10
20
30
40
50
60
70
D
/m
1000
2000
4000
3000
5000
6000
7000
a
/mm
262
3
Figure 9: Graph, minimum distance from reflective surfaces
Table 2: Formula for calculating the minimum distance from reflective surfaces
Distance between sender and
receiver D in m
Calculating the minimum distance from reflective sur‐
faces a in mm
D ≤ 3 m
a = 262 mm
D > 3 m
a = tan (5°) × 1,000 mm/m × D = 87.49 × 1 mm/m × D
4.3.3
Protection against interference from systems in close proximity to each other
Overview
s
r
s
r
!
"
Figure 10: 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
opaque partitions or reverse the direction of transmission of a system.
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
Systems of multiple light beam safety devices in close proximity to each other can
mutually interfere with each other.
b
Use suitable measures to prevent interference between systems in close proximity
to each other.
PROJECT PLANNING
4
8021554/14Q7/2020-04-27 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem2 Core IP69K
19
Subject to change without notice
