Add an R422/485 serial port to your laptop or desktop computer through USB (Universal Serial Bus) The ICUSB422IS 1 Port Metal Industrial USB (Universal Serial Bus) to RS422/RS485 Serial Adapter w/ Isolation connects to a computer using USB (Universal Serial Bus) & means that you can connect any RS-422 or RS-485 serial device via the provided DB9 port or hard-wired to the terminal block. The USB (Universal Serial Bus) to serial adapter features circuit isolation to ensure that sensitive controls & devices will not be damaged while connected, making it a viable solution for connecting costly industrial serial devices. The RS422/485 Converter receives full power via the host USB (Universal Serial Bus) connection, & provides power to the attached serial device without requiring an external power adapter. Designed to provide a durable serial solution, the USB (Universal Serial Bus) to RS422/485 Converter is ruggedly constructed & can be mounted nearly anywhere. Backed by a Star Tech.com 2-year warranty & free lifetime technical support. " * Rugged, USB (Universal Serial Bus) Bus powered enclosure requiring no external power adapter for simple integration into harsh industrial environments * Supports RS-485 & RS-422 serial interfaces via DB9 or Terminal Block connections for versatile connection options * Circuit isolation provides electrical protection for sensitive, & often expensive industrial equipment"