Operating instructions
Chapter
4
Flexi Classic
8011509/YPP0/2015-10-26
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
71
Subject to change without notice
Special applications and
functions
4.7.1
Muting with two sensors (a sensor pair), crossed placement
In the example, the material moves from left to right or, alternatively, from right to left. As
soon as the muting sensors A1 and A2 are activated, the protection provided by the pro-
tective device (ESPE) is muted.
The following requirements must be met:
Condition
Description
A1 & A2
Muting applies as long as this condition is met.
How to calculate the distance:
S
1
″
v × 61 ms
Where …
S
1
= minimum distance between the light beams of the ESPE and the detection by the
muting sensors (mm)
v
= velocity of the material (e.g. of the conveyor) (m/s)
•
The material can flow in both directions.
•
In order for materials to be conveyed in both directions, place the intersection of the
muting sensors
0
exactly on the course of the light beams of the ESPE. In order for
material to be conveyed in one direction only, place the intersection behind the light
beams of the ESPE seen from the conveyor direction.
•
This placement is suitable for through-beam photoelectric switches and photoelectric
reflex switches.
Fig. 27: Muting with two
sensors, crossed placement
Tab. 31: Conditions for
muting with two sensors,
crossed placement
Notes
ESPE
A1
A2
S
3
S
2
S
1
0
Hazardous area
