Abstract: A display device includes a plurality of cells arranged in a two-dimensional matrix and including luminous elements and feedback elements arranged in the cells. A control device emits control signals to control the luminous elements individually in accordance with a setpoint control pattern. An evaluation device receives from the feedback elements feedback signals depending on actual control states of the luminous elements and determines a feedback pattern based on the feedback signals. The evaluation device then compares the feedback pattern with the setpoint control pattern and producing a normal reaction when the feedback pattern matches the setpoint control pattern, and producing a fault reaction that is different from the normal reaction when the feedback pattern fails to match the setpoint control pattern.

Abstract: A circuit arrangement, especially for supplying an electromagnetic holding brake with a clocked supply voltage, includes a module for controlled provision of a clocked supply voltage for free-wheeling operation of the holding brake. The module has a switching unit for switching off the supply voltage for braking operation. A free-wheeling diode and a suppressor diode are connected in parallel to an inductance of the holding brake, with the free-wheeling diode being effective in free-wheeling operation only and the suppressor diode being effective in braking operation only.

Abstract: A display device includes a plurality of cells arranged in a two-dimensional matrix and including luminous elements and feedback elements arranged in the cells. A control device emits control signals to control the luminous elements individually in accordance with a setpoint control pattern. An evaluation device receives from the feedback elements feedback signals depending on actual control states of the luminous elements and determines a feedback pattern based on the feedback signals. The evaluation device then compares the feedback pattern with the setpoint control pattern and producing a normal reaction when the feedback pattern matches the setpoint control pattern, and producing a fault reaction that is different from the normal reaction when the feedback pattern fails to match the setpoint control pattern.

Abstract: A circuit arrangement, especially for supplying an electromagnetic holding brake with a clocked supply voltage, includes a module for controlled provision of a clocked supply voltage for free-wheeling operation of the holding brake. The module has a switching unit for switching off the supply voltage for braking operation. A free-wheeling diode and a suppressor diode are connected in parallel to an inductance of the holding brake, with the free-wheeling diode being effective in free-wheeling operation only and the suppressor diode being effective in braking operation only.

Abstract: Information describing an automation system is input into a control device of an automation device. The information the information includes a description of elements of the automation device, a description of interaction between the elements, and safety-related reliability information associated with the elements. The control device independently determines from the provided information reliability information for the automation device as a whole.