Reer ARGOLUX AU S3M2, Инструкция по установке, эксплуатации и обслуживанию

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Figure 2
Positioning of the muting sensors.
F
The position at which the two muting beams intercept each The position at which the two muting beams intercept each
other must be beyond the barrier in the danger area. other must be beyond the barrier in the danger area.
To de-activate the muting function and therefore restore guard status, the
AU S3M2 control unit must detect not only switching of at least one sensor
but also previous occupation and freeing of the light barrier.
If one of the sensors (1 or 2) is free but the control unit does not detect
correct switching of the output of the light barrier, it de-energizes relays A
and B and indicates an error in the muting sequence.
A third sensor (sensor 3) can be used to add a further functional check to
the system. In this case, after de-activation of the muting function,
sensor 3 must be freed before re-enabling the muting function (fig. 3).
Therefore, sensor 3 makes it possible to check the distance between two
consecutive pallets. For correct application, refer to the muting sensor
positioning section (page 18).
Figure 3
Sensor 3 and pallet separation.