SYSTEM AND METHOD FOR SUPPLYING POWER TO SURVEILLANCE VIDEO CAMERAS AND PROTECTION CASES FOR SUCH VIDEO CAMERAS

摘要

The present invention relates to a power supply system for video cameras (2) and for protection cases (1) for video cameras. The system comprises a first device (13), called as powered device since it receives power from a remote device, able to split a supply voltage (131) and a data signal (130) from a power supply input line (18). A plurality of power supply lines (14a-14e) are connected to a first output of the powered device (13) and they supply a plurality of electric components (7,8,9,10) via the supply voltage (131) extracted by the powered device (13). The system further comprises a power supply equipment (19) connected to the powered device (13) so as to receive as input the supply voltage and the data signal split by the powered device. A case and a method for powering a video camera are also described.

主权项

1. Power supply system for video cameras and for protection cases for video cameras, comprising
a powered device able to split a supply voltage and a data signal from a power supply input line, a plurality of internal power supply lines connected to a first output of the powered device to power a plurality of electric components via said supply voltage, a power supply equipment connected to the powered device so as to receive as input the supply voltage and the data signal split by the powered device, the power supply equipment being able to supply on an output line an output voltage and the data signal, a control circuit operatively connected to said plurality of internal power supply lines and to said power supply equipment, wherein the power supply equipment is intended to inform the control circuit about the electric power requested on the output line, and wherein the control circuit is configured so as to stop or reduce power absorption from one or more of the internal power supply lines in case the electric power requested by the electric components and by the power supply equipment exceeds a predetermined value.