USB to RS485, USB to RS232, RS232 to RS485 Wired Converter Adapter
1pc 3 in 1 USB to RS485 USB to RS232 RS232 to RS485 Converter Adapter with cable. USB, serial port (232) to 485 while. B: 485 via the USB port to monitor the data sent to 232. C: 232 via the USB port to monitor the data sent to 485.