SICK nanoScan3

D
H = 875 mm
C
RO
= 850 mm
Figure 16: Protection against reaching over with high scan plane (dimensions in mm)
The necessary supplement to the minimum distance depends on the height of the
protective field’s scan plane. With a low scan plane, the supplement is greater than
with a high scan plane.
Calculating the supplement C
R
O
►
If there is sufficient space in front of the hazardous area, use C
RO
= 1,200mm.
►
If the minimum distance should be as small as possible, calculate C
RO
using the
following formula:
C
R
O
= 1,200mm – (0.4 × H
D
)
where:
°
H
D
= hei
ght of the protective field above the floor in millimeters (mm).
✓
If the result is C
RO
≥850mm, then use the calculated value as supplement C.
✓
If the result is C
RO
<850mm, then use C
RO
= 850mm (this value corresponds to
an arm’s length and is valid as a minimum supplement to protect against reaching
over).
4.3.7.3 Calculation example for the minimum distance
Calculation example of the minimum distance S according to ISO13855
T
he example shows the calculation of the minimum distance S for parallel approach to
the protective field. A different calculation may be required, depending on the applica‐
tion and the ambient conditions (e.g. for a protective field orthogonal to or at any angle
to the direction of approach or an indirect approach).
S = 1,600mm/s × T + TZ + Z
R
+ C
RO
where:
•
S =minimum distance in millimeters (mm)
•
T = stopping/run-down time for the entire system in seconds (s)
(Response time of the safety laser scanner + machine stopping time, incl.
r
esponse time of the machine control system and signal propagation time)
•
T
Z = tolerance zone of the safety laser scanner, see "Data sheet", page 117
4 P
ROJECT 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 | nanoScan3 – EtherNet/IP™ 8027909/2023-02-22 | SICK
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