8540573 • 16/09/2016 • Rev.20 11
POSITIONING
Protection of the guarded opening by JANUS must be integrated with suitable mechanical
guards.
While the "MI" model permits various types of installation (2, 4 sensors, one- or two-way), the
"ML" and "MT" have been designed for "dedicated" use.
In particular, "ML" manages the muting function in one-way mode (normally for
pallet exit); in this case, the horizontal arms must be positioned between the
dangerous area and the light curtain.
The "MT" model manages the muting function in two-way mode using four horizontal
arms. This model is useful when the pallets, once the process has been carried out
by the dangerous machine, must be returned outside using the same palletizer.
POSITIONING OF THE MUTING SENSORS ("MI" SERIES).
2 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 11
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
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