Meanwell remote turn on question?

[gnydick]

@manne_sahne I'm confused. Just turning off the PSU turns everything off. What am I missing?

[manne_sahne]

@gnydick Yes, thats also a solution.
But i'd like to do that with the Duet, not by hand.
The Duet has that PS_on Pin which can switch on/off a ATX-Style PSU.
short = psu_on
open = psu_off

The Meanwells RC pins work different.
short = psu off
open = psu on

[fma]

To switch the Meanwell PSU on/off, you need to have floating contacts: you can't use PSU_ON signal, as it closes to ground, and I don't think you can wire the ground on the Meanwell on/off inputs.

You can use the same idea @c310 linked, but instead of switching the main line with the relay, just open/close the PSU on/off contacts.

If you want to be able to switch it on, you need to have a dedicated 5V power supply to the Duet (through USB, for example).

[fma]

See: https://forum.duet3d.com/topic/8934/inverting-ps_on-levels/9

[gnydick]

@manne_sahne ah. Is the desire really to have the duet do it, or would a network controlled pdu do?

[dc42]

I would love to be able to give a definitive guide to how to use the remote on/orr on a Meanwell PSU. Unfortunately, the information about it that they give in the datasheet is next to useless.

[sonderzug]

Hi everyone,

you should also consider how the remote Signal wire is connected to the PSU (physically). I've used a similar Meanwell PSU before, and have not been able to find the matching connector anywhere (EDIT: because I obviously can't read , see below… irrelevant, then). You'd have to contact single pins inside the small connector on the PSU (not sure if 1,27 or 2,54 mm spacing).

The easier and more hassle-free way would be to use a relay to switch the Input power to the 24 V PSU. @Jacotheron described this above and in more detail in his answer to my question here. Thank you again.

Best regards, Niklas

[manne_sahne]

@sonderzug You could have used a hrs df11-10ds connector, like described in the datasheet.

[jv43]

@manne_sahne wouldnt a simple inverter IC work?
maybe get a hex inverter IC or a breakout board if you dont want to mess with small smd stuff

[insertnamehere]

@jv43

The Meanwell input is opposite logic to the Duet PS_ON output. I made this circuit up to isolate the Duet from the supply input and to invert the PS_ON output. The +5V is from the Meanwell aux 5V supply which also powers the Duet board in standby. Working now for maybe a 6 months, not a problem. RC- can be left floating.