Rockwell Automation 2755 2D Hand-Held Scanner - Manual (Page 13)

1–2 Scanner Features
Publication 2755-6.4
Scanner Features
The 2-D scanner emits a raster scanning pattern which is capable of
scanning both:
•
One-dimensional bar codes
•
Two-dimensional bar codes (PDF417 bar codes)
The scanners use a low power visible (red) laser diode for scanning,
which can read color bar codes and symbols printed on just about
any substrate. The trigger turns on the laser which scans a label at
approximately 560 scans per second.
Trigger
Cable Connector
LEDs
The laser beam:
•
exits through the scan window
•
reflects off the label back through the window
•
is detected by a sensor in the scanner
When a label is read, the laser beam is automatically turned off until
the trigger is pressed again. If no label is read, the laser beam
automatically turns off after 0.5 to 3 seconds (timeout is adjustable)
and remains off until the trigger is released and pressed again.