4.3.5
Protection against interference from systems in close proximity to each other
Overview
s
r
s
r
!
"
Figure 18: Preventing mutual interference from system
!
and system
"
The infrared light beams of the sender unit of system
!
can interfere with the receiver
unit of system
"
. This can disrupt the protective function of system
"
. This would
mean that the operator is at risk.
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
The external laser alignment aid may influence the receiver unit of a safety light curtain
in close proximity. In such cases, the neighboring safety light curtain may not detect
persons or parts of the body that require protection.
b
Perform an alignment or take other measures to ensure that the laser beam only
hits the front screen of the relevant twin stick. An external twin stick is a twin stick
that is not part of the same safety light curtain or same cascade.
b
During alignment in particular, make sure that the laser beam does not hit any
external twin stick.
DANGER
Hazard due to lack of effectiveness of the protective device
Systems of safety light curtains that operate in close proximity to each other can inter‐
fere with each other.
b
Use appropriate measures to prevent systems in close proximity from interfering
with each other.
Preventing interference between systems in close proximity to each other
The following measures prevent interference from systems in close proximity:
•
Different beam coding for neighboring systems
•
Optically opaque partitions
Further topics
•
4
PROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | miniTwin4
8012624/10OM/2018-08-09 | SICK
Subject to change without notice
