DANGER
Hazard due to lack of effectiveness of the protective device
If there is a background object in the protective field level at a distance ≤ 250 mm from
the protective field, it is possible that persons and parts of the body to be protected
may not be detected or not detected in time.
b
Do not mount the safe multibeam scanner within a passageway, but before or
after the passageway.
b
Avoid background objects in the protective field level if possible.
b
With background objects at the protective field level: Increase overrun of the
protective field over the opening to be protected in addition to tolerance zone TZ
by supplement Z
E
= 220 mm.
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:
4
PROJECT PLANNING
26
O P E R A T I N G I N S T R U C T I O N S | scanGrid2 I/O
8025936/2021-01-08 | SICK
Subject to change without notice
