[?]: DAMAGED SIMATIC CPU 314 by 230VAC

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Dkubalov
Posts: 1
Joined: Tue Jan 14, 2014 7:00 pm

[?]: DAMAGED SIMATIC CPU 314 by 230VAC

Post by Dkubalov » Thu Nov 03, 2016 9:40 pm

Hello all,
I have to solve how to repair a damaged CPU314PN/DP by 230VAC, which came to 24VDC power supply line.
Does anybody know, which components could be damaged on PCB?
Unfortunately on PCB I see no sign of a damage.
Pictures are here for download
https://dl.dropboxusercontent.com/u/27536342/Photos.zip

Many thanks for any advice :haha:
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CoMod
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Re: [?]: DAMAGED SIMATIC CPU 314 by 230VAC

Post by CoMod » Fri Nov 04, 2016 6:12 am

1st -test fuse "OMF"
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boont
Posts: 28
Joined: Wed Sep 05, 2012 8:18 pm

Re: [?]: DAMAGED SIMATIC CPU 314 by 230VAC

Post by boont » Sat Nov 05, 2016 9:37 am

First check fuses, and protection diodes in the supply chain.
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