Abstract: A circuit interrupter includes a sensor structured to output a sensor signal, a control unit structured to receive an external control signal, the control unit including: a communication interface structured to receive the external control signal, and a waveform generator structured to generate a waveform equivalent to the sensor signal in response to the external control, and a signal processing circuit structured to receive and process the sensor signal or the generated waveform and to output the processed sensor signal or generated waveform to the control unit.

Abstract: A circuit interrupter includes a sensor structured to output a sensor signal, a control unit structured to receive an external control signal, the control unit including: a communication interface structured to receive the external control signal, and a waveform generator structured to generate a waveform equivalent to the sensor signal in response to the external control, and a signal processing circuit structured to receive and process the sensor signal or the generated waveform and to output the processed sensor signal or generated waveform to the control unit.

Abstract: A switching device, wherein the switching device has a switch cabinet, which has a switch cabinet housing, a switching apparatus that is attached in the switch cabinet, and an external module. The external module is attached to the switch cabinet housing and connected to the switching apparatus. The external module also comprises a display element and/or an operating element. The display element is visible from outside of the switch cabinet housing, and the operating element can be operated from outside of the switch cabinet housing.

Abstract: A method for data transfer in a digital data transfer system with at least two participating devices includes connecting the at least two participating devices through a data connection. A protocol stack is processed by a processor of the at least two participating devices. Data exchange between the at least two participating devices via the data connection is organized by means of a communication call routine in a session layer of the protocol stack. The data is assigned to a series of messages by a write-read routine in a transport layer of the protocol stack and configured to at least one of fill and read out a memory buffer. At least two predefined priority levels are defined in the messages for transporting the data with different priority levels.