C9900-E203 with 1 serial interface RS232

The serial interface RS232 is led out via a standard 9-pin D-sub connector in a slot bracket. The port address and the used interrupt are configured automatically, but can also be set manually with the help of the BIOS setup if required.

C9900-E203 with 1 serial interface RS232 1:Fig.14: RS232 interface pin numbering
RS232 interface pin numbering

Pin

Name

Description

1

DCD

Data Carrier Detect

2

RXD

Receive Data

3

TXD

Transmit Data

4

DTR

Data Terminal Ready

5

GND

Ground

6

DSR

Data Set Ready

7

RTS

Request to Send

8

CTS

Clear to Send

9

RI

Ring Indicator