Com Port Rs232/422/485 Settings - Advantech UNO-2271G V2 User Manual

Table A.7: mPCIe Connector Pin Assignments
43 MPCIE_PWRSEL
45 NC
47 NC
49 NC
51 MSATA#_z_PCIE_SEL
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.
Table A.8: COM Connector Pin Assignments
Pin COM1 Mode
RS232
1 RS422
RS485
RS232
3 RS422
RS485
RS232
5 RS422
RS485
RS232
7 RS422
RS485
RS232
9 RS422
RS485
UNO-2271G_V2 User Manual
44
46
48
50
52
Signal Name Pin
CTS
T- 2
D-
RXD
T+ 4
D+
TXD
R+ 6
RTS
R- 8
GND
GND 10
GND
40
NC
NC
+V1.5
GND
+V3.3_MINI
COM2 Mode Signal Name
RS232 CTS
RS422 T-
RS485 D-
RS232 RXD
RS422 T+
RS485 D+
RS232 TXD
RS422 R+
RS485
RS232 RTS
RS422 R-
RS485
RS232 GND
RS422 GND
RS485 GND