Advantech UNO-3272G Series User Manual page 23

2.3.1.1 COM connector
UNO-3272G provides four 9-pin D-sub connectors, two of which offer RS-232/422/
485 and the other two offer RS-232 serial communication interface ports. Default set-
ting is RS-232, but this can be modified by BIOS setting. You can find detailed setting
methods in Chapter 3.
Table 2.5: COM Connector Pin Assignments
RS-232
Pin Signal Name
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Note! NC represents "No Connection".
Figure 2.6 COM Connector
RS-422
Signal Name
TX-
TX+
RX+
RX-
GND
-
-
-
-
13
RS-485
Signal Name
DATA-
DATA+
-
-
GND
-
-
-
-
UNO-3272G User Manual