EITX
EITX
EITX
EITX-
--
-3002
3002
3002
3002 User Manual
User Manual
User Manual
User Manual
18
2.1.4.
COM Connector
The EITX-3002 board has two D-sub 9-pin connectors (COM1 and COM2) on
the front I/O coastline that support RS-232/422/485 serial communications.
The pinout of the COM connector is shown below.
Figure
Figure
Figure
Figure 12
12
12
12: COM
: COM
: COM
: COM connector
connector
connector
connector pinout diagram
pinout diagram
pinout diagram
pinout diagram
RS
RS
RS
RS----232
232
232
232
RS
RS
RS
RS----422
422
422
422
RS
RS
RS
RS----485
485
485
485
Pin
Pin
Pin
Pin
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
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
T
T
T
Table
able
able
able 3
3
3
3: COM
: COM
: COM
: COM connector
connector
connector
connector pinout
pinout
pinout
pinout
Note:
Note:
Note:
Note:
The default setting of COM1 and COM2 is RS-232. Both COM1 and COM2 can be configured in the
BIOS Setup Utility to operate in RS-232, RS-422 or RS-485 mode.
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