Does anyone use the PS_on port on the Duet 3

pogo1213

I have been looking into controlling when one of my power supplies is on since it has a fan that is away on and can get annoying.

This is the power supply I want to power down and I also have a 5v power supply just for the raspberry that is fanless and can stay on.
https://www.meanwell.com/productPdf.aspx?i=469

At this point, I'm just looking for some insight into how someone is using it so I don't screw something up.

Cheers,

This post is deleted!

achrn

That PSU doesn't seem to have a control input, so you'll need to do it just be switching the mains input. So either use a relay or an SSR to switch the mains live going to the main PSU.

If using a bare relay you need one with a 5V coil, and you'll need to put a protection diode across the coil. Alternatively, use a 5V relay module or SSR that says it works with arduino.

Note that most of those relay modules don't comply with standards about isolating the mains voltage from the low voltage parts on the PCB, so the result probably won't meet your local electrical safety laws.

If using an SSR bear in mind that all the SSRs on ebay are fakes that don't get close to their stated rating. Buy your SSR from somewhere reputable, and even doing that use one rated two-to-four times your nominal requirement (the SSR rating is for an ideal resistive load with plenty of heatsinking on the SSR). You want a 'zero crossing' or 'zero switching' SSR.