REVERSE CONNECTION-PROOF CIRCUIT AND METHOD FOR DIRECT CURRENT INPUT TERMINAL AND DIRECT CURRENT INPUT DEVICE

摘要

A reverse connection-proof protection circuit for a direct current input terminal and a reverse connection-proof protection method for a direct current input terminal, comprising: a controllable disconnection attachment, a voltage sampling unit, and a control unit; the controllable disconnection attachment is connected between the positive and negative poles of the direct current input terminal and the circuit of the ensuing stage; the voltage sampling unit is parallelly connected between the positive and negative poles of the direct current input terminal, and is used for collecting in real time the voltage signals between the positive and negative poles and for transmitting the sampling results to the control unit; the control unit is connected separately to the voltage sampling unit and the controllable disconnection attachment, and is used to determine whether the positive and negative poles of the direct current input terminal are reversely connected according to the sampling results of the voltage sampling unit; if a reverse connection is determined, the controllable disconnection attachment is controlled to disconnect, and if a normal connection is determined, the controllable disconnection attachment is controlled to attract and close. Compared to the prior art, the present invention lowers costs and reduces system energy consumption.