7
WARNING
Failure of the safety function
The safe switch-off distance is different if targets which deviate
from the reference target in terms of material, form and size are
used.
u
Check whether the safety-related function of the sensor is
guaranteed under the given operating conditions.
Safe switch-off distance for specific materials*:
Material
Safe switch-off distance s
ao
(mm)
FE360 (ST37)
0...6,5
stainless steel
0...4,6
aluminium
0...2,6
brass
0...2,6
copper
0...2
* Typical values for damping with a reference target of 24 x 24 mm and non-flush
installation to IEC 60947-5-2 at an ambient temperature of 20 °C.
100
S
r
[%]
50
0
0,2
0,5
1,0
x axis: ratio actual target / reference
target
5.2 Switch-on curve Sao
Good repeatability of the switch point means: the closer the target is positioned to
the sensing face, the better.
