Epson Expression 1640XL Manual page 17

1.
Make sure the scanner, computer, and all other SCSI devices
c
are turned off and unplugged from the power source.
Caution:
Do not connect the scanner to the computer or other devices while they
are turned on as damage may occur.
2.
Connect one end of the interface cable to one of the scanner SCSI connectors until
the locks on both sides snap in.
Note:
To connect the scanner to a PC or any other SCSI device, the total length
of cable in the daisy chain must not exceed 3 meters; otherwise the system
may not work properly.
Make sure no other interface is used.
3.
Connect the other end of the cable to the SCSI port of your computer or another
SCSI device.
Note:
The SCSI port on the Macintosh is the larger port with the SCSI icon over it.
4.
Plug in the power cords of your computer, scanner, and other external SCSI
devices.
Note:
Before turning on your system, be sure to read "Power-on sequence" following.
Power-on sequence
Keep the following in mind every time you turn on your computer and SCSI devices,
including the scanner.
Be sure to turn on the SCSI device which is connected at the farthest end of the
daisy chain first, then the second farthest and so on, until finally your computer.
If you attempt to use a SCSI device which has been turned on after the computer,
it may not work properly, or the computer may not work properly.
Connecting the Scanner to Your Computer
17