Avision AVA3 400 - Manual (Page 12)

Scanner Installation
2-3
2.3 SETTING SCSI ID
When you have several devices on a SCSI chain, you may have to
adjust the SCSI ID selector setting at the back of the scanner(See
Figure 2-2). This setting assigns a specific "device ID" to the
scanner. If the ID number is duplicate with an existing SCSI device
on the SCSI chain, please select a new ID#.
Note: The factory setting for the scanner is ID# 6. Usually, ID# 0 is
assigned to an internal hard disk drive, and ID# 7, to SCSI adapter or
host. ID# 8 and #9 are not in use.
2.4 SETTING SCSI TERMINATOR
The scanner is equipped with a built-in terminator switch on the rear
side of the scanner(See also Figure 2-2). Move the switch to the
“on” position to enable the SCSI termination or to the “off” position
to disable the SCSI termination. The SCSI termination ensures the
electrical signal flow through the SCSI chain properly.
As a result, if the scanner is the only or final device connected to
your computer, you should enable your SCSI chain terminate at the
scanner by moving the terminator switch to the “on” position. If your
scanner is linked between the host computer and other SCSI
devices, then the SCSI chain should terminate at the final SCSI
device. In the case, disable your SCSI termination on the scanner
by moving the terminator switch to “off” position.)