Patent ID: 8686588

Claim:
A device arrangement comprising: an electronic device having a rechargeable battery and a power adapter which can be electrically coupled to the electronic device and has a converter circuit for producing at least one operating voltage (U B ) for the electronic device from a supply voltage from a power supply system at a voltage output, wherein the operating voltage (U B ) is a DC voltage, the voltage output of the power adapter and the electronic device can be connected to one another via at least one power supply line to transmit the DC voltage, and the electronic device has a monitor that monitors at least one state of the electronic device and/or of the rechargeable battery, a first controller that produces at least one control signal (S) as a function of the monitored state, and a first signal device that signals the produced signal (S) to the power adapter, which first signal device is designed to modulate a radio-frequency AC voltage signal which is associated with the control signal (S), onto the power supply line, and the power adapter has a power supply system disconnector that electrically disconnects the converter circuit from the power supply system, a second signal device that identifies a signaled control signal (S) from the first signal device, which second signal device is capacitively coupled to the voltage output and designed to demodulate the modulated control signal (S) from the radio-frequency AC voltage signal, and a second controller that operates the power supply system disconnector as a function of the identified control signal (S).