4.3.4 Protection against interference from systems in close proximity to each other
Overview
Figure 13: 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.
Important information
DANGER
H
azard due to lack of effectiveness of the protective device
The integrated laser alignment aid may influence the receiver of a safety light curtain in
close proximity. In such cases, the neighboring safety light curtain may not detect per‐
sons 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 receiver. The laser beam must not hit any
external receiver should the integrated laser alignment aid be switched on by mis‐
take or due to a fault. An external receiver is a receiver 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 receiver.
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
•
Reversed direction of transmission for neighboring systems
•
Optically opaque partitions
Further topics
•
"Using beam coding", page 30
•
"Using reversed direction of transmission", page 30
PROJECT PLANNING 4
8022883/2019-03-07 | SICK O P E R A T I N G I N S T R U C T I O N S | deTec4 Ex
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Subject to change without notice
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