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Operating Instructions
Chapter
5
C4000 Select
8012247/RI61/2007-11-30
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
33
Installation and mounting
Example
Stopping/run-down time of the machine = 290 ms
Response time after light path interruption = 30 ms
Resolution of the light curtain = 30 mm
T
= 290 ms + 30 ms = 320 ms = 0.32 s
D
s
= 2000 × 0.32 + 8 × (30 – 14) = 768 mm
D
s
> 500 mm, therefore:
D
s
= 1600 × 0.32 + 8 × (30 – 14) = 640 mm (25.2 inches)
5.1.5
Minimum distance to reflective surfaces
Maintain the minimum distance from reflective surfaces!
The light beams from the sender may be deflected by reflective surfaces. This can result in
failure to identify personnel infringing on the protective device causing an operator to be at
risk. Ensure that your application adheres to the required minimum distance to reflective
surfaces.
All reflective surfaces and objects (e.g. material bins) must be a minimum distance
a
from
the light path between sender and receiver. The minimum distance
a
depends on the
distance
D
between sender and receiver.
The field of view of the sender and receiver optics is identical.
WARNING
Fig. 19: Minimum distance to
reflective surfaces
Note
Reflective surface
Field of view
Minimum distance a
Distance D sender–receiver