B&B USB TO SERIAL 1 PORT RS-485, 2 WIRE WITH DB9F - 1 x Type B USB 2.0 USB Female - 1 x 9-pin DB-9 RS-485 Serial Female - 1

These compact USB to Asynchronous Serial RS-232 and
RS-485 mini-converters allow you to add a serial port to your USB only PC. They are perfect connecting to a remote device to gather data or upload a program. USB 2.0 compatibility makes installing them on your PC easy. Versions are available with DB9 connectors and Terminal Blocks for quick wiring. We support RS-232, RS-485
(2-Wire) and RS-485 (4-Wire) protocols. Need 5 Volt and 3.3 Volt TTL? We even have a converter for that. Our driver software supports operating systems up to Windows 7 with 32 and 64 bit support.