Active device used in industrial automation control units especially in the railway transportation field, has arrangement whereby there is less heat dissipation in the electronic circuits thus improving efficiency

摘要

The device comprises second electrical feed units (34) called floaters, for ensuring the passage of the first holding current in the first switch when it is closed, under the corresponding potential difference between the second feed units. There is a resistance (23) for adjustment of this first holding current at a predetermined minimal value. There are units (37) for insulating the first and second feed units of these measuring units when the first switch is open. The device is for electronic circuits having first feed units (22) from a first electric circuit (26), a first switch (21) for activating the first electric circuit, with first measuring unit (27,28) of an input signal of the first electric circuit, this device comprises a first holding circuit (33) connected to terminals of this first switch.