How To Choose The Device - SAFEasy SF2 Series Instruction Manual

Instruction Manual

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
R = 50 mm presence control
R = 90 mm 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.
The resolution value is obtained applying the following formula:
3
SF2 Series
Type 2
Fig. 2
R = I + d