Omron F3SS Instruction Manual page 22

4 Installation
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.
The interruption of the beam is not detected because of reflection. The reflective object is inside the beam angle.
Interruption of the beam is not detected because of reflection. Reflective surfaces interference may also appear
above and below the sensing beam.
This shows minimum distance from reflective surface x to one side of the beam center line.
18
Approach direction
Interruption
Central beam
Emitter
Reflective Surface
Perimeter of danger area
Approach direction
Interruption
Central beam
Emitter
Reflective Surface
Perimeter of danger area
Figure 4-12 Example of Unsafe mounting
Interruption
a
Emitter
Reflective Surface
Perimeter of danger area
Figure 4-13 Example of Unsafe mounting
Operating Range, R
Emitter
Reflective Surface
Perimeter of danger area
Figure 4-14 Worst Case Alignment example
Beam Angle, a
a
Light beam interrupted
Receiver
Beam Angle, a
a
Light beam interrupted
Receiver
Reflection
Sensing Zone
Receiver
Reflection
a
Receiver
a
Beam Angle, a
x
4-8 Physical Mounting