Gearmo FTDI Chip USB to RS485/RS422 Industrial Isolated with DB-9/RJ45/Terminal Screw Industrial grade, DIN mountable, isolated USB to RS485 / RS422 converter with aluminum housing ideal for any industrial and commercial application This unit is powered from the USB port so no additional external power supply is needed. The serial RS485 / RS422 interface offers three different connector types: RJ45 socket, DB9 connector and screw terminal header, which makes this unit campatible with the majority of industrial interface connectors. Optical isolators and Transient Voltage Suppressors (TVS) effectively isolates and protects your data signals and your equipment from dangerous high voltage spikes, surges, ground loops and static electricity with up to 2500Vrms/600W and 15KV EDS protecti This converter is built around the highly reliable and effective FT232RL chipset from FTDI, which ensures 100% compatibility with all versions of Windows, Linux and Mac.