Usbxchange Users Guide

User’s Guide USBXchange™ Copyright © 2000 Adaptec Inc. All rights reserved. The user may print one copy for personal use. Production of multiple copies or copies for sale is strictly prohibited. Reading This Document To read this document 1 Select the hand tool , and click any part of the document. 2 Press Return, or click to progress through the document. While you read the document, the hand tool changes . 3 Continue to press Return, or click until you reach the end of the document. At the end of the document, the hand tool changes . To reverse direction in this document, do any of the following: ♦ Press Shift-click. ♦ Press Shift-Return. The hand tool changes . ♦ To return to the beginning of the document, press Option-click. The hand tool changes . U se r’s G u i de : US B X ch a ng e • 2 Introduction This user’s guide explains how to use the USBXchange to allow SCSI devices to plug into the Universal Serial Bus (USB) port of your PC compatible or Apple Macintosh computer. The SCSI controller in the USBXchange allows you to connect up to seven SCSI devices to your desktop, portable PC, or Macintosh computer. These devices include fixed and removable drives, CD-R/W drives, DVD drives, hard disk drives, magneto-optical (MO) drives, and most scanners. The USBXchange provides transfer rates of up to 1.5 MBps or a maximum sustained rate of 700 KBps. Overview The USBXchange is designed as an integrated adapter with a 50-pin high- density (SCSI-2) connector. For installation, you simply connect the male HD50 SCSI end of the USBXchange to the female HD50 SCSI connector on your SCSI device. See Installing the USBXchange on PC Compatibles on page 5, or Installing the USBXchange on a Macintosh on page 15 for more information. HD50 SCSI connector USB connector USBXchange HD50 SCSI-2 Connector The USBXchange is designed to act as a self-powered device and receives its power from either the termination power line of attached SCSI devices or, if not present, from the USB bus. In some cases, especially when using unpowered USB hubs with attached SCSI devices which do not supply SCSI termination power, the USB bus cannot supply the needed power for the USBXchange to operate. In these cases, you may need an exte…