HIGH RELIABILITY PHOTOCONTROL CONTROLS WITH 0 TO 10 VOLT DIMMING SIGNAL LINE AND METHOD
A photocontrol circuit includes a set of light level detection circuitry and a low power consumption power supply that powers the set of light level detection circuitry. In response to a determination that light sensed in ambient environment is at or below the light level threshold, the light level...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A photocontrol circuit includes a set of light level detection circuitry and a low power consumption power supply that powers the set of light level detection circuitry. In response to a determination that light sensed in ambient environment is at or below the light level threshold, the light level detection circuitry switches a 0 to 10V dimming input line to approximately 10V, controlling a luminaire to emit maximum light. In response to a determination that light sensed in ambient environment is above the light level threshold, the light level detection circuitry switches the 0 to 10V dimming input line to less than approximately 0.5 Volts, thereby controlling the luminaire to emit minimum or no light. The photocontrols embodiments described herein advantageously employ the 0 to 10V dimming line as the luminaire control line, unlike previous photocontrols which typically switch the power input to the luminaire. The photocontrol circuit may be housed in a photocontrol module comprising a base and a cover. |
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