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PI filter for industrial controller board

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anotherbrick

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hello dear forum ,

I want design a industrial controller board ( PLC like )
the board will run with external 24 VDC and max current drawn will be 1 Amper

I will put a PI filter at the power input to suppress unwanted EMI

I will use 2 x 100 nF for caps
I want ask what uH value must be the inductor ?

anyone who can share a practical info ?

thanks
 

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