A power supply module for intelligent electronic apparatuses and capable of transforming the energy of the LV network and of a battery into energy that can be used by said apparatuses is produced to serve as support for said apparatuses. In particular, for a use in a telecontrol equipment item, the casing of the power supply module is flat, can be installed on wall-mounted DIN rails, and includes, on its front face, a DIN rail for fixing the apparatuses that it powers, that is to say other functional modules of the equipment. The casing also includes an apron for the connections. Preferably, the power supply is produced by series connection, and the power supply module includes a port dedicated to external communication via a module of the equipment.