A screening device includes a rail, a drive shaft, a motorized drive device, including an electromechanical actuator, and an autonomous electrical power supply device, including a battery module. The battery module includes first and second mounting brackets, each arranged inside the rail and configured to hold the battery module inside the rail. The actuator includes third and fourth mounting brackets, each arranged inside the rail and configured to hold the actuator inside the rail. The brackets are identical. Furthermore, each of the brackets includes an opening, configured to accommodate the drive shaft.