Banner AG4 Series Safety Laser Scanner
3.3 Mechanical Installation Considerations
Many factors influence the layout of the Scanner
’s mechanical installation
. For stationary applications, these include
separation (safety) distance, supplemental safeguarding (hard guarding), unmonitored areas (shadows or areas behind
the Scanner), adjacent Scanners, and the height of the Protective Field (in horizontal applications). In addition, mobile
applications must take into account the stopping performance and distance of the mobile vehicle which the Scanner is
controlling.
3.3.1 Unmonitored Areas
WARNING . . . UNMONITORED AREAS
The area behind the Scanner and near it, on either side (shown in the following figure) is not monitored. Unmonitored areas can create an access
route to the hazard or a blind zone where a person cannot be detected.
Make sure that this unmonitored area is minimized, so that no one can
access this area undetected
(by recessing the Scanner into the machine, using supplemental safeguarding, or using mechanical barriers to
prevent access).
Failure to do so could result in serious bodily injury or death.
Behind and To the Sides of the Scanner
The area behind and on either side the Scanner is not monitored (see Figure 3-1, #3). It must not be possible to walk in
unmonitored areas or otherwise access them. This can be accomplished by recessing the Scanner into the machine,
using supplemental safeguarding, or using mechanical barriers to prevent access. If there is a possibility that the
Scanner could be used as a climbing aid or standing surface, use a physical cover set at an angle over the Scanner (see
Figure 3-2, #3).
Special attention to these areas must be addressed in vertical Protective Field applications so that the resolution at the
edges of the Protective Field does not increase. If an increased resolution cannot be prevented, then the worst-case
resolution must be used to determine the
Dpf
(U.S. formula) or the
C factor
(European formula) in the safety distance
calculation (see Sections 3.3.4 and 3.3.5).
1
Scanner
2
PF
3
Unmonitored area
Figure 3-1. Protective Field
–
Unmonitored Areas
WARNING . . . POSITION COMPONENTS CAREFULLY
The Scanner must be positioned such that the hazard cannot be accessed by reaching over, under, around or through the sensing field. Additional
guarding may be required; see Safety distance, Section 3.3.4-5, Pass-Through Hazards, Section 3.3.6, and Supplemental Safeguarding, Section
3.3.8.
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