Advantech UNO-2271G V2 - A.8 COM Port RS232;422;485 Settings

UNO-2271G_V2 User Manual 40
A.8 COM Port RS232/422/485 Settings
The default setting for the COM port is RS-232. This can be changed to RS-422 or
RS-485 modes can be configured by adjusting switch on the motherboard.
43 MPCIE_PWRSEL 44 NC
45 NC 46 NC
47 NC 48 +V1.5
49 NC 50 GND
51 MSATA#_z_PCIE_SEL 52 +V3.3_MINI
Table A.7: mPCIe Connector Pin Assignments
Table A.8: COM Connector Pin Assignments
Pin COM1 Mode Signal Name Pin COM2 Mode Signal Name
1
RS232 CTS
2
RS232 CTS
RS422 T- RS422 T-
RS485 D- RS485 D-
3
RS232 RXD
4
RS232 RXD
RS422 T+ RS422 T+
RS485 D+ RS485 D+
5
RS232 TXD
6
RS232 TXD
RS422 R+ RS422 R+
RS485 RS485
7
RS232 RTS
8
RS232 RTS
RS422 R- RS422 R-
RS485 RS485
9
RS232 GND
10
RS232 GND
RS422 GND RS422 GND
RS485 GND RS485 GND