4-8 Physical Mounting
4 Installation
18
The following four figures illustrate correct and incorrect mounting for reflective surfaces.
Figure 4-11 Example of correct mounting with proper alignment.
In this example, the interruption of the beam is clearly detected. The reflective object is outside of the beam an-
gle.
Figure 4-12 Example of Unsafe mounting
The interruption of the beam is not detected because of reflection. The reflective object is inside the beam angle.
Figure 4-13 Example of Unsafe mounting
Interruption of the beam is not detected because of reflection. Reflective surfaces interference may also appear
above and below the sensing beam.
Figure 4-14 Worst Case Alignment example
This shows minimum distance from reflective surface x to one side of the beam center line.
Emitter
Receiver
Approach direction
Central beam
Light beam interrupted
Reflective Surface
Perimeter of danger area
Interruption
a
Beam Angle, a
Emitter
Receiver
Approach direction
Central beam
Light beam interrupted
Reflective Surface
Perimeter of danger area
Reflection
Interruption
a
Beam Angle, a
Emitter
Receiver
Reflective Surface
Perimeter of danger area
Reflection
Interruption
a
Sensing Zone
Emitter
Receiver
Beam Angle, a
x
Reflective Surface
Operating Range, R
a
a
Perimeter of danger area
Summary of Contents for F3SS
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