SCSI Setup

For some PCs, you must first install a SCSI board in your computer. All Macintosh computers have built-in SCSI ports; you do not need to install a SCSI board. Follow the directions below to connect the scanner to your PC or Macintosh.

SCSI connections

The SCSI interface allows you to connect up to eight devices, including the computer, in a “daisy chain” arrangement. Only the first SCSI device in a daisy chain is connected to the computer; each of the other devices is connected to the previous device.

Each device has a SCSI ID number: the computer is usually number 7, and each of the other devices must have a different number between 0 and 6. Also, the first device and the last device in the chain (not including the computer) must have terminators. If any other devices in the chain have terminators, the terminators must be turned off. The scanner has two 50-pin SCSI connectors and a built-in terminator that you can turn on or off.

Setting the SCSI ID number

The factory-set SCSI ID number of the scanner is 2. The computer’s SCSI ID number is usually 7. If one of the SCSI devices in your system already has the SCSI ID number 2, change the scanner’s SCSI ID number to an unused number as described on the next page.

1-8Setting Up the Scanner