QUATECH ESU2-100 8 port USB to RS-232 Serial Adapter w/DB9M (Models: ESU2-100, ESU2-100IND)

You can now broaden the range of external peripherals used on your computer at higher speed rates than the USB 1.1 series, with the introduction of the High Speed USB 2.0 Serial Adapters. The USB 2.0 has more bandwidth that allows higher data rates on the serial ports for more efficiency.
* USB 2.0 version of Quatech's reliable USB Serial Adapters
* 1, 2, 4 or 8 independent ports
* USB to RS-232 or USB RS-232/422/485 (MEI) available
* On 400 models, each port configurable for RS-232, RS-422 or RS-485
* Device enumerates itself as standard port(s)
* Full modem control and hardware and software flow control (RS-232)
* Full-duplex or half-duplex modes (RS-232/422/485)
* Bus powered, no external power required
* Windows 2000/XP/Vista and Linux
* Surge suppression available
* Embedded High Speed USB Serial Adapters available upon request (Version 1.1 available)
* RoHS compliant
* USB 1.1 versions also available
* New! USB to RS-422/485 Converter
* Auto detect between RS-485 and RS-422
* 5 year warranty