SIIG’s 4-port Industrial USB to 422/485 Serial Adapter with 3KV Isolation is a high quality industrial USB plug-and-play adapter designed to add four RS-422/485 ports to desktop or notebook computers. This industrial USB to serial adapter supports serial port data transfer rates up to 230 Kb/s. It features built-in 4KB FIFO buffer, auto data flow control, 15KV DC ESD serial interface protection, and 3KV optical isolation to protect the unit from ground loop noise and unforeseen power surges. The 4-port Industrial USB to 422/485 Serial Adapter with 3KV Isolation is the ideal solution for connecting industrial devices such as laboratory testing and measuring equipment, monitoring devices, material handling equipment, and many more. This USB to RS-422/485 serial adapter is compliant with USB specification, revision 2.0, comes with FCC and CE regulatory approvals, and meets RoHS hazardous materials standards. Additionally, it is fully compatible with a wide variety of Windows and Mac operating systems and is backed by SIIG’s limited 3-year warranty.