B+B SmartWorx 232USB9M Data Transfer Adapter - B&B USB TO SERIAL 1 PORT RS 232 WITH DB9M 1 x Type B USB 2.0 USB Male 1 x 9 pin DB 9 RS 232 Serial Male 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.