Multiple location load control system
First Claim
1. A load control device for controlling power to an electrical load from an AC power source, the load control device comprising:
- a semiconductor switch configured to conduct a load current from the AC power source to the electrical load;
a first terminal and a second terminal, the first and second terminals adapted to be coupled to a remote device;
a first switching circuit coupled to the second terminal, the first switching circuit configured to conduct a charging current through the second terminal to power 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 to the electrical load, the control circuit further configured to render the first switching circuit conductive to conduct the charging current to the remote device through the second terminal during a first time period of a present half-cycle of the AC power source, the control circuit further configured to subsequently render the first and second switching circuits conductive and non-conductive on a complementary basis to communicate with the remote device via the second terminal during a second time period of the present 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
19 Claims
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1. A load control device for controlling power to an electrical load from an AC power source, 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; a first terminal and a second terminal, the first and second terminals adapted to be coupled to a remote device; a first switching circuit coupled to the second terminal, the first switching circuit configured to conduct a charging current through the second terminal to power 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 to the electrical load, the control circuit further configured to render the first switching circuit conductive to conduct the charging current to the remote device through the second terminal during a first time period of a present half-cycle of the AC power source, the control circuit further configured to subsequently render the first and second switching circuits conductive and non-conductive on a complementary basis to communicate with the remote device via the second terminal during a second time period of the present 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, 18, 19)
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Specification