Advantech ARK-2121, User Manual

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ARK-2121 User Manual 10
2.3 Connectors
2.3.1 ARK-2121L External I/O Connectors
ARK-2121L:
Figure 2.2 ARK-2121L IO connectors drawing
2.3.1.1 COM Connector
ARK-2121L 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-2121L.
The RS-422/485 mode of ARK-2121L COM3~COM4 can be supported via BIOS set-
ting. The setting is under Advanced BIOS Features Setup -> Super IO Configuration.
Figure 2.3 COM connector
Setting Function
1* NC (Default)
2 RTC_TEST#
3 GND (Clear CMOS)
USB3
USB1
USB4
USB2 HDMI VGA
HDD LED
PWR LED
LAN2
LAN1
LINE-OUT MIC
LINE-IN
ON/OFF
DC INPUT COM3
COM1
COM4
COM2
1 2 3 4 5
6 7 8 9