Functions
Leuze electronic
MLD 300, MLD 500
21
4.7.2 Sequence controlled 2-sensor muting
Sequence controlled 2-sensor muting is particularly well suited for exiting danger zones, especially if there
is only limited space available outside of the danger zone. In this case, material transport is only permis
-
sible in one direction due to the arrangement of the muting sensors. Muting sensors MS1 and MS2 are
positioned within the danger zone and arranged so that they are activated in sequence. Once the muting
area is clear again, the muting state ends with a delay of 5 s. For sequence controlled 2-sensor muting,
there are no temporal expectations between MS1 and MS2. The only conditions that must be observed is
that, within eight hours of activation of MS1, MS2 must also be activated. In this way transported goods
can exit the protective field in a timely manner.
Sequence controlled 2-sensor muting can also be used if objects that are positioned close to one another
are to be moved through the protective field. The distance between the individual objects must, however,
be large enough that at least one muting sensor is free between two successive objects for at least 300 ms.
4.7.3 Timing controlled 4-sensor muting
(MLD 335, MLD 535)
Timing controlled 4-sensor muting is used when the muting sensor light beams should not cross, but
instead
must be parallel, due to special application situations, e.g. with reflective materials or under disruption.
1
Danger zone
MS1 Muting sensor 1
MS2 Muting sensor 2
t
8 h
Figure 4.3: Sequence controlled 2-sensor muting–arrangement of the muting sensors and timing
WARNING
Risk of death by through incorrect arrangement of the muting sensors!
Only select sequence controlled 2-sensor muting for material exits (see chapter 6.2.5).
1
Danger zone
MS1 Muting sensor 1
MS2 Muting sensor 2
t
<8 h
Figure 4.4: Muting for tight sequences of objects–arrangement of the muting sensors and timing
1
MS2 MS1
MS1
MS2
Muting
<5 s
t
t
MS1
MS2
Muting n
>300 ms
Muting
n+1
1
MS2
MS1
<5 s
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