Prerequisites
•
There are no interferences or obstacles in the protective field of the safe mul‐
tibeam scanner. Where there are unavoidable obstacles, additional protective
measures are applied.
•
If people can stay between the protective device and the hazardous point without
being detected, additional protective measures (e.g., external restart interlock) are
applied.
•
Reaching under, over and around, crawling beneath and stepping over the safe
multibeam scanner, as well as moving it, are prevented.
Contamination and ambient light diagnostics
Objects at a distance of ≤ 50 mm to the front screen of the safe multibeam scanner
can erroneously lead to contamination messages.
The safe multibeam scanner only performs a contamination or ambient light diagnostic
for those segments of the detection area that are used in at least one configured
monitoring case (
). Segments that are not configured in any
monitoring case are not taken into consideration in the diagnostics.
Complementary information
Certain optical and electromagnetic ambient conditions can affect the safe multibeam
scanner and thus reduce the availability of the machine.
Examples:
•
Condensation on the front screen
•
Strong electrical fields (e.g. welding cables or induction cables)
Further topics
•
•
"Dimensional drawings", page 103
4.3.1
Protection from interference
Interference by lasers
Laser beams from other laser sources can affect the safe multibeam scanner and thus
reduce the availability of the machine.
Measures to increase availability:
b
Avoid foreign laser beams in the scan plane.
b
Set multiple sampling to the highest value permitted in your application, taking the
minimum distances into account.
Interference by strong ambient light
Strong external light sources in the scan plane can affect the safe multibeam scanner
and thus reduce the availability of the machine.
Measures to increase availability:
b
Avoid external light sources in the scan plane.
b
Avoid sunlight in the scan plane.
b
Do not position halogen lights, infrared light sources or stroboscopes directly on
the scan plane.
Mutual interference of safe multibeam scanners
When using several safe multibeam scanners, they can interfere with each other.
You can avoid mutual interference in many cases by setting the configurable multiple
sampling to a value greater than 1.
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PROJECT PLANNING
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