3 in1 USB-232-485 USB TO RS485 / USB TO RS232 / 232 TO 485 converter adapter

1pc 3 in 1 USB to RS485 USB to RS232 RS232 to RS485 Converter Adapter with cable. serial (232) to 485. 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.

eBay