USB to RS485 RS422 4-Wire Interface Adapter, CH340 chip
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USB – RS485 serial port adapter, 4-wire interface (symmetric). An advanced 4-wire USB to serial RS485 / RS422 port converter for communication up to 4000 ft distance, and max. 115kbps transfer speed.
If you need an asymmetric 2-wire RS485 connection, we recommend our CH340-based 2-wire RS485 USB interface.
We recommend downloading the required USB driver for your operating system from WCH official website.
Specification: USB to RS485 RS422 4-Wire Interface Adapter, CH340 chip