● COM1: RS-422/485
This interface is used to connect between Xpanel and target device via an RS-422/485 cable.
Connector | Pin No. | Name | Description |
 | 1 | RDB | Receive Data B |
2 | RDA | Receive Data A | |
3 | GND | Ground | |
4 | SDB | Send Data B | |
5 | SDA | Send Data A |
● COM2: RS-232C
This interface is used for the connection between Xpanel and target device via an RS-232C cable.
Connector | Pin No. | Name | Description |
 | 1 | - | |
2 | RD | Receive Data | |
3 | TD | Transmit Data | |
4 | - | ||
5 | SG | Signal Ground | |
6 | - | - | |
7 | RTS | Request To Send | |
8 | CTS | Clear To Send | |
9 | - | - |
● 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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