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Surge suppression for USB adapters

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INTERWORLD Electronics has announced the release of a surge suppression option for the FreedomUSB range of multiport USB to serial adapters from Quatech.

This makes the FreedomUSB series more suitable for systems used in industrial and other potentially harsh environments that are subjected to data line surges.

The surge suppression option is available for all Quatech two, four, eight and sixteen port adapters.

While initially designed for consumer oriented desktop applications, USB is becoming one of the leading I/O interfaces for a wide variety of PC-based industrial and commercial applications because of its low cost and Plug & Play capability.

Serial adapters make USB an even more attractive choice for these applications because they enable continued use of legacy peripherals via the USB port.

However, as USB was not created for this type of application, in the past, it ignored the significant problem of data line surges.

For example, in industrial environments surges enter a system via other serial equipment, long cable runs, external antennas or security equipment.

Static voltages can also be transferred to equipment by the materials being processed. In Point Of Sale applications, users can introduce static onto the data line via scanners or card readers.

Quatech's new "IND" option for its USB to serial adapters solves this problem by introducing suppression before the surge hits the device, thus protecting it. Each data line is equipped with a surge suppressor that is capable of sustaining up to 40A peak, 8 x 20ms transient surges, a clamping voltage of 30V (15.5V for RS422/485 lines), and a peak energy dissipation of 0.1 Joules.

Quatech USB to serial adapters accommodate a wide variety of system requirements. RS232 adapters are available in one, two, four, eight and sixteen port versions.

RS422/485 adapters are available with two, four, eight or sixteen ports and are configurable for full-duplex or half-duplex operation. The adapters are supported under Windows 98/Me/NT/2000/XP.

Quatech serial USB adapters offer several attractive features that make them particularly convenient and easy to use.

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