Epson GT-12000 User Manual page 23

SCSI ID number setting
The factory-set SCSI ID of the scanner is 2. The computer is
usually ID number 7. If you are going to add the scanner to a
system in which one of your SCSI devices already has a SCSI
ID of 2, change the ID number of the scanner to an unused
number as described below.
1. Locate the SCSI ID rotary switch on the rear panel of the
scanner.
2. To change the SCSI ID, turn the dial to the desired number.
c
Caution:
Do not set the SCSI ID to an ID number that is already
assigned to another device. The computer, scanner, and
other devices will not function properly.
Setting Up the Scanner
1-9