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樓主  發(fā)表于: 2010-07-09 15:47
本人碰到過(guò)一例FX2N-64MR-001, PLC電源損壞,由于是輸入點(diǎn)的接近開(kāi)關(guān)線(xiàn)路短路導致PLC DC24V短路,PLC電源燒毀,指示燈不亮,拆開(kāi)PLC檢查結果為PLC開(kāi)關(guān)電源輸入部分沒(méi)問(wèn)題,電源輸出部分的DC24V輸出電源模塊SK 8050S IC短路,SK 8050S是牌子為三墾的電源芯片,在本PLC中是作DC24V輸出的,,由于沒(méi)有同型號PLC更換,也沒(méi)有芯片,但有一臺FX2N-16MR PLC ,FX2N系列PLC,電源部分結構差不多,只是功率有區別而已,FX2N-16MR 內有電源模塊SK 8050S,把此SK 8050S拆下,裝到FX2N-64MR-001里面,通電,一切正常,后購回一個(gè)SK 8050S芯片,把FX2N-16MR 也修復了,本例闡述了PLC維修過(guò)程,維修有時(shí)也可以變通,但不能降低修理標準,PLC屬于精密器件,內部PCB板是雙面線(xiàn)路,拆裝比較麻煩,需要用到吸錫槍,焊接時(shí)注意,不要把線(xiàn)路弄壞,焊點(diǎn)不要粘連,焊接完成后用酒精等清理一下,


這個(gè)例子在PLC輸出端接+24V com處外接個(gè)24V電源,PLC是不會(huì )運行的,因為PLC24V模塊已經(jīng)短路,,所以應該視電源損壞程度而定
應查清楚!!大家可以參考一下!!

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