| 摘要 |
<p>The present invention provides a signaling System comprising an aspect having a plurality of parallel light sources and connected to the output of a current regulator, said current regulator having; one or more switch mode power supplies connected in parallel to each other, said switch mode power supplies having a corrected power factor, to minimize power consumption, a noise sensing circuitry connected to said switch mode power supplies for sensing noise above a predetermined noise level, and a controller connected to said switch mode power supplies and to said noise sensing circuitry to provide a stable output current in response to the variations in input voltages, to thereby identify any failure of power supplies, light sources, and to provide alarm.</p> |
