Inxpect SRE 200 Series - 7.4 Dangerous area calculation

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Inxpect SRE 200 Series| Instruction manual v1.5 DEC 2023 |Inxpect SAF-IM-200S_5m_7_00047_en_v1.5|© 2021-2023 Inxpect SpA
7. Sensor position
Conditions:
l
The sensor axis must always be included in all the detection fields.
l
The angular coverage of each detection field must be wider than, or equal to, the angular coverage of the
following detection fields.
l
The minimum corridor width is 20 cm (7.87 in).
7.4 Dangerous area calculation
7.4.1 Introduction
The dangerous area of the machinery to which Inxpect SRE 200 Series is applied must be calculated according to
the formulas described in this section, which are defined considering the guidelines and requirements of the ISO
13855:2010 (and ISO DIS 13855) standard.
7.4.2 Formula for stationary application
To calculate the depth of the dangerous area (S) for stationary applications, use the following formula:
Where:
Variable Description Value
Measurement
unit
K Maximum dangerous area access
speed
1600 mm/s
T Total system stopping time
(Inxpect SRE 200 Series +
machinery)
0.1 + Machinery stopping time (calculated in
accordance with standard ISO 13855:2010)
s
C Corrective value If H ≤ 1000, C = 1200 mm
If 1000 < H < 1400, C = 1200 - [(H - 1000) *
0.875]
mm
If H ≥ 1400, C =850
For more details about H, see "H dimension
definition" below.
mm
Note: when using Fieldbus, add the communication and processing time required for the signal to reach the
machine after the safety output is activated.
Example 1
l
Machinery stopping time =0.5 s
l
H ≥ 1400
T = 0.1 s + 0.5 s = 0.6 s
S =1600 * 0.6 + 850 = 1810 mm
Example 2
l
Machinery stopping time =0.3 s
l
H = 1200
T = 0.1 s + 0.3 s = 0.4 s
C = 1200 - [(1200-1000)* 0.875] =1025 mm
S =1600 * 0.4 + 1025 = 1665 mm
7.4.3 H dimension definition
According to the approach, the H dimension has to be considered in the following way:
l
for the parallel approach, H is the upper edge of the detection field [A]
l
for the orthogonal approach, H is the highest point of intersection between the detection field and the body
of a standing person, defined in the worst-case penetration position [B], [C], [D]