DANGER
Hazard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of
non-observance.
b
Make sure that the following construction requirements are met so that the safe
multibeam scanner can fulfill its protective function.
°
If people can stay between the protective device and the hazardous point
without being detected, check if additional protective measures (e.g., restart
interlock) are required.
4.3.7.1
In access protection, the minimum distance typically defines the position at which the
safe multibeam scanner is mounted.
The protective field must be defined according to the following specifications:
•
The distance between the reference plane (floor) and the lower edge of the protec‐
tive field must not exceed 300 mm.
•
The distance between the reference plane (floor) and the upper edge of the pro‐
tective field must satisfy the following minimum values depending on the object
resolution:
°
Object resolution 150 mm: 1,100 mm
°
Object resolution 200 mm: 1,400 mm
•
The generally required protective field supplement (tolerance zone TZ,
) must be considered.
•
If background objects are to be expected in the protective field level at a distance
≤ 250 mm from the protective field, the Z
E
supplement may have to be taken
into account (
supplement for background-related measurement error",
).
For access protection, only single sampling (multiple sampling = 1) must be set up for
the protective field. Otherwise a person could walk undetected through the protective
field.
4.3.7.2
Z
E
supplement for background-related measurement error
The Z
E
supplement is 220 mm and extends the tolerance zone TZ of the protective
field. The Z
E
supplement must be taken into account if the following two circumstances
apply:
•
A background object in the protective field level at a distance of ≤ 250 mm from
the protective field is to be expected.
•
At least one distance value of the 32 segments exceeds the value listed in the
following table. For each created field, you can check the distance values of all 32
segments in the configuration report (
see "Report (Safety Designer)", page 82
Table 4: Maximum distance value without interference by background objects
Object resolution (mm)
Maximum distance value (mm)
50
280
70
400
150
850
200
1140
The Z
E
supplement must be taken into account in addition to the generally required tol‐
erance zone TZ (100 mm). In sum, this results in a required protective field supplement
of 320 mm for the relevant applications.
4
PROJECT PLANNING
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