Rockwell Automation 2755-L7, -L9 Scanners - Manual (Page 8)

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Product Description
The capabilities of the scan head are described when connected to a Catalog
No. 2755–DM9 Decoder.
The Industrial Medium and High Speed Bar Code Scanners are moving
beam, bar code scan heads designed for use with the Catalog No. 2755–DM9
Decoder. The scanners are available as shown:
•
Side scanning (Catalog No. 2755–L7Sx①, –L9Sx①)
•
Side Raster scanning (Catalog No. 2755–L7Rx①, –L9Rx①)
① The x stands for the different range selections of each scanner. Refer to Figures 2.2 and 2.3.
Scanning is bidirectional at approximately 350 scans per second with an L7,
Industrial Medium–Speed Bar Code Scanner and 800 scans per second with
an L9, Industrial High–Speed Bar Code Scanner. Depending on the scanner
used, symbols can be scanned as near as 3.5 inches (8.9 cm) and as far as 50
inches (127 cm) away.
90–105–9
Figure 2.1
Side Scanning and Raster Scanning
The side scanning model reflects the scanning beam out of the side of the
NEMA 4 case.
The raster scanning model uses a stepping raster motor to project what
appears to be a number of parallel beams out the side of the unit. This type
of scan head is useful when attempting to scan poor quality labels, or labels
that may not always be in exactly the same place.
Chapter Objectives
Overview