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Serial Port Pinouts –LES1101A-R2
The LES1101A-R2 has one DB9 serial port that can selected to be an RS232, RS485 or RS422 port. By default the
LES1101A-R2 is configured in RS232 mode (with a vertical jumper in place on the left hand SEL pins).
To set the port in RS-422 or RS-485 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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