VISION MXL
8
8540687 • 29/03/2010 • Rev.10
POSITIONING OF THE MUTING SENSORS
The Emitter and Receiver of the light curtain must be positioned so as to permit access to the
dangerous area from above, from below and from the sides without first of all intercepting at
least one of the optical beams.
Indications for correct positioning of the light curtain are provided in the figure below:
Figure 8
For correct positioning of sensors 1 and 2, i.e. those that manage enabling and disabling of the
Muting function, take into account the following:
•
the two beams must be crossed and pass diagonally through the zone guarded by
the light curtain;
•
the point of intersection of the two beams must be
in the dangerous area
beyond the light curtain;
•
the angle between the two Muting beams must be calculated according to the size
of the pallet and its speed, taking into account that the Muting function is activated
only if the interception delay between the two sensors is less than 4 seconds;
•
the pallet must interrupt the two beams
before
intercepting the light curtain;
•
the two beams must be interrupted continuously by the pallet for the entire period
during which the pallet passes between the sensors;
•
make sure that the two beams are effectively intercepted by the material on the
pallet and not by the empty pallet;
•
the zone identified by the points of interception and clearing of the beams of
sensors 1 and 2 by pallet
must be limited as far as possible (or suitably
protected)
so as to avoid the possibility of accidental passing through the light
curtain with Muting active (Figure 9).
Figure 9
S1 = Sensor 1
S2 = Sensor 2
R1 = Reflector 1 (or Receiver 1)
R2 = Reflector 2 (or Receiver 2)
B = Light curtain
Material
Dan
gerou
s area
Dimension to be reduced to a minimum
Mechanical guards
Material
DAN
GEROUS
AREA
