Fecha de publicación: 02/10/2014 Fuente: Wipo "digitalization" A two-way load control system (100) comprises a power device (110), such as a load control device for controlling an electrical load (104) receiving power from an AC power source (102), and a controller (120) adapted to be coupled in series between the source and the power device (110). The load control system (100) may be installed without requiring any additional wires to be run, and is easily configured without the need for a computer or an advanced commissioning procedure. The power device (110) receives both power and communication over two wires. The controller (120) generates a phase-control voltage and transmits a forward digital message to the power device by encoding digital information in timing edges of the phase-control voltage. The power device transmits a reverse digital message to the controller via the power wiring.