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廈門市泰尼電器有限公司
主營產(chǎn)品： AB模塊PLC |
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廈門市泰尼電器有限公司
主營產(chǎn)品： AB模塊PLC |
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更新時(shí)間：2018-06-03 17:56:49瀏覽次數(shù)：120
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【IC697VAL348】【IC697VAL348】
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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(shù)，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(fù)載的性質(zhì)有關(guān)。
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(hù)措施：一是輸出公共端接熔斷器；二是采用保護(hù)電路，對(duì)交流感件負(fù)載，一般用阻容吸收回路；對(duì)直流感性負(fù)載用續(xù)流二極管。
*部分的PLC的輸出端子采用分組式和分隔式。對(duì)于晶體管輸出型還有源型輸出和漏型輸出兩種形式。*部分的歐美品牌的PLC采用源型輸出，而*部分的亞洲品牌的PLC采用漏型輸出。圖4所示為采用分組式的PLC繼電器輸出電路圖，圖5和圖6所示分別為采用分組式的PLC源型和漏型晶體管直流輸出電路圖。
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