Checklist For Access Or Perimeter Guarding - Siemens SIMATIC FS400 Anleitung

13.2.3 Checklist for access or perimeter guarding

For a SIMATIC FS400 Lichtgitter 3RG7845 light grid (2, 3 or 4 beams) with normal
approach to the protective field.
This checklist is intended as a help tool. It supports but does not serve for the
inspection before initial operation or the regular inspections by an expert.
Has the safety distance been calculated in accordance with the
valid formula for access/perimeter guarding, and has this
minimum distance between protective field and the danger
points been considered?
Has care been taken to ensure that the lowest infrared beam of a
2-beam AOPD is located 400 mm above the reference level, and
that of 3 and 4-beam AOPDs is located 300 mm above the
reference level?
Was it considered during risk assessment that 2-beam AOPDs
mounted above ground level are regarded as being capable of
being crawled under (EN 999)?
If access to the danger points is possible through other routes
than the protective field of the AOPD, are the other access
options suitably secured by other means?
Are transmitter and receiver, and deflecting mirror if required,
fixed against displacement/turning after the alignment?
Are the protective device and the control devices in good
condition?
Are all connectors and connection cables in fault-free
conditions?
Is the start/restart button for resetting the AOPD positioned
outside of the danger area in line with specifications so that it
cannot be reached from inside? Is there a complete overview of
the danger area from the start/restart button position?
Are both of the safety outputs (OSSDs), linked into the
downstream machine control in accordance with the required
safety category?
Are the subsequent circuit elements controlled by the AOPD
monitored by the feedback circuit (EDM), e.g. contactors with
positive-guided contacts or safety valves?
Does the actual integration of the AOPD into the machine control
unit match the circuit diagrams?
Does the AOPD respond correctly when any beam is interrupted
and does the start/restart interlock lock when the beam is
interrupted? This is absolutely necessary, as the access, not the
presence in the danger area is registered!
Does the dangerous movement stop immediately if the supply
voltage of the AOPD is interrupted and is the start/restart button
required to reset the opto-electronic protective device again after
the voltage returns?
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
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