Novus USB-i485 USB Converter To Dual RS485 Isolated Ports

When connected to a PC USB port the USB-i485 module is automatically detected and is installed as a native COM port which is compatible with any existing serial communication application. 1500 Vdc galvanic isolation between the USB port and RS485/RS422 protects the PC from spikes or possible misconnections in the communication bus.

eBay