Chapter
4
Operating instructions
Flexi Classic
70
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8011509/YPP0/2015-10-26
Subject to change without notice
Special applications and
functions
4.7
Placement of muting sensors
Pay attention to the following notes on the placement of the muting sensors!
=
Always position the muting sensors such that only the material is detected and not the
means of transport (pallet or vehicle).
=
Always position the muting sensors such that material can pass unhindered, but people
are reliably detected.
=
Always position the muting sensors such that, on the detection of the material
0
, a
minimum distance to the light beams on the ESPE
1
is maintained.
The minimum distance provides the processing time necessary until muting is activated.
How to calculate the minimum distance:
S
″
v × 61 ms
Where …
S = minimum distance (mm)
v = velocity of the material (e.g. of the conveyor) (m/s)
=
Use optical sensors with background suppression. These detect material only up to a
specific distance. Objects that are further away than the material to be detected are not
detected.
WARNING
Fig. 24: Detection of material
during muting
Note
Fig. 25: Minimum distance,
material detection to the
ESPE on muting
Fig. 26: Principle of operation
of sensors with background
suppression
Material
Muting sensor
Means of transport
Transport level
v
S
1
0
Hazardous area
ESPE
Detection zone
Background
Sensor
Material is
detected
Material is not
detected
