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nelamurire incarcator meanwell PB-120P-27P


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Va salut, am primit un incarcator de acumulatori Mean Well  cu denumirea de mai sus, defect. Am schimbat puntea redresoare si siguranta si merge dar am o nelamurire la care nu am gasit raspuns pe net. La iesire are 3 fire:

-rosu plus

-albastru minus

-gri ???

Intre rosu si albastru am 27,4 V.

Intre albastru si gri am 17,5 V.

Am atasat si poze unde se vede unde este lipit al treilea fir. O fi pentru ventilator(desi e cam mare tensiunea)? Ca in mufa aferenta de pe PCB nu vine nimic.

2019-05-20-05-50-48.jpg

2019-05-20-05-50-59.jpg

2019-05-20-05-51-19.jpg

 

In documentatii pe site-ul mean well nu am gasit explicatia.

Multumesc

 

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