Rockwell Automation 2755-L7, -L9 Scanners - Manual (Page 28)

Chapter 4
Installation
4–6
When installing the Package Detector Assembly, we recommend you observe
the following guidelines:
•
Install the Package Detector Switch at an angle to the label to minimize
the light reflecting off the label.
•
Install the reflector so the Package Detector’s operating range is not
exceeded.
•
The Package Detector’s beam must be broken before the label is in
position.
Figure 4.4
Recommended Placement of Package Detector Switch and Reflector.
① The laser beam must not strike the reflector, or you may get inaccurate reads
Scan Head
Package Detector
Switch
Reflector ①
Figure 4.5 specifies which pins on the Package Detector Port Connector
(Catalog No. 2755–NC9) are used.
Figure 4.5
Pins Used on Package Detector Connector
① The package detector input is used to trigger the decoder to start decoding information. The package detect LED
on the Decoder will light when the package detect input is active.
Package
Detector Port
Package Detector Input ①
A
B
C
Common
+ 12V
Note: If you have programmed the decoder to turn the laser ON only upon a
package detect, the laser will be OFF until the package detector is triggered.
Refer to the User’s Manual for your decoder.
Installing the Package Detector
Assembly