A high-quality, self-contained USB to RS-485 adapter for use in CCTV, EPOS, industrial control and many other applications.

• FT232RL and SP485 line driver
• USB 1.1 & 2.0 compliant
• Half duplex, non-isolated
• Baud rate: 300-115200bps
• LEDs for Tx/Rx visible through top of connector
  
• Powered from PC via USB, no extra power needed
• 4 way 2.54mm (0.1in) terminal block for RS-485

This adapter uses the highly regarded FTDI FT232RL chip which is guaranteed to work with all current versions of Windows.

Latest drivers available from FTDI here. Driver installation guides are here.