Power feeding system and method

A power feeding method, wherein

• a center device including a power-sourcing side unit for performing power feed control to a remote terminal, generates a control signal for controlling supply and suspension of power to a main load as a circuit or device that realizes the principal function of said remote terminal and transmits the control signal by superimposing the control signal on the power supplied to said remote terminal;
• and
• said remote terminal includes a power-receiving side unit that receives externally supplied power, the main load, a switch that connects a power-receiving side unit with the main load when a switch is on and disconnects said power-receiving side unit from said main load when said switch is off, and a control signal receiver that receives the control signal that is transmitted by being superimposed on the power supplied from said center device,
• said switch is turned on or off in accordance with the control signal received at said control signal receiver.

A center device includes:

• a power-feeding side device that performs power feed control to a remote terminal;
• and,
• a control signal transmitter that generates a control signal for controlling supply and suspension of power to a main load as a circuit or device that realizes the principal function of said remote terminal, and
• the control signal is transmitted by being superimposed on the power supplied from said power-sourcing side unit to said remote terminal.

A remote terminal being supplied with power from a center device, comprising:

• a power-receiving side unit that receives power supplied form said center device;
• a main load as a circuit or device that realizes the principal function thereof;
• a switch that connects the power-receiving side unit with said main load when said switch is on and disconnects said power-receiving device from said main load when said switch is off;
• and,
• a control signal receiver that receives the control signal that is transmitted by being superimposed on the power supplied from said center device to turn said switch on or off in accordance with the control signal.