Determining minimum distance from reflective surfaces
The minimum distance can be determined as follows:
b
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 using
the respective formula to determine the minimum distance to reflective surfaces:
500
400
300
200
100
a/mm
10
11
12
D/m
1
2
3
4
5
6
7
8
9
Figure 11: Graph of minimum distance from reflective surfaces
Table 2: Formula for calculating the minimum distance from reflective surfaces
Distance (D) between sender and
receiver in m
Calculation of the minimum distance (a) from reflective
surfaces in mm
D ≤ 3 m
a = 131 mm
D > 3 m
a = tan (2.5°) × 1,000 mm/m × D = 43.66 × 1 mm/m ×
D
4.3.4
Protection against interference from systems in close proximity to each other
Overview
s
r
s
r
!
"
Figure 12: Preventing mutual interference from system
1
and system
2
The infrared light beams of the sender of system
1
can interfere with the receiver of
system
2
. This can disrupt the protective function of system
2
. This would mean that
the operator is at risk.
Avoid such installation situations or take appropriate action, e.g., install optically opa‐
que partitions or reverse the direction of transmission of a system.
4
PROJECT PLANNING
20
O P E R A T I N G I N S T R U C T I O N S | C4-RD
8025644/19Z2/2021-03-09 | SICK
Subject to change without notice
