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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 |
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COM2: RS-
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232C
This interface is used for the connection between Xpanel and target device via an RS-232C cable.
Connector | Pin No. | Name | Description | Port | |
 | 1 | SDA | Send Data A | COM1- | - |
2 | RD | Receive DataCOM2 | |||
3 | TD | Transmit Data | COM2 | ||
4 | RDA | Receive Data A | COM1 - | - | |
5 | SG | Signal GroundCOM1, COM2 | |||
6 | SDB | Send Data B | COM1 | - | - |
7 | RTS | Request To SendCOM2 | |||
8 | CTS | Clear To SendCOM2 | |||
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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