Radio-frequency lighting control system with occupancy sensing

摘要

A load control system controls a lighting load provided in a space and comprises a load control device and one or more occupancy sensors. The load control device controls the load in response to the wireless control signals received from the occupancy sensors. Each occupancy sensor transmits an occupied control signal to the load control device in response to detecting an occupancy condition in the space and a vacant control signal to the load control device in response to detecting a vacancy condition. The load control device adjusts the intensity of the load to a first intensity in response to receiving the occupied control signal from at least one of the occupancy sensors, and adjusts the intensity of the load to a second intensity less than the first intensity (e.g., a non-off intensity) in response to receiving vacant control signals from both of the occupancy sensors.

主权项

1. A load control system for controlling the amount of power delivered from an AC power source to a lighting load provided in a space, the load control system comprising:
a load control device adapted to be coupled in series electrical connection between the AC power source and the lighting load for controlling the amount of power delivered to the lighting load to control the intensity of the lighting load, the load control device operable to receive wireless control signals and to control the intensity of the lighting load in response to the wireless control signals; and two occupancy sensors, each operable to independently detect an occupancy condition in the space and to transmit an occupied wireless control signal to the load control device in response to detecting the occupancy condition, the occupancy sensors further operable to transmit a vacant wireless control signal to the load control device in response to detecting a vacancy condition in the space; wherein the load control device adjusts the intensity of the lighting load to a first intensity in response to receiving the occupied wireless control signal from at least one of the occupancy sensors, and adjusts the intensity of the lighting load to a second intensity less than the first intensity in response to receiving vacant control signals from both of the occupancy sensors, the load control device associating a unique identifier with each occupancy sensor and storing in respective memory locations an occupancy/vacancy status of each occupancy sensor in accordance with its unique identifier, the load control device adjusting the intensity of the lighting load to a second intensity when the occupancy/vacancy statuses of the memory locations for both of the occupancy sensors denote vacancy.