Variable Description Value
Measurement
unit
C
h
Variable that takes into account the
sensor installation height (h) according
to standard ISO 13855:2010
1200 - 0.4 * H
Note: minimum value =850 mm. If the
result of the calculation is a value less
than the minimum, use 850 mm.
mm
C
α
Variable that takes into account the
sensor inclination (α) according to the
indications of Inxpect SpA
If H < 500 = (20 - α) * 16
If H ≥ 500 = (-α) * 16
Note: minimum value = 0 mm. If the result
of the calculation is a value less than the
minimum, use 0 mm.
mm
Example 1
l Machinery stopping time =0.5 s
l Sensor installation height (H) = 100 mm
l Sensor inclination (α) = 10°
T = 0.1 s + 0.5 s = 0.6 s
C
h
= 1200 - 0.4 * 100 = 1160 mm
C
α
= (20 - 10) * 16 = 160 mm
S =1600 * 0.6 + 1160 + 160 = 2280 mm
Example 2
l Machinery stopping time =0.2 s
l Sensor installation height (H) = 800 mm
l Sensor inclination (α) = -20°
T = 0.1 s + 0.2 s = 0.3 s
C
h
= 1200 - 0.4 * 800 = 880 mm
C
α
= (-(-20))* 16 = 320 mm
S =1600 * 0.3 + 880 + 320 = 1680 mm
5.3.3 Sensor height > 1 m
To calculate the depth of the dangerous area (S) for sensors with installation heights greater than 1 m, use the
following formula:
Where:
Variable Description Value
Measurement
unit
K Maximum dangerous area access speed 1600 mm/s
T Total system stopping time (LBK System
Series + machinery)
0.1 + Machinery stopping time
(calculated in accordance with ISO
13855:2010 standard)
s
C
h
Constant that takes into account the sensor
installation height (h) according to standard
ISO 13855:2010
850 mm
Example 1
l Machinery stopping time =0.5 s
T = 0.1 s + 0.5 s = 0.6 s
S =1600 * 0.6 + 850 = 1810 mm
5. Sensor position
LBK System Series| Instruction manual v1.2 SET 2021|SAF-UM-LBKBus-en-v1.2|© 2020-2021 Inxpect SpA
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