4.3.4
Protection against interference from systems in close proximity to each other
Overview
!
"
Figure 11: Upset condition 1: Preventing mutual interference from system
!
and system
"
In the figure the infrared light beams of the active unit of system
!
can be reflected by
the passive unit of system
"
and received by the active unit of system
"
. This can dis‐
rupt the protective function of the systems. This would mean that the operator is at risk.
!
"
Figure 12: Upset condition 2: Preventing mutual interference from system
!
and system
"
In the figure, the infrared light beams of the active units of the systems
!
and
"
can
influence each other. This can disrupt the protective function of the systems. This would
mean that the operator is at risk.
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.
Measures
The following measures prevent interference from systems in close proximity
•
Different beam coding for neighboring systems
•
Reversed direction of transmission for neighboring systems
•
Optically opaque partitions
PROJECT PLANNING
4
8024782/2019-11-19 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem4 A/P
25
Subject to change without notice