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Embedded USB Serial Adapters 

embedded usb serial adapters image

US Prices
CDN Prices

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  • 4 or 8 independent ports
  • RS-232 or RS-422/485 serial interface
  • Device enumerates itself as standard ports
  • Surge suppression at each port
  • Max baud rate 230.4 kbps
  • Full modem control and hardware and software flow control for RS-232
  • Full-duplex or half-duplex modes for RS-422/485
  • Bus powered, no external power required
  • Windows 98/Me/NT/2000/XP and Linux support
  • 5 year warranty


Quatech Embedded USB Serial Adapters are designed to seamlessly connect multiple serial peripherals via a single USB port. This enables manufacturers and integrators to easily incorporate multiple serial interface devices such as keypads, displays, card readers, and printers into custom enclosures that lack native serial support without changing software written for serial port communications.

Available with 4 or 8 independent ports, the small-footprint boards have built-in surge suppression at each serial port, necessary for maximum reliability and robustness. Mounting holes allow easy installation into cabinets and kiosks. For maximum flexibility, each port on 200/300 models can be configured as RS-422 or RS-485 in any combination, meaning a single adapter can be used to implement multiple full-duplex and half-duplex multi-drop networks.

All Quatech Embedded USB Serial Adapters are USB port-powered, provide data rates up to 230.4 kpbs, and are compatible with Windows® 98, Me, NT, 2000, XP and Linux.

USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.663.6001 or 1.416.623.6900
Address: 3075 14th Ave, Unit 219,
Markham, Ontario L3R 0G9