Rockwell Automation 2755-L7, -L9 Scanners - Manual (Page 11)

Chapter 2
Product Description
2–4
Laser Shut Off – Use this switch to enable/disable the laser beam without
interrupting power. The upward position (ON) enables the laser, the
downward position (OFF) disables the laser beam. The use of this feature is
covered in Chapter 5, Operation.
LED indicators – There are two LEDs on the back of the scan head, Power
On and Valid Read. They are defined in Figure 2.4.
Figure 2.4
Scan Head Features
NEMA 4 Case – Both the L7 and L9 scan heads are housed in gasketed,
NEMA 4, aluminum cases.
Replaceable Scan Windows – You can easily remove and replace the scan
windows. Both the L7 and L9 scan heads are shipped with coated, optical
quality, glass windows. Coated, low loss, optical quality, plastic windows
are also available for special applications, or when required by FDA
regulations. The use of this feature is covered in Chapter 6, Maintenance
and Troubleshooting.
Package Detector Port – Connect the optional Package Detector Assembly
(Catalog No. 2755–NP3, or NP5) to this port to allow the scan head to be
turned on only when there is a package present.
The use of this feature is
covered in Chapter 4, Installation.
Scan Width Adjustment – This four position switch is located behind a
gasketed 1/4–20 screw. Rotate this switch, using the supplied tool, to set the
scan width to one of four settings: full,
, , .
Examples of this feature are
covered in Chapter 5, Operation.
Raster Height Adjustment – This four position switch is located behind a
gasketed 1/4–20 screw. Rotate this four position switch to increase/decrease
the height of your raster scanning pattern (on L7R and L9R only). Examples
of this feature are covered in Chapter 5, Operation.
Features