SG4-H
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2.2 GENERAL INFORMATION ON DEVICE POSITIONING
The safety light curtain should be carefully positioned in order to provide the necessary protection. Access to the
dangerous area must only be possible by passing through the protecting safety light beams.
Fig 7 - Wrong light curtain positioning
Fig 8 - Correct light curtain positioning
Under standard operating conditions, machine starting must not be possible while operators are inside the
dangerous area.
Where it is not possible to install safety light curtain very near to the dangerous zone, a second light curtain must
be mounted in a horizontal position in order to prevent any lateral access, as shown in
Fig 9 - Wrong light curtain positioning
Fig 10 - Correct light curtain positioning
Fig 7 - page 15 shows some examples of possible access to the machine from the top
and the bottom sides. These situations may be very dangerous and so the installation
of the safety light curtain at sufficient height in order to completely cover the access to
the dangerous area (Fig 8 - page 15) becomes necessary.
If the operator is able to enter in the dangerous area, an additional mechanical
protection must be mounted to prevent the access.
