CX1020-N031/41 connections

CX1020-N031/41 connections 1:

The CX1020-N031 system interface features two RS422 / RS 485 interfaces, COM1 (X310) and COM2 (X311) (9 pin Sub-D plug connector). If there is need for more than two serial interfaces two further RS422 / RS485 interfaces, COM3 (X410) and COM4 (X411) (9 pin Sub-D plug connector) can be added to the system via the system interface CX1020-N41. 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.

COM interface (connector):

CX1020-N031/41 connections 2:
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 CX1020-N031/N041 resides at  the end of the CX1020-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:

 

CX1020-N031/41 connections 3:

 

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.

Settings DIP switches RS485:

RS485 without Echo, End-Point ( Terminated) DEFAULT setting

DIP

Status

Function

1

off

Echo on

2

on

Echo off

3

on

Auto send on

4

off

Always send on

5

on

Auto receive on

6

off

Always receive on

7

on

Term on

8

on

Term on

 

RS485 with Echo, End-Point ( Terminated)

DIP

Status

Function

1

on

Echo on

2

off

Echo off

3

on

Auto send on

4

off

Always send on

5

off

Auto receive on

6

on

Always receive on

7

on

Term on

8

on

Term on

RS485 without Echo, Drop-Point ( without Termination)

DIP

Status

Function

1

off

Echo on

2

on

Echo off

3

on

Auto send on

4

off

Always send on

5

off

Auto receive on

6

on

Always receive on

7

off

Term on

8

off

Term on

RS485 with Echo, Drop-Point ( without Termination)

DIP

Status

Function

1

on

Echo on

2

off

Echo off

3

on

Auto send on

4

off

Always send on

5

off

Auto receive on

6

on

Always receive on

7

off

Term on

8

off

Term on

Setting DIP-Switches RS422:

RS422 full duplex end point

DIP

Status

Function

1

on

Echo on

2

off

Echo off

3

off

Auto send on

4

on

Always send on

5

off

Auto receive on

6

on

Always receive on

7

on

Term on

8

on

Term on

 

The system interface CX1020-N31 can only be used instead and not at the same time with system interface CX1020-N030. The system interface CX1020-N41 can only be used instead and not at the same time with system interface CX1020-N040.

See also