Instruction
Manual
SF2
Series
3
1.2. How to choose the device
There are at least three different main characteristics that should be
considered when choosing a safety light curtain:
•
The resolution
strictly depending on the part of the body to be
protected.
R = 30mm
hand protection
Type 2
R = 50 mm
R = 90 mm
presence control
protection
(*) safety light curtain models with 50 mm and 90 mm resolution present sensitive
areas with inferior resolution with respect to the declared value.
The resolution of the device is the minimum dimension which an
opaque object must have in order to obscure at least one of the beams
that constitute the sensitive area.
As shown in Fig.2, the resolution only depends on the geometrical
characteristics of the lenses, diameter and distance between centres,
and is independent of any environmental and operating condition of
the safety light curtain.
Fig. 2
The resolution value is obtained applying the following formula:
R = I + d