Allen-Bradley SafeZone Mini - Page 51

Rockwell Automation Publication 442L-UM005B-EN-P - April 2017 51
Mounting Chapter 4
Supplement Z
R
Supplement Z
R
is used for measurement errors that are caused by reflection.
With retroreflectors in the background at a distance of less than 1 m (3.28 ft)
from the boundary of the protective field, the supplement Z
R
is 200 mm (7.87
in.).
Supplement Z
F
Supplement Z
F
is due to lack of ground clearance. This supplement is necessary
because a person is detected above the foot and the braking action therefore
cannot consider the length of the foot in front of the detection point. If a
vehicle has no ground clearance, a person can receive foot injuries.
Figure 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 Figure 23
.
Figure 23 - Diagram 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
Ground clearance of the
vehicle in mm