Adaptec XHub4 User Guide - Page 21

XHub for Notebooks User's Guide Maximizing XHub Performance For your XHub for Notebooks to operate at optimum speed, it must be connected to a USB 2.0 port, and USB 2.0 driver software with hub support must be installed on your computer. Note: Macintosh users-There are currently no USB 2.0 drivers for the Macintosh OS, and USB 2.0 PCI cards will not work on Macintosh systems. Your XHub for Notebooks will operate at USB 1.1 speeds. If your computer does not have a built-in USB 2.0 port, we recommend connecting the XHub for Notebooks to an Adaptec USB 2.0 card for the highest-quality USB 2.0 connection. (For information on USB 2.0 adapters, go to the Adaptec website at www.adaptec.com.) USB 2.0 drivers with hub support can be found on the XHub for Notebooks CD included in your kit. See Installing Drivers on page 5 for more information. Technical Specifications USB Compliant Version Number of USB Ports Operating Temperature Power Source Power Adapter Input Power Adapter Output USB 2.0, USB Hi-Speed Certified 4 0 °C - 40 °C Self-powered AC 100 V - 240 V, 50 Hz/60 Hz DC 5 V/2.6 A Note: The XHub for Notebooks can operate without a power adapter if it is connected to a bus-powered USB device, such as a mouse, keyboard, or zip drive. However, if the total power consumption of the USB devices connected to the XHub exceeds 490 mA, a power adapter must be used. Use Adaptec USBControl to determine the power consumption of your devices. Refer to USBControl online help for more information. 12