Abstract: Charging device for charging and/or discharging an electrical energy store, which is preferably a traction battery for an electric or hybrid vehicle, wherein the charging device has: a main current path, which can be connected to a grid connection and the energy store, wherein the grid connection supplies an AC voltage; at least one relay, which is arranged in the main current path, has a make contact and is set up to interrupt the main current path in an open contact position and to close the main current path in a closed contact position; and a test apparatus which is electrically connected to the make contact of the relay and is set up to check the contact position of the relay; wherein the test apparatus comprises a zero crossing detection circuit, which is set up to detect the zero crossing of a phase at the make contact of the relay.

Abstract: A system circuit board configured to be supplied by at least one power supply unit, with an operating voltage in an operating state and a stand-by voltage in at least one stand-by state, the system circuit board includes at least one connection device for at least one extension card, wherein the connection device is configured to provide at least one first card voltage on the basis of the operating voltage; at least one switching element arranged on the system circuit board and configured to disconnect the at least one connection device from the operating voltage; and a control device arranged on the system circuit board, and configured to identify a type of a connected power supply unit and send a switching signal to the switching element depending on the identified type.

Abstract: An interface arrangement includes a first interface via which a first power supply can be provided, at least one second interface via which at least one second power supply can be provided, and a control device. The first interface is connected to the control device via a connector of a first or a second type. The control device is configured to detect whether the first interface is connected to the control device via the connector of the first type or of the second type. The control device is further configured to limit the at least one second power supply provided at the at least one second interface depending on the detected type of the con-nector.

Abstract: An interface arrangement (1) includes a plug connector (4) arranged on an interface board (3). Furthermore, the interface arrangement (1) includes an electrically conductive cover (10) at least partially surrounding the plug connector (4). The electrically conductive cover (10) is adapted to seal an interface opening of the housing, in which opening the plug connector (4) can be arranged, against electromagnetic radiation. The electrically conductive cover (10) includes at least one tab (19) with a latching device. The interface board (3) includes at least one receiving device, which is adapted to receive the at least one tab (19) and to latch with the latching device. A computer system with such an interface arrangement (1), and a method for assembling such an interface arrangement (1).

Abstract: A printed circuit board includes at least one multipole pin header with at least one first pin contact and a second pin contact arranged adjacent to the first pin contact and connected to a first predetermined reference potential, at least one evaluation circuit electrically connected to the first pin contact and arranged for this purpose, detecting the application of a predetermined voltage level at the first pin contact, and a safety circuit electrically connected to the at least one evaluation circuit, which is arranged to prevent a complete voltage supply to the printed circuit board when the evaluation circuit detects the application of the predetermined voltage level at the first pin contact.

Abstract: An interface arrangement (1) includes a plug connector (4) arranged on an interface board (3). Furthermore, the interface arrangement (1) includes an electrically conductive cover (10) at least partially surrounding the plug connector (4). The electrically conductive cover (10) is adapted to seal an interface opening of the housing, in which opening the plug connector (4) can be arranged, against electromagnetic radiation. The electrically conductive cover (10) includes at least one tab (19) with a latching device. The interface board (3) includes at least one receiving device, which is adapted to receive the at least one tab (19) and to latch with the latching device. A computer system with such an interface arrangement (1), and a method for assembling such an interface arrangement (1).

Abstract: A system circuit board configured to be supplied by at least one power supply unit, with an operating voltage in an operating state and a stand-by voltage in at least one stand-by state, the system circuit board includes at least one connection device for at least one extension card, wherein the connection device is configured to provide at least one first card voltage on the basis of the operating voltage; at least one switching element arranged on the system circuit board and configured to disconnect the at least one connection device from the operating voltage; and a control device arranged on the system circuit board, and configured to identify a type of a connected power supply unit and send a switching signal to the switching element depending on the identified type.

Abstract: A computer system having at least one interface includes at least one voltage monitoring device, and at least one interface control device including a signaling circuit, wherein the interface control device is configured to restrict a power output via the interface to a predetermined power level if the voltage monitoring device detects a drop of a supply voltage of the computer system below a first threshold value, and the signaling circuit is configured to signalize the restriction of the power output to a peripheral device.

Abstract: A computer system that includes a power supply unit that generates at least one secondary supply voltage (Vcc) and an auxiliary voltage (Vaux) based on an AC supply voltage (VAC), and a system board electrically connected to the power supply unit, the system board comprising a sequencing microcontroller that selectively activates further components of the system board, the further components comprising a chipset, wherein the sequencing microcontroller is configured to monitor the state of at least one control signal of the power supply unit and/or the system board to detect a failure of the AC supply voltage (VAC) and signal the failure of the AC supply voltage (VAC) to at least the chipset.

Abstract: A computer system includes a system component, at least one non-volatile mass memory, and at least one power supply unit that supplies power. The computer system has at least one system software component having an interface that selects energy-saving functions, which interface provides at least one function that operates the computer system in an absence mode in which at least one first application running on the computer system can be addressed via a network connection. At least one software component is executed by an operating system during operation of the computer system, which software component stops at least one second application when absence of a user is detected and calls the function that operates the computer system in the absence mode via the interface.

Abstract: A motherboard for a computer system that electrically connected to an acoustic transmitter that outputs acoustic signals includes a first sound generator circuit configured to generate a first control signal for the acoustic transmitter; a second sound generator circuit configured to generate a second control signal for the acoustic transmitter; and a logic circuit electrically coupled to the first sound generator circuit via a first signal line and to the second sound generator circuit via a second signal line and configured to transfer the first control signal or the second control signal to the acoustic transmitter.

Abstract: A computer system that includes a power supply unit that generates at least one secondary supply voltage (Vcc) and an auxiliary voltage (Vaux) based on an AC supply voltage (VAC), and a system board electrically connected to the power supply unit, the system board comprising a sequencing microcontroller that selectively activates further components of the system board, the further components comprising a chipset, wherein the sequencing microcontroller is configured to monitor the state of at least one control signal of the power supply unit and/or the system board to detect a failure of the AC supply voltage (VAC) and signal the failure of the AC supply voltage (VAC) to at least the chipset.