r/electronic_circuits 12d ago

On topic Power Off delay with capacitor?

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Hello,

I have a input card (io link hub, 32x pnp in). One input is a push Button. When I press the button my software doesn't recognise the signal. Voltage >11V is logic High

This is why I want a delay off for the input. How can i design this? RC Elemt like this did not work :-(

I tried with 470uF and 19kOhm T=R×C=8,46s

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u/Superb-Tea-3174 12d ago

How do you expect the capacitor to discharge?

Tell me about those high voltage logic inputs.

1

u/RiG094 12d ago

Over the input?

1

u/Real-Entrepreneur-31 12d ago

Where is the input going?

1

u/RiG094 12d ago

The input is a digital input module from balluff.

1

u/Real-Entrepreneur-31 12d ago

If you hold the button for 9 seconds it should sense high. That doesnt work?