Abstract: An occupancy sensing system includes a vacate input to cause the system to turn lights on without substantial delay when a monitored space becomes occupied after turning the load off in response to the vacate input. A special vacate input may be eliminated by determining, in response to a manual-off input, if the space has been vacated. A dead time may be included to prevent the lights from being turned back on by movement that is detected as occupants vacate the monitored space after pressing a vacate or manual-OFF button.

Abstract: A digital lighting control network protocol with forward and backward frames, each of the frames including an error check code. A no-acknowledgment (NAK) signal is sent from a receiving node to a transmitting node responsive to the error check code. An interface circuit of the receiving node may include an energy storage section to store at least some energy from the network while receiving digital signals, and an output section to transmit digital signals to the network using the stored energy. The interface circuit may also include a high voltage buffer circuit. The transmitting node may send forward frames to receiving nodes based on device type.

Abstract: An apparatus and method for enabling an automatic calibration sequence for a light control system having a daylight harvesting scheme is disclosed herein. An ambient light sensor connects to a detection circuit for detecting the amount of ambient light within a given zone. A microprocessor connects between the detection circuit and a dimming circuit for providing control to initiate dimming and to start the auto-calibration sequence. Responsive to the amount of ambient light detected, the dimming circuit controls the power supplied to a plurality of electrical loads. A storage unit connects to the microprocessor for storing minimum light levels assessed during the auto-calibration sequence wherein the ambient light levels are monitored for a predetermined amount of time to determine the lowest level of ambient light generated for the purpose of setting and storing a target voltage level associated with such.

Abstract: A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor connected to a detection circuit for detecting the amount of ambient light within a given zone and converting the light signal to an digital one. A control device couples to receive a predetermined rate of change for each respective zone from a storage unit along with the converted digital signal. The control device connects each zone of a plurality of electrical loads to control the power supplied to the electrical load at the predetermined corresponding rate of change and responsive to the amount of ambient light detected.

Abstract: A system may include a switch arranged to control a lighting load, a processor arranged to control the switch, and a failsafe circuit arranged to monitor the processor and actuate the switch if the processor fails. The failsafe circuit may have a time constant, and may be arranged to actuate the switch if the monitor signal does not include a pulse during a period of time equal to the time constant.

Abstract: A system may include a light sensor, an actuator having a range of motion, and a circuit adapted to establish a light level setpoint in response to the light sensor and the actuator. The circuit may be adapted to perform a first function when the actuator is in a first region of the range of motion and a second function when the actuator is in a second region of the range of motion.

Abstract: A system including multiple control system devices. The control system devices include a processor; a memory coupled to the processor and configured to store code for the control system device; and a communication interface coupled to the processor. A control system device is configured to receive updated code corresponding to at least one of the control system devices, and configured to transmit the updated code to the corresponding at least one of the control system devices.

Abstract: A module including a case; an electrical switching device configured to control power to a load; and a controller coupled to the electrical switching device. The electrical switching device and the controller are substantially encapsulated by the case. Functionality of the module can be exposed through a communication interface in the case.

Abstract: A module including a case; an electrical switching device configured to control power to a load; and a controller coupled to the electrical switching device. The electrical switching device and the controller are substantially encapsulated by the case. Functionality of the module can be exposed through a communication interface in the case.

Abstract: A wireless demand response endpoint includes a power switch and a wireless receiver to control the power switch in response to a wireless demand signal. The wireless demand signal may be transmitted at the same premises as the endpoint. One or more wireless endpoints at the premises may be configured to respond to the wireless demand signal. The wireless demand signal may be transmitted automatically, manually, or in other modes. Power switching may be on/off, dimming, etc.

Abstract: An electrical component may include a vent located in a mounting portion of a case to vent a blast from within the case. A chassis may have a mounting site for an electrical component, wherein the mounting site includes a passage to receive a blast from the electrical component. A system may include a chassis having a mounting site to engage a mounting portion of a case for an electrical component, wherein the mounting portion of the case includes a vent, and the chassis forms at least a portion of a blast chamber to receive a blast from the vent.

Abstract: A system including an accessible electrical box; a wireless receiver to receive a wireless signal from an occupancy sensor; a power switch to control power to a load; and a controller to control the power switch in response to the wireless signal. The wireless receiver, controller, and power switch are included in the accessible electrical box.

Abstract: The present invention discloses an apparatus and method for converting a low voltage occupancy sensor to a powered stand-alone unit. The invention uses a low voltage occupancy sensor mounted in an upper portion of a housing with its associated low voltage wiring terminating in a terminal block. An attachable corresponding lower housing is provided with a power pack adapted to connect with the low voltage terminal block wherein once combined the upper and lower housing portions combine to form an integral powered stand-alone sensor unit.

Abstract: An electrical component may include a vent located in a mounting portion of a case to vent a blast from within the case. A chassis may have a mounting site for an electrical component, wherein the mounting site includes a passage to receive a blast from the electrical component. A system may include a chassis having a mounting site to engage a mounting portion of a case for an electrical component, wherein the mounting portion of the case includes a vent, and the chassis forms at least a portion of a blast chamber to receive a blast from the vent.

Abstract: An apparatus and method for enabling an automatic calibration sequence for a light control system having a daylight harvesting scheme is disclosed herein. An ambient light sensor connects to a detection circuit for detecting the amount of ambient light within a given zone. A microprocessor connects between the detection circuit and a dimming circuit for providing control to initiate dimming and to start the auto-calibration sequence. Responsive to the amount of ambient light detected, the dimming circuit controls the power supplied to a plurality of electrical loads. A storage unit connects to the microprocessor for storing minimum light levels assessed during the auto-calibration sequence wherein the ambient light levels are monitored for a predetermined amount of time to determine the lowest level of ambient light generated for the purpose of setting and storing a target voltage level associated with such.

Abstract: An apparatus and method for enabling an automatic calibration sequence for a light control system having a daylight harvesting scheme is disclosed herein. An ambient light sensor connects to a detection circuit for detecting the amount of ambient light within a given zone. A microprocessor connects between the detection circuit and a dimming circuit for providing control to initiate dimming and to start the auto-calibration sequence. Responsive to the amount of ambient light detected, the dimming circuit controls the power supplied to a plurality of electrical loads. A storage unit connects to the microprocessor for storing minimum light levels assessed during the auto-calibration sequence wherein the ambient light levels are monitored for a predetermined amount of time to determine the lowest level of ambient light generated for the purpose of setting and storing a target voltage level associated with such.

Abstract: A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor connected to a detection circuit for detecting the amount of ambient light within a given zone and converting the light signal to an digital one. A control device couples to receive a predetermined rate of change for each respective zone from a storage unit along with the converted digital signal. The control device connects each zone of a plurality of electrical loads to control the power supplied to the electrical load at the predetermined corresponding rate of change and responsive to the amount of ambient light detected.

Abstract: A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor connected to a detection circuit for detecting the amount of ambient light within a given zone and converting the light signal to an digital one. A control device couples to receive a predetermined rate of change for each respective zone from a storage unit along with the converted digital signal. The control device connects each zone of a plurality of electrical loads to control the power supplied to the electrical load at the predetermined corresponding rate of change and responsive to the amount of ambient light detected.

Abstract: A light control system having a multi-button low voltage adaptable switch compatible with a two input switch control system where each input can have any one of three values yielding a number of states thus mimicking the functionality of a two button light control switch system. Features such as dimming and daylight harvesting are also disclosed herein. For implementation of a daylight harvesting feature, an ambient light sensor is connected to a detection circuit for sensing and detection of the ambient light level. A number of user-controlled actuators are connected to a decoder that translates a command into a command compatible with the two-input switch.

Abstract: A method for defining an area of interest or a trip line using a camera by tracking the movement of a person within a field of view of the camera. The area of interest is defined by a path or boundary indicated by the person's movement. Alternatively, a trip line comprising a path between a starting point and a stopping point may be defined by tracking the movement of the person within the camera's field of view. An occupancy sensor may be structured to sense the movement of an occupant within an area, and to adjust the lighting in the area accordingly if the occupant enters the area of interest or crosses the trip line. The occupancy sensor includes an image sensor coupled to a processor, an input facility such as a pushbutton to receive input, and an output facility such as an electronic beeper to provide feedback to the person defining the area of interest or the trip line.