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System Configuration and Functions
Installation Standard for Muting Sensors
•Set the muting sensors so that they can detect all of the passing detection objects (palettes,
automobiles, etc.). Do not install in a position so that only the front or rear end of the detection object
is detected.
•Set the muting sensors so that they detect the objects even when they are loaded on palettes or other
transport devices.
•Also, install the F3SJ and muting sensors so that each object passes through all muting sensors
before the next object arrives at the first muting sensor. Also, install all F3SJ and muting sensors so
that no person is able to accidentally enter the hazardous zone while the muting function is enabled.
•If objects' speeds can vary, muting time limit must be taken into consideration.
Installation Example 1 of Standard Muting Mode (using 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
L: Length of workpiece
d1: Maximum distance required for the muting sensor to keep the muting function enabled
D1: Minimum distance required for the muting sensor to keep the muting function enabled
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 zone. This configuration prevents the muting function from being
enabled by a person passing through the crossover point.
F3SJ-A
42
User's Manual
B1
V
Workpiece
A1
L
Hazardous zone
Reflector
F3SJ
The crossover point of muting sensors
A1 and B1 must be located within the
hazardous zone
Reflector
F3SJ
d1=D1
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