Advantech ARK-2121F User Manual page 21

2.3.1.1 COM Connector
ARK-2121F provides four D-sub 9-pin connectors, which offers RS232/422/485
serial communication interface ports. Default setting is RS-232, if you want to use
RS-422/485, you can find the BIOS setting in Chapter 3.4.2 for ARK-2121F.
The RS-422/485 mode of ARK-2121F COM1~COM6 can be supported via BIOS set-
ting. The setting is under Advanced BIOS Features Setup -> Super IO Configuration.
Table 2.2: 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".
1 2 3 4 5
6 7 8 9
Figure 2.3 COM connector
RS-422
Signal Name
Tx-
Tx+
Rx+
Rx-
GND
NC
NC
NC
NC
11
RS-485
Signal Name
DATA-
DATA+
NC
NC
GND
NC
NC
NC
NC
ARK-2121F User Manual