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Chapter3 Installation Conditions
F3SJ-E/B
User’s Manual
Wiring/Installation
Installation Conditions
Detection Zone and Approach
Install a protective structure so that the hazardous part of a machine can only be reached
by passing through the sensor's detection zone. Install the sensors so that part of the
person is always present in the detection zone and no blind spot is generated when
working in a machine's hazardous zones.
If a person is able to step into the hazardous zone of a machine and remain behind the
F3SJ-E/B's detection zone, configure the system with an interlock function that prevents
the machine from being restarted. Failure to do so may result in serious injury.
Do not use this sensor for machines that cannot be stopped by electrical control. For
example, do not use it for a pressing machine that uses a full-rotation clutch. Otherwise, the
machine may not stop before a person reaches the hazardous part, resulting in serious injury.
To use the F3SJ-E/B in PSDI mode (Reinitiation of cyclic operation by the protective equipment),
you must configure an appropriate circuit between the F3SJ-E/B and the machine. For details
about PSDI, refer to OSHA 1910.217, IEC 61496-1, and other relevant standards and regulations.
Install the interlock reset switch in a location that provides a clear view of the entire
hazardous zone and where it cannot be activated from within the hazardous zone.
Do not use the F3SJ-E/B in environments where flammable or explosive gases are
present. Doing so may cause an explosion.
The F3SJ-E/B cannot protect a person from a projectile exiting the hazardous zone.
Install protective cover(s) or fence(s).
Make sure that the F3SJ-E/B is securely mounted and its cables and connectors are
properly secured.
Correct installation
Incorrect installation
The hazardous zone of a machine can be reached
only by passing through the sensor's detection zone.
While working, a person is inside the sensor's
detection zone.
It is possible to reach the hazardous zone of a machine
without passing through the sensor's detection zone.
A person is between the sensor's detection zone
and the hazardous zone of a machine.
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