Electrical circuit for transmitting the status information, particularly for railway material, and system incorporating such a circuit

Electric transmission circuit state of a parameter or a computer, intended to be connected to the terminals of an accumulator (3) power and consisting of: - a link galvanic isolation (7) between said electric circuit and an output S for issuing a status information, and - a switch (5) whose position opening or closing is representative of the state information and which determines the passage of a current in said electrical circuit, ensuring the electrical circuit transmission status information of the switch (5) to the output S, via link galvanic isolation (7), characterized in that, to regulate the intensity of the current in the switch (5), it comprises means generating variable voltage (1) which act complementarily with switching means (12) for selectively feeding elements constituting the electric circuit based on the output voltage of said generating means variable voltage (1) and by the fact that it comprises means of inductive filter (6) in series with the switch (5) and means of capacitive storage (13) which, in steady state, form each storage means and means for recovery of a of the energy of said electrical circuit, according to the output voltage variable voltage generator (1).