Multiple location load control system
First Claim
1. A load control system for controlling an amount of power delivered to an electrical load from an AC power source, the system comprising:
- a load control device adapted to be coupled between the AC power source and the electrical load to control the amount of power delivered to the electrical load, the load control device comprising a first terminal and a second terminal, the load control device comprising a first switching circuit coupled to the second terminal, and a second switching circuit coupled between the first and second terminals; and
a remote device adapted to be coupled to the first terminal and the second terminal of the load control device, the remote device comprising a power supply configured to conduct a charging current from the AC power source through the first switching circuit of the load control device;
wherein the load control device is configured to control the second terminal in an active pull-up state by rendering the first switching circuit conductive and the second switching circuit non-conductive, the load control device further configured to control the second terminal into an active pull-down state by rendering the second switching circuit conductive and the first switching circuit non-conductive, the load control device configured to render the first switching circuit conductive to allow the power supply of the remote device to charge through the second terminal during a first time period of a half-cycle of the AC power source, the load control device and the remote device operable to communicate with each other by controlling the second terminal into the active pull-up state and the active pull-down state during a second time period of the half-cycle of the AC power source.
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Accused Products
Abstract
A load control device may include a semiconductor switch, a control circuit, and first and second terminals adapted to be coupled to a remote device. The load control device may include a first switching circuit coupled to the second terminal, and a second switching circuit coupled between the first terminal and the second terminal. The control circuit may be configured to render the first switching circuit conductive to conduct a charging current from an AC power source to a power supply of the remote device during a first time period of a half-cycle of the AC power source, and further configured to render the first and second switching circuits conductive and non-conductive to communicate with the remote device via the second terminal during a second time period of the half-cycle of the AC power source.
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Citations
20 Claims
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1. A load control system for controlling an amount of power delivered to an electrical load from an AC power source, the system comprising:
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a load control device adapted to be coupled between the AC power source and the electrical load to control the amount of power delivered to the electrical load, the load control device comprising a first terminal and a second terminal, the load control device comprising a first switching circuit coupled to the second terminal, and a second switching circuit coupled between the first and second terminals; and a remote device adapted to be coupled to the first terminal and the second terminal of the load control device, the remote device comprising a power supply configured to conduct a charging current from the AC power source through the first switching circuit of the load control device; wherein the load control device is configured to control the second terminal in an active pull-up state by rendering the first switching circuit conductive and the second switching circuit non-conductive, the load control device further configured to control the second terminal into an active pull-down state by rendering the second switching circuit conductive and the first switching circuit non-conductive, the load control device configured to render the first switching circuit conductive to allow the power supply of the remote device to charge through the second terminal during a first time period of a half-cycle of the AC power source, the load control device and the remote device operable to communicate with each other by controlling the second terminal into the active pull-up state and the active pull-down state during a second time period of the half-cycle of the AC power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A load control device for controlling an amount of power delivered to an electrical load from an AC power source, the load control device adapted to be coupled to a remote device, the load control device comprising:
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a semiconductor switch configured to conduct a load current from the AC power source to the electrical load; first and second terminals adapted to be coupled to the remote device; a first switching circuit coupled to the second terminal, the first switching circuit configured to conduct a charging current from the AC power source to a power supply of the remote device; a second switching circuit coupled between the first terminal and the second terminal; and a control circuit configured to control the semiconductor switch to control the power delivered to the electrical load, the control circuit configured to render the first switching circuit conductive to conduct the charging current from the AC power source to the power supply of the remote device during a first time period of a half-cycle of the AC power source, the control circuit further configured to render the first and second switching circuits conductive and non-conductive to communicate with the remote device via the second terminal during a second time period of the half-cycle of the AC power source. - View Dependent Claims (19, 20)
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Specification