SICK miniTwin4 User Manual

Further topics
•
"T
echnical data", page 89
•
"Deflector mirrors", page 104
•
"Weld spark guard", page 99
4.3.2 Minimum distance from the hazardous point
Overview
A minimum dis
tance must be maintained between the safety light curtain and the haz‐
ardous point. This distance is required to prevent a person or part of their body from
reaching the hazardous point before the end of the machine’s dangerous state.
Calculating the minimum distance according to ISO 13855
The calculation of the minimum distance is based on international or national stan‐
dards and statutory requirements applicable at the place of installation of the machine.
If the minimum distance is calculated according to ISO 13855, it depends on the fol‐
lowing points:
•
Machine stopping time (time interval between triggering the sensor function and
the end of the machine’s dangerous state)
•
Response time of the protective device
•
Reach or approach speed of the person
•
Resolution (detection capability) of the safety light curtain
•
Type of approach: orthogonal (at right angles) or parallel
•
Parameters specified based on the application
For the USA (scope of OSHA and ANSI), different regulations may apply, e.g.:
a) Laws: Code of Federal Regulations, Title 29 (CFR 29), Part 1910.217
b) Standards: ANSI B11.19
Complementary information
A
dditional information is available in the ISO 13855 standard and in the Guide for Safe
Machinery.
SICK offers a stopping/run-down time measurement service in many countries.
Further topics
•
"R
esponse time", page 91
4.3.2.1 Calculating minimum distance from the hazardous point
Important information
DANGER
Minimum distance from the hazardous point is too small
The dangerous state of the machine may not be stopped or not be stopped in a timely
manner due to a minimum distance that is too small.
b
Calculate the minimum distances for the machine in which the safety light curtain
is integrated.
b
When mounting the safety light curtain, observe the minimum distance.
PROJECT PLANNING 4
8012624/10OM/2018-08-09 | SICK O P E R A T I N G I N S T R U C T I O N S | miniTwin4
23
Subject to change without notice

SICK miniTwin4 Specifications

General

Brand	SICK
Model	miniTwin4
Category	Security Sensors
Language	English