Power Connections; Figure 2.4:Power Pin Assignments - Advantech UNO-1019 User Manual

Refer to the figure and table below for COM3 & COM4 descriptions.
COM3 & COM4 Pin Assignments
Pin RS-232
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI

2.5 Power Connections

UNO-1019 supports +10 ~ 30 V
image is shown below
RS-422
TxD-
TxD+
RxD+
RxD-
GND
-
-
-
-
Figure 2.4: Power Pin Assignments
RS-485
Data-
Data+
-
-
GND
-
-
-
-
power inputs. A detailed power pin
DC
13 Chapter 2