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Safety function blocks
426
02/16 MN05013001Z EN
Muting sensors parameter: 4S
Sequential muting with 4 sensors enables two groups of
muting sensors arranged in sequence to detect the start and
the end of the movement of the transported goods.
Muting is initiated after the second sensor A2 or B1 picks up.
Figure 215:
Light curtain for muting: Sequential muting with 4
muting sensors
The bridging of the safety function must be initiated and
then terminated in a specific order.
Both directions of motion are permissible with these signal
sequences:
• A1-A2-B1-B2
• B2-B1-A2-A1
Sensor group A is connected to the LM..A1 and LM..A2 func-
tion block coils. Sensor group B is connected to the LM..B1
and LM..B2 function block coils.
The sensors of group B must be arranged so that they remain
triggered as long as the sensors of group A at the entry are
still triggered. As soon as the sensor group A and the light
curtain no longer detect an interruption in the protected
area, the sensor group B reactivates the protective function
of the light curtain (with motion direction A to B) after the
muting area is vacated.
A
A1
A2
B
B1
B2
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