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Serial Interface (CM-eXT04-D)

Serial Interface (CM-eXT04-D)

Owned by 주익균(Ik Kyun Joo)
Last updated: Oct 25, 2024
1 min read

● COM1: RS-422/485 / COM2: RS-232C

This interface is used to connect the Xpanel to the host (PLC), via n RS-232C or RS-422/485 cable.

COM1 and COM2 share pins of 9-Pin DSUB connector.

 

Connector

Pin No.

Name

Description

Port

 

image-20240912-045150.png

 

1

SDA

Send Data A

COM1

2

RD

Receive Data

COM2

3

TD

Transmit Data

COM2

4

RDA

Receive Data A

COM1

5

SG

Signal Ground

COM1, COM2

6

SDB

Send Data B

COM1

7

RTS

Request To Send

COM2

8

CTS

Clear To Send

COM2

9

RDB

Receive Data B

COM1

● Normal communication is not guaranteed when using USB connector as a communication port in ordinary times.

● In case of RS-485 cable (2wire) connection, connect only both SDA and SDB lines.

● The RS-485 of the Xpanel runs under auto toggle mode.

● To reduce the risk of damaging the RS-422 circuit, be sure to connect the Pin 5(SG) terminal. 

● Normal communication is not guaranteed when using USB connector as a communication port in ordinary times.

● In case of RS-485 cable (2wire) connection, connect only both SDA and SDB lines.

● The RS-485 of the Xpanel runs under auto toggle mode.

● To reduce the risk of damaging the RS-422 circuit, be sure to connect the Pin 5(SG) terminal. 

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