Protective field length
T
he protective field must be long enough to stop the industrial truck under all condi‐
tions before the load or the industrial truck touches a person. If you determine the
required protective field length by driving tests, you must select the conditions that lead
to the longest stopping distance, e.g. the maximum achievable speed, the maximum
expected load, the maximum expected dimensions of the load and ground conditions
that could influence the stopping distance.
The information on mobile hazardous area protection also applies to narrow aisles. You
must also take into account other supplements.
Additional supplements for the protective field length in narrow aisles
•
If the distance between the center axis of the test object according to DIN
15185-2 and the front of the rack is more than 125 mm, an additional supple‐
ment Z
D
to the protective field length must be taken into account.
5)
For every
10 mm of additional distance between the test object and the front of the rack,
supplement Z
D
is 200 mm. At the maximum permissible distance between the
front of the rack and the test object, supplement Z
D
is 1500 mm.
•
If the safety laser scanner is not mounted at the very front of the industrial truck,
this offset must also be taken into account for the protective field length. L
SLS
=
maximum distance from the mounting position of the safety laser scanner to the
leading edge of the industrial truck or load.
6)
S
L
= S
A
+ TZ + Z
R
+ Z
F
+ Z
B
+ Z
D
+ L
SLS
Where:
•
S
L
= protective field length in millimeters (mm)
•
S
A
= stopping distance in millimeters (mm)
•
TZ = tolerance zone of the safety laser scanner, see "Data sheet", page 178
•
Z
R
= supplement for reflection-based measurement errors in millimeters (mm)
•
Z
F
= supplement for lack of ground clearance of the vehicle in millimeters (mm)
•
Z
B
= supplement for the decreasing braking force of the vehicle, from the vehicle
documentation, in millimeters (mm)
•
Z
D
= supplement for the additional distance between front of the rack and test
object in millimeters (mm)
•
L
SLS
= maximum distance from the mounting position of the safety laser scanner
to the leading edge of the industrial truck or load
5)
T
he outer edge of the provided loading equipment may be assumed instead of the front of the rack. The projection of the loading
equipment to the empty rack may be assumed to be a maximum of 50 mm.
6)
The maximum value of all industrial trucks under all occurring conditions always applies.
4 P
ROJECT PLANNING
56
O P E R A T I N G I N S T R U C T I O N S | microScan3 Pro I/O 8025424/1ELL/2022-01-21 | SICK
Subject to change without notice
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