● 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 |
 | 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. |
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