SICK nanoScan3

4.3.8.2 Calculation example for the minimum distance
Calculation example of the minimum distance S according to ISO 13855
T
he example shows the calculation of the minimum distance for an orthogonal
approach to the protective field. A different calculation may be required depending
on the application and the ambient conditions, e.g. for a protective field parallel to or at
any angle to the direction of approach or an indirect approach.
►
First, calculate S using the following formula:
S=2,000mm/s×T+8×(d–14mm)
where:
°
S =minimum dis
tance in millimeters (mm)
°
T = stopping/run-down time for the entire system in seconds (s)
(Response time of the safety laser scanner + machine’s stopping/run-down
time, incl. response time of the machine’s control system and signal propaga‐
tion time)
°
d =r
esolution of the safety laser scanner in millimeters (mm)
✓
If the result is S ≤100mm, use S = 100mm.
✓
If the result is 100mm < S ≤500mm, use the calculated value as the minimum
distance.
►
If the result is S >500mm, then recalculate S with the following formula:
S=1,600mm/s×T+8×(d–14mm)
✓
If the new value is S >500mm, then use the newly calculated value as the
minimum distance.
✓
If the new value is S ≤500mm, then use S = 500mm as the minimum distance.
The reach/approach speed is already included in the formula.
4.3.9 Access protection
Overview
T
he safety laser scanner is mounted with a vertical scan plane in a stationary applica‐
tion, for example on a machine, for which access to the hazardous area may be defined
structurally.
For access protection, the safety laser scanner detects an intrusion by a whole body.
The protective field is orthogonal to the direction of approach.
You must monitor a reference contour to protect the safety laser scanner from acciden‐
tal misalignment or manipulation.
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ROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | nanoScan3 – EtherNet/IP™ 8027909/2023-02-22 | SICK
Subject to change without notice