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6.5 X-Activation Mode
The X-muting activation mode allows bi-directional transport of material. This muting mode is used in
applications, where eg. pallets are used to carry stacked boxes or crates. Most stable detection of this kind
of material is possible using the X-muting activation mode. Two muting sensors are connected to the two
muting inputs, Muting A must be a sensor with high output (NO) and Muting B must be a sensor with low
output (NC) when the sensor is interrupted (i.e. an object is detected).
Timing requirements and limitations:
• Either Muting A or Muting B can be used to initiate the muting function.
• The second muting sensor must be activated within 4 s of the first sensor to activate the muting
function.
• Muting A and Muting B can be activated at the same time.
• Muting time is infinite.
• The Focus II allows that Muting A or Muting B drop for a maximum time of 200 ms without stopping the
muting function. A time longer than 200 ms is detected as a muting stop.
NB!
– Muting sensors must be NO on A and NC on B to get this function.
– The crossing point of the two muting sensors should be inside the hazardous zone. Failure to do so
may result in serious injury.
– Light grids (FII-4-K...) can be set up for use with two NO muting sensors by using the change-over
switches on the receiver (see 4.4). This setting also introduce an additional timing requirement; muting
A and muting B cannot be activated at the same time. A minimum time difference of approximately 30
ms is mandatory.
Protected Area
Standard X-muting:
Muting A is NO and muting B is NC
Muting A and muting B can be activated at the
same time, and must be activated within 4 s of
each other.
2TLC172015M0201, rev. D
A
Protected Area
Alternative X-muting (see 4.4):
Both muting A and B are NO (for light grids only)
The second muting sensor cannot be activated
until at least 30 ms after the first sensor is
activated. The distance d must therefore be
considered (in regards to the speed of the
conveyor, in the above example). Second sensor
must be activated within 4 s after the other.
32
A
d
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