4.4
Design
This chapter contains information about implementing the design of the functional
safety system. Any design-related contents of the relevant operating instructions also
apply. The following information is provided in the operating instructions of the safety
laser scanners and primary protective device in particular:
•
Overall height of the protective field of the primary protective device
•
Height of the lower edge of the protective field of the primary protective device
•
Height of the scan plane of the safety laser scanner
•
Protective field length
•
Protective field width
•
Robot stopping/run-down time
4.4.1
Safety laser scanner
It is recommended to mount the safety laser scanner horizontally so that the scan
plane is 300 mm above the ground. This means a resolution of 70 mm can be used.
If the mounting height is less than 300 mm above the ground, the resolution must be
adjusted to 50 mm and the protective field must be enlarged.
NOTE
At a resolution of 50 mm the maximum size of the protective field is reduced. The man‐
ufacturer must ensure that there is no possibility of avoiding the protective field.
If the height of the scan plane is greater than 300 mm, additional measures must be
taken to prevent crawling beneath.
Depending on the application and the risk assessment, the manufacturer must decide
which safety laser scanner must be used.
The manufacturer must check after the risk assessment whether use of the respective
safety laser scanner and this safety system is suitable for the application in question.
The requirements for use of an automated optical protective device must be met and
the size of the protective field as well as the requirements for the machine design must
be taken into account.
4.4.2
Primary protective device
The protective field of the primary protective device must be oriented vertically and
observe a minimum distance to the hazardous area in accordance with ISO 13588.
The lowest beam of the primary protective device should be ≤ 300 mm above the
ground.
If the safety system is not used in an industrial environment, the lowest beam of the
primary protective device should be ≤ 200 mm above the ground (in accordance with
ISO 16855).
It must not be possible to reach over or reach under the device.
A minimum distance to reflective surfaces must be maintained. The operating instruc‐
tions of the primary protective device must be observed in all cases.
4.4.3
Calculating minimum distance
The minimum distance of the primary protective device to the hazardous area must be
calculated in accordance with ISO 13855. The manufacturer of the machine must cal‐
culate the minimum distance for the entire machine.
The minimum distance to the hazardous area (S
total
) depends on the following factors:
4
PROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | sBot Stop
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Subject to change without notice