name RS-485 Signal Name
1
2
3
4
5
Note: NC represents "No Connection."
RS-232/422/485 Selection
COM3 and COM4 support 5-wire RS-232, RS-422 or RS-485 interfaces,
and you can set corresponding jumpers to select serial ports as RS-232
or RS-422/485 interfaces shown in Table A-4.
The system detects RS-422 or RS-485 signals automatically in RS-422/
485 mode.

Table A-4: Jumpers to select 5-wire RS-232/422/485

Serial Port
COM3
COM4
1 2 3 4 5
COM3
RxD
TxD
RTS
CTS
GND
Corresponding jumper to select RS-232/422/485
1 2 3 4 5
COM4
TxD+
TxD-
RxD+
RxD-
GND
JP4
JP5
Appendix A Pin Assignments
DATA+
DATA-
NC
NC
GND
3 5