Banner AG4 Series Safety Laser Scanner
1 Recessing into the machine
surface
2 PF
3 Physical cover
4 Scanner
5 Machine
Figure 3-2. Recessing into the Machine Contour
"Shadowing" Within the Protective Field
WARNING . . . SHADOWING WITHIN THE PROTECTIVE FIELD
Permanent and moveable objects in the Protective Field can create a shadow that results in an unprotected zone that may provide
an access route to the hazard. Eliminate any unprotected access routes by repositioning the Scanner, installing additional Scanners, or by
adding supplemental safeguarding. Failure to eliminate access routes caused by the shadowing effect could create a potentially
dangerous condition that may lead to serious injury or death.
Objects that are located within the Protective Field create an unmonitored area directly behind the object. This area is
best described as a ―shadow,‖ since the light emitted by the Scanner cannot bend around or penetrate through solid
objects. The shadow effect can be caused by both opaque and transparent objects.
Any unmonitored areas resulting from the shadow effect must not allow unprotected access routes to the hazard. This
can be prevented by repositioning the Scanner, installing additional Scanners, or by adding supplemental safeguarding.
If the object is moveable, such as a scrap bin, do one or more of the following:
Locate the unmonitored area at a greater distance from the hazard than the calculated safety distance (see
Sections 3.3.4-3.3.5),
Identify the object as a reference contour (see Section 1.12.5),
Enable an alternate Field Pair when the object is relocated, or
The moveable object must be interlocked in order to stop and prevent the safeguarded hazard, if the object is
moved.
1 Scanner
2 PF
3 Unmonitored area
4 Obstruction (e.g., a building column)
5 Unmonitored area due to shadow effect
Figure 3-3. A "shadow" within the Protective Field
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