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Product overview

CX9000 / CX9010 27Version: 2.6

2.4.4 CX90x0-N031 connections

The CX90x0-N031 system interface features two RS422 / RS 485 interfaces, COM1 and COM2 (9 pin Sub-D

plug connector).

The maximum baud rate on all channels is 115 kBit. The pin assignment for all interfaces is equal and

described below. The interface parameter can be set in the operating system or in the PLC program.

RS232 COM interface (connector):

Table4: Pin assignment COM interface:

PIN Signal Type Description

2 TxD+ Data-Out + Transmit 422

3 RxD+ Data-In + Receive 422

5 GND Ground Ground

6 VCC VCC +5V

7 TxD- Data-Out - Transmit 422

8 RxD- Data-In - Receive 422

For RS 485 Pin 2 and 3 ( Data +) as well as Pin7 and 8 (Data -) have to be connected..

Setting the interface parameter

If the system interface CX90x0-N031 resides at the end of the CX90x0-system block, it is easy to access the

dip switches. The dip switches for the configuration of the RS485/422 interfaces can be found at the left side

of the module. If you remove the grey cover you can see the switch:

The upper switch sets the parameters for the upper interface, the lower switch sets the parameter for the

lower interface. The system must be powered down, if the settings of the switches are changed! The settings

for default use should be mentioned by ordering the interface module.

Beckhoff CX90x0 Series User Manual

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