4.3.5 Protection against interference from systems in close proximity to each other
Overview
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
H
azard 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
H
azard 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
T
he following measures prevent interference from systems in close proximity:
•
Different beam coding for neighboring systems
•
Optically opaque partitions
Further topics
•
"Using beam coding", page 29
4 P
ROJECT PLANNING
28
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
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