Beckhoff CX50x0 Manual de usuario descargar pdf (Pagina 38)

Notes on the documentation

36 CX50x0 - Hardware Documentation

RS422/RS485 connections (CX50x0-N031)

The CX50x0-N030 system interface provides an RS422 or RS 485 interface, COM1 (X300). It is implemented on a 9-

pole Sub-D socket 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/EL6021) 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.

COM interface (socket)

Pin assignment of the COM interface

PIN Signal Typ Beschreibung

2 TxD+ Data-Out + Transmit 422

3 TxD+ Data-In + Receive 422

5 GND Ground Ground

6 VCC VCC +5V

7 TxD- Data-Out - Transmit 422

8 TxD+ Data-In - Receive 422

For RS 485 pins 2 and 3 (data +) must be connected, and pins 7 and 8 (data -).

Setting of interface parameter

RS485, without echo, end-point (termination) default setting

Function Status

Echo on Off

Echo off On

Auto send on On

Always send on Off

Auto receive on On

Alway receive on Off

Term on On

Note Change the parameter

If there is a need for other settings please contact our service department.

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Beckhoff CX50x0 Manual de usuario Pagina 38