Interfaces: Connection Between Scanner and Computer

Data is transferred from the scanner’s internal processing to the computer for storage. For this purpose, both scanner and computer must have a common external interface. The usual types of interface for scanners are SCSI, USB, and FireWire. Current models are offered almost exclusively with either USB 2.0 or FireWire. A PC can be upgraded with inexpensive expansion cards if the required interface is not included in the basic package.


In the days before USB 2.0 and FireWire, SCSI was the fastest external interface. Older scanners still use SCSI, but modern units are equipped with the more user-friendly FireWire or USB 2.0. Unlike SCSI, they support plug-and-play.

USB 1.1 und USB 2.0

The Universal ...

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