Original instructions, 3 height of the scan plane – Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner User Manual
Page 28
R
SafeZone™ Safety Laser Scanner User Manual
26 10000073050, July 2011
Original instructions
Supplement Z
R
for measurement error related to
reflection
With retroreflectors in the background at a distance of less than 1
m from the boundary of the protective safety field, the supplement
Z
R
is 200 mm.
Supplement 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 need additional protection at foot level.
Figure 32: Supplement due to lack of ground clearance
²
The supplement for foot space below 120 mm is 150 mm. If you
wish to further reduce this supplement, read the supplement
necessary from the following diagram:
Figure 33: Diagram of ground clearance of the vehicle
4.4.2 Protective safety field width
The width of the protective safety field must take into account the width
of the vehicle, the supplements for the measurement error and the lack of
ground clearance.
Calculation of the protective safety field width:
² Calculate the protective safety field width SB using the formula:
S
B
= F
B
+ 2 x (Z
G
+ Z
R
+ Z
F
)
Where...
Figure 34: Protective safety field width
Note: Normally, an installer will mount the SafeZone safety laser scanner
in the middle of the vehicle
. If this is not the case, then you must
define the protective safety field asymmetrically
. (The SCD represents
the fields as they appear in the monitoring on the scanner.) Ensure that
there are supplements on the right and left of the vehicle
.
4.4.3 Height of the scan plane
Figure 35: Mounting height
=
Response time of the safety laser scanner
V
max
=
Maximum velocity of the vehicle from the related vehicle documentation
Ground clearance
Safety field length
Z F
SafeZone
0
50
100
150
Supplement Z in mm
F
50
60
120
Ground clearance of
the vehicle
F
B
=
Vehicle width
Z
G
=
General safety supplement = 100 mm
Z
R
=
Supplement for any measurement error of the SafeZone multizone safety
laser scanner related to reflection
Z
F
=
Supplement for any lack of ground clearance of the vehicle
ATTENTION
Mount the SafeZone safety laser
scanner such that the scan plane is at a
maximum height of 200 mm.
Any item lying flat on the floor will be
reliably detected. Tilting the protective
safety field, which will result in objects
with a diameter of 200 mm not being
detected, is not allowed. We
recommend aligning the scan plane at
150 mm.
Max. 272 mm
Safety field
length set
150 mm