10 rs232 connections (cx9020-n030) – BECKHOFF CX9020 User Manual
Page 28
Mounting and wiring
3.10
RS232 connections (CX9020N030)
The CX9020N030 system interface provides an RS232 interface, COM1 (X300). It is implemented on a 9
pole SubD pin strip. If more than one interface is required the system can be extended via the Terminal Bus
(K or Ebus) 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)
Table 4: Pin assignment of the COM interface
PIN
Signal
Type
Description
2
RxD
Signal in
Receive Data
3
TxD
Signal out
Transmit Data
5
GND
Ground
Ground
7
RTS
Signal out
Ready to Send
8
CTS
Signal in
Clear to Send
CX9020
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Version 1.1