Multilevel detection device for safety apparatuses for the control of industrial machines or plants

A safety apparatus for controlling machines or industrial plants, comprising:

• a receiving device adapted to be placed at a fixed part of a machine or plant or a protective barrier of the machine or plant;
• a plurality of movable actuators adapted to be applied to movable parts of the machine or industrial plant and each adapted to selectively interact with said receiving device to send to it a respective presence signal provided with its own identification code;
• and
• a detection device associated with said receiving device and having a reading head adapted to receive said presence signal provided with said identification code following the positioning of one of said movable actuators at a predetermined minimum distance from said reading head and a processing circuit integrated in said reading head and adapted to generate a plurality of output signals corresponding to respective command or signaling functions for one or more parts of the machine or plant;
• wherein said processing circuit is configured to associate to each of said identification signals a personalized combination of said output signals stored there inside for the execution of respective combinations of said command or signaling functions for one or more of said movable actuators.