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140DDO84300
PLC運行時CPU從輸入映像寄存器讀取輸入信息并進行處理，將處理結果放到輸出映像寄存器。輸出映像寄存器由輸出點相對應的觸發器組成，輸出接口電路將其由弱電控制信號轉換成現場需要的強電信號輸出，以驅動電磁閥、接觸器、指示燈等被控設備的執行元件。
輸出接口電路通常有三種類型：繼電器輸出型、晶體管輸出型和晶閘管輸出則。每種輸出電路都采用電氣隔離技術，電源由外部提供，輸出電流一般為1.5—2A，輸出電流的額定值與負載的性質有關。
為使PLC避免受瞬間大電流的作用而損壞，輸出端外部接線必須采用保護措施：一是輸出公共端接熔斷器；二是采用保護電路，對交流感件負載，一般用阻容吸收回路；對直流感性負載用續流二極管。極大部分的PLC的輸出端子采用分組式和分隔式。對于晶體管輸出型還有源型輸出和漏型輸出兩種形式。極大部分的歐美品牌的PLC采用源型輸出，而極大部分的亞洲品牌的PLC采用漏型輸出。
備貨，備貨，降降降，火火火，火火火……
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