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...12
stainless steel
0...8,4
aluminium
0...4,8
brass
0...4,8
copper
0...3,6
* Typical values for damping with a reference target of 45 x 45 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.
