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What is the purpose of ‘power failure’ input in RX?

April 26, 2017input purpose Rx

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What is the purpose of ‘power failure’ input in RX?

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It is an input to the video recording server typically used for wiring the output signal pin from an uninterruptible power supply (UPS). UPS provides backup power in certain period and sends a power failure signal to RX when the main power does not work. Then, the UPS should provide a dry contact output for RX to get an event triggered.