10 8540573 • 16/09/2016 • Rev.20
Knowing the shape and dimensions of the dangerous area, it is possible to assess the width and
height of its access area:
Compare these dimensions with the maximum useful range and the height of the area
protected of the model used.
Before positioning the safety device, take into account the following general indications:
Check that the temperature of the environments where the system is installed is
compatible with the temperature operating parameters indicated in the technical data.
Do not position the Emitter and Receiver close to sources of bright light or high intensity
flashing lights.
Particular environmental conditions may impair the detection efficiency of light curtains. In
places with the possibility of mist, rain, fumes or dust, for correct functioning of the
equipment it is advisable to apply suitable correction factors Fc to the values of useful
operating range.
In these cases:
Pu = Pm x Fc
where Pu and Pm are respectively the useful and maximum operating range in meters.
The recommended Fc factors are indicated in the table below.
Table 2
If the device is installed in areas liable to sudden changes in temperature, suitable
measures must be taken in order to avoid formation of condensation on the lenses which
could impair detection efficiency.
If JANUS light curtains are used with palletizers, depalletizers and stacking/destacking
machines for empty pallets, refer to European standard EN 415-4.
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