SICK S3000

Chapter 5 Operating instructions
S3000
78 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8009942/WK81/2012-11-28
Subject to change without notice
Mounting
Stopping distance
The stopping distance comprises the braking distance for the vehicle, the distance covered
d
uring the response time of the safety laser scanner and the response time of the vehicle
controller.
Take into account that the braking distance for a vehicle is not linear with increasing
velocity, but increases in a square function. This is particularly important if you switch the
protective field length as a function of the velocity using incremental encoders.
How to calculate the stopping distance:
 Calculate the stopping distance using the formula:
S
A
=S
Br
+ S
AnF
+ S
AnS
Where …
S
Br
= Braking distance from the vehicle documentation
S
AnF
= Distance covered during the response time of the vehicle controller from the
vehicle documentation
S
AnS
= Distance covered during the response time of the safety laser scanner
Fig.
36
:
Stopping distance
Note
Fig.
37
:
Braking distance as a
function of the vehicle
velocity
Necessary
protective field
length
Braking distance of the vehicle
Safety supplement
Speed
Stopping distance
S
AnF
S
Br
S
A
S3000
S
AnS