Rockwell Automation 442L-SFZNMN SafeZone Mini Safety Laser Scanner User Manual User Manual
Page 34
32
Rockwell Automation Publication 10000337275 Ver 01—October 2014
Chapter 5
Mounting
Supplement Z
R
for measurement errors caused by reflection
With retroreflectors in the background at a distance of less than 1 m (39.4 in.) from the boundary of the protective field,
the supplement Z
R
is 200 mm (7.87 in.).
Supplement Z
F
due to lack of ground clearance
This supplement is necessary because a person is generally detected above the foot and the braking action can therefore
not take into account the length of the foot in front of the detection point. If a vehicle has no ground clearance, a person
may receive foot injuries.
Fig. 22: Supplement due to lack of ground clearance
The flat rate supplement for ground clearance below 120 mm (4.7 in.) is 150 mm (5.91 in.). This supplement can be
further reduced in specific cases. For this purpose read off the actual supplement necessary for the ground clearance of
your vehicle from the diagram below:
Fig. 23: Diagram of ground clearance of the vehicle
Protective field width
The width of the protective field must cover the width of the vehicle and the supplements for the measurement error and
the lack of ground clearance.
How to calculate the protective field width S
B
(see EN ISO 13855):
Calculate the protective field width S
B
using the formula:
S
B
= F
B
+ 2 × (Z
G
+ Z
R
+ Z
F
)
Where …
F
B
= Vehicle width
Z
G
= General safety supplement of the SafeZone Mini = 100 mm (3.94 in.)
Z
R
= Supplement for any reflection related measurement error of the SafeZone Mini
Z
F
= Supplement for any lack of ground clearance of the vehicle
SafeZone Mini
Protective field length
Ground clearance
2
F
120
60
50
0
50
100
150
Supplement 2
F
in mm
Gr
ound c
lear
anc
e
of the
ve
hi
cl
e i
n m
m
S
A