SLC 210 / SLG 210
12
MULTIPLE SYSTEMS
When more than one SLC 210 / SLG 210 system is used, precautions must be taken to
avoid optical interference between them: install units so that the beam emitted by the Emitter
of one system can only be received by the relative Receiver.
Figure 11 illustrates some examples of correct positioning when two photoelectric systems
are installed. Incorrect positioning could generate interference, and may result in
malfunctioning.
Figure 10
Whenever it is possible (depending on the application), we suggest to utilize the models with
a working range of 6 m.
DISTANCE BETWEEN REFLECTING SURFACES
The presence of reflecting surfaces in proximity of the photoelectric barrier may generate
spurious reflections that prevent monitoring. With reference to Figure 12, object
A
is not
detected because surface
S
reflects the beam and closes the optical path between the
Emitter and Receiver.
A minimum distance
d
(distance between A and surface S) 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 ±4°.
Figure 11
Systems installed alongside each other: A
Installation of two adjacent Emitters
Overlapping systems: B
L-shaped installation: C
Crossed positioning of Emitters
and receivers