SICK S300

Operating instructions Chapter 5
S300
8010948/YY96/2016-02-17 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 65
Subject to change without notice
Mounting
5.4.1 Protective field length
You must configure the protective field such that a minimum distance to the vehicle is
maintained. This ensures that a vehicle monitored by the S300 comes to a stop before a
p
erson or object is reached.
If you are using an S300 Advanced, Professional or Expert, you can define several moni-
toring cases with different protective fields. You can switch these using static control
inputs or on the S300 Professional and Expert variants also dynamically.
For dynamic switching, the vehicle velocity is determined by means of incremental enco-
ders connected to the S300 Professional or Expert. S300 Professional and Expert can
therefore switch the protective fields as a function of the velocity. In such an application,
the protective field sizes (in particular the protective field length) must be calculated for all
velocities.
How to calculate the protective field length S
L
(see EN ISO 13855):
 Calculate the necessary protective field length S
L
using the formula:
S
L
= S
A
+ Z
G
+ Z
R
+ Z
F
+ Z
B
Where …
S
A
= Stopping distance
Z
G
= General safety supplement of the S300 = 100 mm
Z
R
= Supplement for any reflection related measurement error of the S300
Z
F
= Supplement for any lack of ground clearance of the vehicle
Z
B
= Supplement for the reduction in the braking performance of the vehicle to be found
in the related vehicle documentation
Stopping distance S
A
The stopping distance comprises the braking distance for the vehicle, the distance covered
during 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 velo-
city, but increases in a square function. This is particularly important if you switch between
protective fields with different sizes dependant on the velocity monitored by use of incre-
mental encoders.
Fig.
33
:
Stopping distance
Note
S
AnF
S
Br
S
A
S300
S
AnS