Tripp Lite USB to Serial Adapter Converter RS-422/RS-485 USB to DB9 2-Port

Tripp Lite USB to Serial Adapter Converter RS-422/RS-485 USB to DB9 4-Port

Tripp Lite Part# U208-004-IND

Serial/Parallel I/O Adapters – Serial Hub - 4 Serial Ports (External) - External - U208-004-IND - USB Type B - Malaysia - 0.9" Height - 6.8" Width - 2.4" Depth - PC - Mac - Linux - U208-004-IND RS422/485 USB to Serial FTDI Adapter ...