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Setting the SCSI ID number and termination
You may not need this step. You can skip this topic if
m the scanner is the only external SCSI device to be connected to your
Macintosh
or
m you’re setting the scanner up as the last device in a SCSI chain
If you need to change the SCSI ID number or termination setting, do so after
you review this topic and before you connect any cables.
About the SCSI ID number
A SCSI ID selector on the back of the scanner identifies the Macintosh port
through which scanner information travels. The SCSI ID number is preset to
2. This factory setting is valid if you have no other SCSI device occupying
SCSI ID number 2.
You can change the SCSI ID number if your configuration requires a different
number.
Numbers to avoid: Don’t assign numbers 0, 3, or 7 to the scanner. The default
setting for the Macintosh computer is 7. The default setting for an internal
CD-ROM player is 3. The default setting for the internal hard disk drive
inside your Macintosh is 0. Make sure you use a number that is not assigned
to any other SCSI device. Each ID number must be unique.
SCSI ID selector
switch set to 2 “on”
(default setting)
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
2
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
To choose a SCSI ID with
termination on, use the
“I” side of the dial. To
choose a SCSI ID with
termination off, use the
“O” side. The ID numbers
are the same on
both sides.
12
Chapter 2