Epson Perfection 640U Series Manuel - Sayfa 8

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Epson Perfection 640U Series Manuel
Performance—High-Performance Interfaces
In general, Epson scanners targeted to home and small office users have a USB interface for maximum ease
of use. Epson scanners targeted to corporate and graphic arts uses have USB and/or SCSI-2 interfaces for
maximum performance. An optional interface for some scanners is the IEEE-1394 (FireWire
The key differences between the scanner interfaces are:
Key Differences USB 1.1/2.0
Macintosh
connection
PC connection
Daisy chaining
Hot plugging*
Performance
* Hot plugging allows you to attach or detach the cable without powering off/on the scanner or computer.
Most Epson scanners that include a USB port offer the newer USB 2.0 (Hi-Speed USB).
Hi-Speed USB is backward compatible with USB 1.1, so if you have an older computer with a USB
port, it will work with a new Epson scanner.
You will see only the highest speeds on your scanner if you have a Hi-Speed USB port on both your
computer and your scanner.
Performance—Batch Scanning
Epson scanning software supports batch
scanning:
Without batch scanning, you must scan
each image separately.
With batch scanning you can define
customized settings for each framed
original, then capture each one as a
separate file—all with one scan.
Flexibility—Intelligent Negative Scanning
With a transparency unit attached, Epson scanners can
scan color negatives (such as 35mm negative strips) and
convert them directly to positive images.
Some other scanners can only scan positive
transparent media, such as color transparencies
and slides.
Scanner Technical Brief—Page 8
Direct connection to
USB-ready Macintosh
computers
Direct connection to
USB port
Yes, up to 127 devices
via USB hub
Yes
Up to 1.5/60 MBps
SCSI-2 narrow/wide
Direct connection to SCSI
port or installed Fast SCSI
PCI interface card
Requires Fast SCSI PCI in-
terface card
Yes, up to 8 devices
No
Up to 10/20 MBps
Place originals on
the scanning bed
Negative
) interface.
®
FireWire
Direct connection to FireWire-
ready Power Macintosh comput-
ers and to any PCI Macintosh
with an Apple
®
FireWire Kit
Direct connection to FireWire
port or an installed FireWire card
Yes, up to 63 devices
Yes
Up to 50 MBps
Select and define frames in
the scanner driver, and scan!
Positive
to
6/07