RS422/RS485 connections (CX50x0-N031)

RS422/RS485 connections (CX50x0-N031) 1:

The CX50x0-N031 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

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

Parameter setting of the interface

The interface is parameterized as follows:

RS485 without Echo, End-Point (Termination) default setting

Function

State

Echo on

off

Echo off

on

Auto send on

on

Always send on

off

Auto receive on

on

Always receive on

off

Term on

on

Term on

on

NOTICE

Other parameters

If there are other parameters needed, please contact your local service department.