13 <serial port – COMMELL AS-C74 User Manual
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AS-C74 User’s Manual
29
2.13 <Serial Port>
The board supports Three RS232 serial port and one jumper selectable RS232/422/485
serial ports. The jumper JCSEL1 & JCSEL2 can let you configure the communicating
modes for COM2.
Connector: COM2
Type: 9-pin header connector for COM2
Pin
Description
Pin
Description
1 DCD/422TX-/485- 2 RXD/422TX+/485+
3 TXD/422RX+
4 DTR/422RX-
5 GND
6 DSR
7 RTS
8 CTS
9 RI
10
N/C
COM1
COM3
COM2
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