VISION MXL
12
8540687 • 29/03/2010 • Rev.10
MULTIPLE SYSTEMS
When more than one VISION MXL 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 14 illustrates some examples of correct positioning when two photoelectric systems are
installed. Incorrect positioning could generate interference, and may result in malfunctioning.
Figure 14
DISTANCE BETWEEN REFLECTING SURFACES
The presence of reflecting surfaces in proximity of the photoelectric light curtain may generate
spurious reflections that prevent monitoring. With reference to Figure 15, 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
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°.
Figure 15
Figure 16 illustrates the values for the minimum distance
d
that must be maintained when the
distance
l
between the Emitter and Receiver is changed.
Systems installed alongside each other: A
Installation of two adjacent Emitters
Overlapping systems: B
L-shaped installation: C
Crossed positioning of Emitters and Receivers
