Prerequisites
•
There are no interferences or obstacles in the protective field of the safe multi‐
beam scanner. Where there are unavoidable obstacles, additional protective mea‐
sures are applied.
•
An area with a distance of up to 250 mm from the front screen of the safe
multibeam scanner must be free of objects when switched on. Otherwise, a conta‐
mination error (recoverable error) can occur and the OSSDs will not switch to the
ON state.
•
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.
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 79
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 direct 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. To
avoid mutual interference in all cases, you need to choose a suitable mounting method.
Suitable mounting methods:
b
Offset mounting so that the scan planes are on different planes
b
Slightly inclined, tilted mounting, so that the scan planes intersect one another
PROJECT PLANNING
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8025936/2021-01-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | scanGrid2 I/O
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Subject to change without notice
