2.2 System Front IO
IO Port
Description
Power Button with dual LED
ATX Power-on button with LEDs: Standby
mode in Red; Power-on mode in Green
USB 2.0 Ports
Double-stacked USB 2.0 type A connectors
COM 1~ COM 4
The serial port consists of a 9-pin, RS232 configured with
automatic hardware flow control D-SUB connector that
allows the connection of a serial peripheral.
COM 1 supports RS232/422/485, To switch among
RS232/422/485, use the BIOS menu.
NOTE:
This system supports RS232/422/485 on COM1 port. Please refer to below table for the pin
definition. In addition, COM1 port (RS232/422/485) can be adjusted in BIOS setup utility > Advanced
Screen > Super IO Configuration.
COM1 Port Pin Definition
Pin
RS232
RS422
RS485
1
DCD
TX-
RTX-
2
RXD
RX+
N/A
3
TXD
TX+
RTX+
4
DTR
RX-
N/A
5
GND
GND
GND
6
DSR
N/A
N/A
7
RTS
N/A
N/A
8
CTS
N/A
N/A
9
NA/+5V/+12V
N/A
N/A
