Barcode reader VB34
Glossary
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Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: G49 621 776-0 • USA +1 330 4253555 • Sin65 67799091 • Internet http://www.pepperl-fuchs.com
Interface
A device connection that can be used externally with standardized electrical
characteristic values, signal characteristics and meanings of the exchanged signals.
Serial interface
An I/O interface for connecting the reader to a computer, often can be recognized by
a 9 or 25-pin connector.
Signal
An impulse or a variable electrical size (e.g. a voltage or a current), whose changes
express a piece of information.
Step-a-Head™
Step-a-Head™ makes it possible to turn the head of the reader and decoder base
assembly independently from one another. A result of the Step-a-Head™ technology
is that the VB34 can always be installed in the ideal position. In this instance, it is
possible to change the alignment of the connector plugs, while the laser window
retains its original position.
Symbol
A combination of characters including start and stop as well as check sum digits
according to requirement, which together form a machine readable barcode.
Trigger signal
A signal, which generally comes from a light barrier or a proximity switch, informing
the reader that there is an object in its reading field.
UPC
An abbreviation for Universal Product Code, the standard barcode type for retail
packaging in the USA.
Full-duplex
Simultaneous and independent exchange of data in both transmission directions.