Distance Between Reflecting Surfaces - WEG LSP Serie Manual Del Usuario

Option Kits and Accessories
R
E
E

6.2.1 Distance Between Reflecting Surfaces

The presence of reflecting surfaces in proximity of the photoelectric barrier may generate
spurious reflections that prevent monitoring. In reference to figure below, object is not detected
because surface reflects the beam and closes the optical path between the emitter and receiver.
A minimum distance must therefore be maintained between any reflecting surfaces and the
protected area. The minimum distance "d" must be calculated according to the distance "L"
between the emitter and the receiver, considering that the angle of projection and reception is 5°.
Emitter
30 | LSP
d
Hazardous area
d = Minimum safety distance
Figure 6.10: Mirror and LSP combination
L
L
Opaque object
Reflective surface
Figure 6.11: Distance of reflective surface
d
d
Receiver
d
d
d
E