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Joined: 23 Feb 2022, 17:06
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Direct Output module pins protection

06 Jun 2022, 19:36


I'm trying to power a relay using one of the pins for the DO Module of my Revolution PI. I also need to have a way to power the same relay using a manual button. Here's a simplified diagram of what I'm trying to do:
RevPI DO in.png
RevPI DO in.png (5.88 KiB) Viewed 2241 times
My question is: Does the DO Module have any built-in protections so the current from the button being pressed doesn't go inside the pin? Or do I need to do place a diode like this to avoid the current going in?
RevPI DO in with diode.png
RevPI DO in with diode.png (6.08 KiB) Viewed 2241 times
Thank you for your help!

- Rodrigo

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