Leuze electronic
MSI 420.TMC-03
7
Phase 2 - Activating muting
As soon as the first muting sensor is interrupted, i.e. the Start 1 signal is LOW, the protective sensor is
bridged - muting is active.
Phase 3 - Interruption of the protective sensor
While the transport material occupies the first muting sensor, the protective sensor is additionally inter
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rupted. As the system is in the muting state, the safety outputs are not deactivated.
Phase 4 - Interruption of Start 2
At the earliest 5 ms after Start 1 has been interrupted, Start 2 is also allowed to be interrupted by the trans
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port material. During this phase, the two muting sensors (i.e. both start signals) as well as the protective
sensor must be occupied (LOW level).
A maximum time between occupancy of Start 1 and Start 2 is not monitored by the device.
Figure 3.2: Phase 2 - Muting is activated by the interruption of Start 1.
Figure 3.3: Phase 3 - Protective sensor is interrupted.
Figure 3.4: Phase 4 - Continuation of the muting process with occupancy of Start 2 by the pallet.
Danger zone
Protective sensor
Start 1
Start 2
Danger zone
Protective sensor
Start 1
Start 2
Danger zone
Protective sensor
Start 1
Start 2
