37
F3SJ-A
User’s Manual
Chapter
2
Mu
ting Sys
te
m
System Configuration and Functions
E
Installation Example of 2 Muting Sensors
This is an example of 2 retro-reflective type photoelectric sensors used as muting sensors installed in a
cross pattern.
Use 2 sensors when the length L of the workpieces are not constant or are insufficient.
1.
Before a workpiece passes through
The output state of muting sensors A1 and B1 are both OFF (contacts A1 and B1 are open due to
muting output), and the safety function of the F3SJ is working.
In this example where 2 muting sensors are used, the crossover point of muting sensors A1 and B1
must be located in the hazardous area. This configuration prevents the muting function from being
enabled by a person passing through the crossover point.
2.
The muting sensor outputs are turned ON (muting inputs are HIGH) and the safety function of the F3SJ
is disabled.
When muting sensors A1 and B1 are turned ON in this order, the muting function is enabled. In this
state, the safety function of the F3SJ is disabled.
L
F3SJ
F3SJ
d1=D1
B1
A1
V
Workpiece
Hazardous area
Reflector
Reflector
The crossover point of muting sensors
A1 and B1 must be located within the
hazardous area
F3SJ
F3SJ
B1
A1
Workpiece
Hazardous area
Reflector
Reflector
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