Omron F3SJ Series Original Instructions Manual page 8

Muting lamps (external indicators) that indicate the state of the muting and override functions
must be installed where they are clearly visible to workers from all the operating positions.
Muting related time must be properly configured for its application by a sufficiently trained and
qualified person, and the person must have responsibility for settings, especially when setting the
muting time limit to infinite.
Use independent 2 input devices for muting inputs.
You must install F3SJ, muting sensor, and physical barrier, and configure time settings for muting
so that an operator should not enter hazardous zone.
Install the switch that activates the override and that uses hold-to-run device, such as spring-
return key 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. Make sure that nobody is in the
hazardous zone before activating the override function.
Install the sensor system so that it is not affected by the reflective surface of the F3SJ.
When using more than 1 set of F3SJ, install them so that mutual interference does not occur,
such as by configuring series connections or using physical barriers between adjacent sets.
Make sure that the F3SJ is securely mounted and its cables and connectors are properly
secured.
Make sure that foreign material such as water, oil, or dust does not enter the F3SJ or the
connector while the cap is removed.
Do not use the sensor system with mirrors in a retro-reflective configuration as shown
below.Doing so may hinder detection. It is possible to use mirrors to "bend" the detection zone to
a 90-degree angle.
Reflector
Reflector
Position with retro-reflection
Position with detection zone bent at 90
F3SJ-A
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User's Manual