System, especially for use in aircraft, for controlling at least one switching device (5, 5b, 5n) able to open or close the connection between at least one power source and at least one supplied device, and means for measuring the state of the power supply channel. The system comprises: at least two microcontrollers (1a, 1b) each able to emit a command intended for each switching device (5, 5b, 5n), said microcontrollers (1a, 1b) being connected to at least one portion of the means for measuring the state of the power supply channel; and a means (14, 14b, 14n) for determining the command to be transmitted, able to determine the command to be transmitted to each switching device (5, 5b, 5n) from the commands emitted by each microcontroller (1a, 1b) and intended for said control switch.