Minimum Distance To Reflective Surfaces - SICK deTec4 Core Operating Instructions Manual

4.3.3

Minimum distance to reflective surfaces

8014253/YST2/2016-04-11 | SICK
Subject to change without notice
DANGER
Hazard due to lack of effectiveness of the protective device
Reflective surfaces and dispersive media can prevent persons or parts of the body to
be protected from being properly reflected and, therefore, remain undetected.
Make sure that all reflective surfaces and objects maintain a minimum distance
b
from the protective field.
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
b
lated minimum distance from the protective field.
The light beams from the sender may be deflected by reflective surfaces and dispersive
media. This may prevent an object from being detected.
All reflective surfaces and objects (e.g., material bins, machine table, etc.) must there‐
fore maintain a minimum distance (a) from the protective field. This minimum distance
(a) must be maintained on all sides of the protective field. This applies in horizontal,
vertical, and diagonal directions, as well as at the end of the safety light curtain. The
same area must be free from dispersive media (e.g., dust, fog, or smoke).
The minimum distance (a) depends on the distance (D) between sender and receiver
(protective field width).
Figure 9: Minimum distance to reflective surfaces
How to determine the minimum distance from reflective surfaces:
Determine the distance between sender and receiver D in meters (m)
b
Read the minimum distance a in millimeters (mm) in the graph or calculate it
b
based on the respective formula from
a/mm
500
400
300
200
100
1 2 3
Figure 10: Graph, minimum distance from reflective surfaces
a
D
table 1:
4 5 6 7
O P E R A T I N G I N S T R U C T I O N S | deTec4 Core
PROJECT PLANNING
8 9 10 11 12 D/m
4
21