Control device

A control device (1) for fail-safe control of an electric actuator (15), the control device comprising:

• a source (2) of electrical power;
• at least one power path from the source (2) of electrical power to an output connection (3) for an actuator (15), at least one power part (4) arranged in said power path, said power part (4) is designed to at least one of switch a polarity of a voltage present at the output connection (3) or to change the amount of an electrical power provided at the output connection (3);
• at least one power switching element (5) arranged in the power path, the at least one power switching element (5) is designed to switch the electrical power provided at the output connection (3) on and off;
• at least one sensor (7) arranged downstream of the power switching element (5) in order to determine the electrical power currently provided at the output connection (3);
• a first signal input (N) for an enable signal (Safety ok2) for actuating the power switching element (5);
• a second signal input (O) for a switching signal (Release) for providing the electrical power at the output connection (3) based on a switching state of the enable signal (Safety ok2);
• at least one software-free electrical logic assembly (6a) comprising a combinational circuit, which is designed to carry out logic operations between the switching state of the switching signal (Release) and the electrical power determined by the sensor (7) and consequently to generate at least one further enable signal (FGS2), which further enable signal (FGS2) is able to be used to act on the at least one power switching element (5).