The is a high-speed, isolated USB to RS232/RS485 converter designed for industrial communication. To ensure the device functions correctly, you must download and install the appropriate drivers, which are typically based on the Silicon Labs CP210x or FTDI chipset architecture . Abacus Acon U-01 Driver Download Links

RS232, Half-duplex RS485 (2-wire), or Full-duplex RS485 (4-wire). 2: RX, 3: TX, 5: GND. ACON U-01 USB to RS232/RS485 Converter | PDF - Scribd

: For Linux and updated Windows environments, the manufacturer refers users to the Silicon Labs CP210x VCP drivers.

Finding and installing the right driver for specialized hardware like the Abacus ACON U-01