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COM Port Connectors
The EITX-3001 board has two D-Sub 9-pin connectors (COM 1
and COM 2) on the front I/O face that support RS-232/422/485
serial communications.
RS-232
Pin
Signal
1
DCD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
The default setting of COM 1 and COM 2 is RS-232. Both COM 1
and COM 2 can be configured in the BIOS Setup Utility to operate
in RS-232, RS-422 or RS-485 mode.
LED Indicators
There are two LEDs on the EITX-3001 front I/O face for indicating
system status:
PWR LED is for power status (green)
HDD LED is for hard disk and compact flash disk status
(red color)
RS-422
RS-485
Signal
Signal
Tx-
DATA-
Tx+
DATA+
Rx+
NC
Rx-
NC
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
13
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