Muting means the safe, automatic and temporary suspension (silencing or dimming) of electrosensitive protective equipment (light beam device, light grid, light curtain or laser scanner) during operation. As a result, for example, material can be transported in and out of a danger zone (continuous muting is also possible and is called blanking). The muting cycle consists of four phases and is recognisable via a muting lamp.

Special sensors are used to ensure the muting controller only starts the muting cycle when the material is being transported through the protected field. The sensors must be positioned in such a way that a person cannot activate the muting sensors. Should a person access the protected area, the sensors trigger an immediate shutdown of the potentially dangerous movement.

When arranging the muting sensors, a distinction is made between sequential and cross muting. With a sequential arrangement, multiple sensors are connected one after the other; they must be activated or deactivated consecutively in a certain sequence.

The arrangement of the two sensors with cross muting is, as the name suggests, crossed. They must both be activated simultaneously to initiate the muting cycle.

Typical application areas include the automotive industry, on palletising and drink dispensing machines, or in the manufacture of stone products (concrete blocks, tiles etc.).

Muting phase 1:

  • Material in front of the danger zone
  • Light beam device active
  • Muting lamp off

Muting phase 2:

  • Muting sensors 1 and 2 operated
  • Light beam device suspended
  • Muting lamp active

Muting phase 3:

  • Muting sensors 3 and 4 operated
  • Light beam device suspended
  • Muting lamp active

Muting phase 4:

  • Muting process ended
  • Light beam device reactivated
  • Muting lamp off

Pilz Automation Safety L.P.
7150 Commerce Boulevard
Canton, MI 48187

Telephone: +1 734 354-0272

Technical Support

Telephone: +1 877 745-9872

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