BECKHOFF CX50x0 User Manual
Page 37
Notes on the documentation
CX50x0 - Hardware Documentation
35
RS232 connections (CX50x0-N030)
The CX50x0-N030 system interface provides an RS232 interface, COM1 (X300). It is implemented on a 9-pole Sub-
D pin strip. If more than one interface is required the system can be extended via the Terminal Bus (K- or E-bus) or
Bus Terminals (KL/EL6001) which provide serial interfaces. The pin assignment is shown at the bottom of the page.
The maximum baud rate on both channels is 115 kbit. The interface parameters are set via the operating system or
from the PLC program.
RS232 COM interface (connector)
Pin assignment of the COM interface
PIN
Signal
Type
Description
1
DCD
Signal in
Data Carrier Detected
2
RxD
Signal in
Receive Data
3
TxD
Signal out
Transmit Data
4
DTR
Signal out
Data Terminal Ready
5 GND
Ground
Ground
6
DSR
Signal in
Dataset Ready
7
RTS
Signal out
Request to Send
8
CTS
Signal in
Clear to Send
9
RI
Signal in
Ring Indicator