Posts made by Joshi

@dc42 right... note to self sunday morning 3am after a couple of beers is not the time to think tech...

@insertnamehere :
Meanwell HLG-600H : quite interesting that those have contacts to be switched on and off... but having had a look at the price tag ... I guess if I spend that amount of money I would still go with two PSUs but have the high get a high powered one from Puls they offer some with way lower inrush currents -> easyer to find something can handle the current.
24V ... was thinking that at some point as well... might well end up using my old PSU a little longer and when the new frame is strong enough to handle all the motors can give at 12V then switch to 24V (which would then neccesitate a new heated bed and so on...)

@sinned6915 :
ATX PSUs are nice and tough things. But they have way to many small wires bringing out 12V which would have to be replaced with a few stronger ones... Also nowadays you need to make sure they do not have individual 12V circuit build in (or that you can at least connect these circuites i.e. BeQuiet (ATX PSU manufacturer) calls this combining OC mode if I remember correctly). The link to the Duet schematics is very interesting... The search for a data sheed of the mosfet used for PS_ON did bring up this document: https://assets.nexperia.com/documents/data-sheet/PMV40UN2.pdf . It states "Enhanced power dissipation capability of 1000 mW" -> the 2.2W the Finder needs will become a problem here...

@insertnamehere No, I was going to order this weekend. Please share your suggestion.

Thanks again for the quick answer.
Here is the wiring diagram (in case it can help someone else) with huge appologies for the quality. Just realized I did not have a propper program installed so I used paint...
Keep in mind I'm not an electrical engeneer and have not tested this yet. Copy at your own risk.

Thanks for the answer Jacotheron.

My reasoning behind the Finder:

• Inrush current of the RSP-320 is about 40A (@230V)
• I live in Germany and with our Plugs you never know which wire will be the phase -> disconnect both.

Reason for 2 PSUs:
The RD-35A supplies mainly 5V -> Power to the Duet. Added bonus it supplies 12V as well -> better for engaging Finder and operating an electronics cooling fan (maybe heatbreak cooling as well).
RSP- 320 will supply the main 12V for heaters and motors -> duet can shut that one down if anything goes wrong.

Will at a wireing diagram later today.

I'm currently reworking my printer (Anet A6) which is currently pretty much stock (except its running on Duet WiFi and all new wiring). It will be converted to an aluminum frame and some other stuff (Titan aero, bl touch, independend Z motors and endstops ...) soon.
Now I'm thinking about doing a setup like this:
Meanwell RD-35A (https://www.meanwell.com/webapp/product/search.aspx?prod=RD-35) to supply 5V to Duet Wifi (and 12V to 2 Fans and a Finder contactor).
Finder 22.32.0.012.4340 Contactor (https://gfinder.findernet.com/public/attachments/22/EN/S2221_22_23_24EN.pdf oopsie did insert a wrong link...
https://gfinder.findernet.com/public/attachments/22/EN/S22EN.pdf) to route power to a second powersupply.
2nd PSU Meanwell RSP-320-12 (https://www.meanwell.com/webapp/product/search.aspx?prod=RSP-320) to power the rest of the printer (stock Anet heated bed and motors, hotend replaced by 30W E3D heater).

My question is:
When I supply 12V from the RD-35A to the finder contactor and then connect that to the Duet's PS_ON port can it handle the 12V and "high" current needed to engage the Finder contactor?

If needed I can try to draw up a wiring diagram.
Any feedback is appreciated.