Console Server & Router User Manual 321
Serial Port Pinouts –SD4001
The SD4001 has one DB9 serial port that can selected to be an RS232, RS485 or RS422 port. By default the
SD4001 is configured in RS232 mode (with a vertical jumper in place on the left hand SEL pins).
To set the port in RS422 or RS485 mode you must remove the SEL jumper and then configure the Signaling
Protocol using the Management Console.
The DB9 pin-out is:
Pin: RS232 RS422 RS485
1 DCD DCD+ -
2 RXD RX - -
3 TXD TX + D+
4 DTR DTR+ -
5 GND GND GND
6 DSR RX + -
7 RTS TX - D-
8 CTS DCD- -
9 - DTR- -
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