開關量輸入/輸出電路的隔離
（1）開關量輸入電路的隔離 考慮控制電路的抗干擾性能，開關量輸入、輸出電路均應采用光電耦合器。帶光電耦合器的開關量輸入電路如圖1所示。外電路電源電壓為+15V，plc的電源電壓為+5V，兩個電源是隔離的。當開關K斷開時，光電耦合器的發光二極管熄滅，光敏管呈高阻特性，A點為低電平，經與門后輸出電壓為低電平。當開關K閉合時，光電耦合器的發光二極管發光，光敏管呈低阻特性，A點為高電平，經與門電路后輸出電壓為高電平。
——————廈門泰尼電氣有限公司———————————
*所有備件的質保期均為1年，經過專業測試認證。
*如果您需要訂購產品超過1件，請與我們，我們可以為您提供折扣。
*我們僅采用快遞方式遞送備件。（順豐）
*如果您發現其他供貨商為相同產品提供更為低廉的價格，我們也愿意參照其價格向您提供進一步的折扣。
如果還有其他任何問題，請隨時與我們。
*請讓我們知道您有任何，備品，備件，的需要，我們可以給您進一步的援助，我們等候您的詢盤。
————————廈門泰尼電氣有限公司———————————————
：小劉
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公司地址：廈門海滄街道濱湖一里7號2008室
IC697CPU780
IC697CPU780
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RED LION CONTROLS APLRI-600 NSFP APLRI600
