An occultation device comprising at least: - a screen, - a motorised driving device, and - a configuration or maintenance terminal, the motorised driving device comprising at least: - an electromechanical actuator, the electromechanical actuator being configured to move the screen, and - a power supply cable, the electromechanical actuator being configured to be supplied with electrical energy from a main power supply source, via the power supply cable, the electromechanical actuator comprising at least: - an electronic control unit, - an electric motor, - an output shaft, and - an electrical connection device, the electrical connection device being electrically connected to the electronic control unit, the configuration or maintenance terminal comprising at least: - an electronic unit, - an electrical connection cable, and - an electrical socket, the electrical socket being, on the one hand, configured to be electrically connected with the electrical connection device of the electromechanical actuator and, on the other hand, configured to be electrically connected with the electronic unit of the configuration or maintenance terminal, via the electrical connection cable, characterised in that, when the configuration or maintenance terminal is electrically connected to the electromechanical actuator, at least by means of the electrical connection cable and the electrical socket of the configuration or maintenance terminal and the electrical connection device of the electromechanical actuator, the configuration or maintenance terminal supplies electrical energy to the electronic control unit of the electromechanical actuator, the configuration or maintenance terminal then forming a secondary power supply source, and in that a value of a voltage of the electrical power supply supplied by the configuration or maintenance terminal to the electronic control unit of the electromechanical actuator is strictly less than a value of a voltage of the electrical power supply supplied by the main power supply source to the electromechanical actuator, via the power supply cable. - a screen, - a motorised driving device, and - a configuration or maintenance terminal, the motorised driving device comprising at least: - an electromechanical actuator, the electromechanical actuator being configured to move the screen, and - a power supply cable, the electromechanical actuator being configured to be supplied with electrical energy from a main power supply source, via the power supply cable, - an electromechanical actuator, the electromechanical actuator being configured to move the screen, and - a power supply cable, the electromechanical actuator being configured to be supplied with electrical energy from a main power supply source, via the power supply cable, the electromechanical actuator comprising at least: - an electronic control unit, - an electric motor, - an output shaft, and - an electrical connection device, the electrical connection device being electrically connected to the electronic control unit, - an electronic control unit, - an electric motor, - an output shaft, and - an electrical connection device, the electrical connection device being electrically connected to the electronic control unit, the configuration or maintenance terminal comprising at least: - an electronic unit, - an electrical connection cable, and - an electrical socket, the electrical socket being, on the one hand, configured to be electrically connected with the electrical connection device of the electromechanical actuator and, on the other hand, configured to be electrically connected with the electronic unit of the configuration or maintenance terminal, via the electrical connection cable, - an electronic unit, - an electrical connection cable, and - an electrical socket, the electrical socket being, on the one hand, configured to be electrically connected with the electrical connection device of the electromechanical actuator and, on the other hand, configured to be electrically connected with the electronic unit of the configuration or maintenance terminal, via the electrical connection cable, characterised in that, when the configuration or maintenance terminal is electrically connected to the electromechanical actuator, at least by means of the electrical connection cable and the electrical socket of the configuration or maintenance terminal and the electrical connection device of the electromechanical actuator, the configuration or maintenance terminal supplies electrical energy to the electronic control unit of the electromechanical actuator, the configuration or maintenance terminal then forming a secondary power supply source, and in that a value of a voltage of the electrical power supply supplied by the configuration or maintenance terminal to the electronic control unit of the electromechanical actuator is strictly less than a value of a voltage of the electrical power supply supplied by the main power supply source to the electromechanical actuator, via the power supply cable.