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GridScan/Pro SI
6.1
Door blanking
The GridScan/Pro SI can differentiate between a light beam interruption caused by an object and a light beam interruption
caused by the closing door. The GridScan/Pro SI does this by analyzing the different interruption patterns.
Closing door interruption pattern:
The light beam interruption of a closing door starts at the topmost beam going downwards. There are two ways to achieve
blanking:
GridScan/Pro edge
Optical element
Min. height of
the lower end
of the door
Figure 9.1
Door blanking through door edge
When the GridScan/Pro SI is integrated into the guide
rail, the door moves directly in front of the light curtain.
This means the lowest section of the door needs to be at
least 30 mm in height to ensure that at least one element
is completely covered. It is also essential that the door's
leading edge extends the full distance between the light
curtain's emitter and receiver (Figure 9.1).
7.
Installation
WARNING
Electrical and mechanical hazards
Electrical shock and unexpected door movement
can cause serious injury or death.
Follow all applicable safety measures.
Use only specific and approved tools.
If the GridScan/Pro SI has to be adjusted, the
main power supply must be switched off and
marked as out of service.
© CEDES | V 1.0
GridScan/Pro edge
Optical element
Min. distance always
covered by the
beamblocker
Figure 9.2
Door blanking through beam blocker
If the light curtain is located either in front of or behind the
guide rail, the descending door will not interrupt the active
beams. However, blanking may still be required if any part
of the door (e.g. cable) interrupts the light curtain. A beam
blocker can be used, but it must be mounted so that at least
one element is continuously covered during door closure
(Figure 9.2).
NOTICE
Mechanical damage to the
GridScan/Pro SI
Do not drill additional holes into the light
curtain.
Do not overtighten the mounting screws.
Mount the edges on a flat surface.
English
7
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