Siemens Aktiengesellschaft

G&uuml;nter Schwesig

Guido Seeger

A device and method is described for safely recognizing a switch position angle of a rotary switch. Two redundantly configured computer units are provided to determine discrete switch positions of the rotary switch by evaluating two actual analog switch position signal values corresponding to the switch position angle, with each computer unit separately checking the actual analog switch position signal values for plausibility. Faulty switch position angles are identified by comparing the switch position angles determined by the first and the second computer unit.

Device and method for safely recognizing switch positions of a rotary switch

A device for locking at least two protective doors of an industrial machine, in particular an injection molding machine, is disclosed. The device includes a momentary contact switch, a sensor device for recognizing a closed state of the protective doors and a mechanical lock with an actuator that engages with an associated receiving device on one door. At least one non-energizable actuator is provided that engages with a receiving device associated with another protective door. In this way, several protective doors can be locked simultaneously, in particular a closing door and a discharge door of an injection molding machine.

Growing community of inventors

Erlangen, Germany

Günter Schwesig

Growing community of inventors

Erlangen, Germany

G&uuml;nter Schwesig

Günter Schwesig