Operating Instructions Chapter 6
C4000 Palletizer Std./Adv.
C4000 Fusion
8012249/YT69/2016-02-25 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 65
Subject to change without notice
Mounting
6.3.1 Calculating the safety distance for access protection with the aid of the
blanking of geometrically even objects
The safety distance as per EN ISO 13855 and EN ISO 13857 depends on:
stopping/run-down time of the machine or system
(The stopping/run-down time is shown in the machine documentation or must be
determined by taking a measurement.)
response time of the protective device (see section “Response time” on page 99)
approach speed
other parameters that are stipulated by the standard depending on the application
It is imperative crawling beneath is prevented. For this reason mounting near the floor is
imperative.
As, in certain circumstances, it is only possible to assess whether the object is valid or,
for instance, is a person, when the object leaves the protective field, a safety supple-
ment must be added to the safety distance. As per EN ISO 13855 this must the length
of an arm (850 mm) + half the length of a step (350 mm).
How to calculate the safety distance according to EN ISO 13855:
Calculate the safety distance using the following formula:
S = k × T + 1200 mm
Where …
S = Safety distance [mm]
k = Approach speed [1600 mm/s]
T = Stopping/run-down time of the machine
+ Response time of the protective device after light path interruption [s]
1200 = Arm length (850 mm) + half step length (350 mm) according to EN ISO 13855
[mm]
the hazardous point
Notes
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