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LBK System Series| Instruction manual v1.2 SET 2021 |SAF-UM-LBKBus-en-v1.2|© 2020-2021 Inxpect SpA
4. Functioning principles
4.9 Muting
4.9.1 Description
Muting temporarily suspends the safety functions. Motion detection is disabled and therefore the control unit
maintains the safety outputs activated even when the sensors detect motion in detection field 1 or detection field
2 (if present).
4.9.2 Muting enabling
The muting function can be enabled through digital input (see "Enable muting signal characteristics" below) or
safety Fieldbus (if available).
Through digital input the muting function can be enabled for all the sensors simultaneously or only for a group of
sensors. Up to two groups can be configured, each associated to a digital input.
Through the Inxpect Safety application, the following must be defined:
l for each input, the group of managed sensors
l for each group, the sensors that belong to it
l for each sensor, whether it belongs to a group or not
Note: if the muting function is enabled for one sensor, it is enabled for all the detection fields of the sensor,
regardless the detection fields are dependent or independent and the anti-tampering functions are disabled for
that sensor.
See "Configure the inputs and outputs" on page64.
Through the safety Fieldbus (if available) the muting function can be enabled for each sensor singularly.
WARNING! If the muting function has been enabled both through the safety Fieldbus and the digital
inputs, the digital inputs prevail over the Fieldbus.
Note: the muting function remains deactivated until the system detects motion in the area.
4.9.3 Muting activation
The muting function is activated only if all the detection fields are free from motion and the restart timeout has
expired for all the detection fields.
4.9.4 Enable muting signal characteristics
The muting function is enabled only if both logic signals of the dedicated input meet certain characteristics.
Below is a graphic representation of the signal characteristics.
In the Inxpect Safety application, in Settings > Digital Input-Output it is necessary to set the parameters that
define the signal characteristics.
Note: with pulse duration = 0, it is sufficient that the input signals are at high logic level (1) to enable muting.
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