Muting is the safe, temporary, automatic suspension of electrosensitive protective equipment (ESPE), so that material can be transported into and out of a danger zone. 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 persons cannot activate the muting sensors. If anyone should access the protected area, the potentially dangerous movement is shut down immediately.
The industry has developed special safety relays with muting function specifically for this case. Some light curtains also provide the option to mute the protected field only partially (blanking). In this process for example, the precise section through which the item is being transported is rendered passive. However, under no circumstances should anyone be able to reach the danger zone undetected via this deactivated section of the protected field. A design measure (e.g. a cover for the remaining free space) should be used to ensure that nobody can reach the danger zone from the side, in between the item and the protective device.
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