Patent ID: 8035248
Filing Date: 2011-10-11
Classification: F25D

Abstract:
1. A system for energizing loads through a control unit, said loads being energized from a power network, comprising: connecting elements, each comprising a power switch and a processing unit operatively connected to the power switch so as to lead the latter to opening and closing conditions, deenergizing and energizing a respective adjacent load that is electrically coupled to the connecting element; a pair of electrical conductors connected to the power network and which are disposed so as to define an energizing means which is common to the connecting elements and to the control unit; and a single signal conductor not connected to the control unit and to which all of the processing units are connected, the control unit instructing the respective processing units of each of the connecting elements through coded electrical signals, the opening and closing of each respective power switch, wherein each connecting element further comprises: a serial interface operatively connected to an energization inlet terminal, to a communication inlet terminal, and to the processing unit, in order to allow at least one of the operations of energization, in low voltage, of the connecting element and of bidirectional serial communication between said processing unit and the control unit; the serial interface in each of the connecting elements enabling the operation of bidirectional serial communication and extraction of the low voltage for supply to an internal circuit of the respective connecting element; a signal provided by the power network to the connecting element comprises an alternating current including first and second alternating repeating half-cycles; and the serial interface in each of the connecting elements is operative to extract the low voltage for energizing the connecting unit during each first half cycle of the signal provided by the power network and is operative to provide the bidirectional serial communication during each second halve-cycle of the signal provided by the power network.