Advantech ARK-2230, User Manual, Page: 22 / 60

ARK-2230 User Manual 10
2.3 Connectors
2.3.1 ARK-2230L External I/O Connectors
2.3.1.1 COM Connector
ARK-2230 provides four D-sub 9-pin connectors, which offers RS-232 or 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-2230L.
The RS-422/485 mode of ARK-2230 COM3~COM4 can be supported via BIOS set-
ting. The setting is under Advanced BIOS Features Setup -> Super IO Configuration.
Figure 2.2 COM connector
Setting Function
1* NC (Default)
2 RTC_TEST#
3 GND (Clear CMOS)
Table 2.2: COM Connector Pin Assignments
RS-232 RS-422 RS-485
Pin Signal Name Signal Name Signal Name
1 DCD Tx- DATA-
2 RxD Tx+ DATA+
3 TxD Rx+ NC
4 DTR Rx- NC
5 GND GND GND
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC
Note! NC represents “No Connection”.
1 2 3 4 5
6 7 8 9