Great, that just helped me.
Now all fan positions are switched to 12V.

Thanks for the support.

Actually, I would like to have all fan slots on 12 V, 4 of them always switched on and a space for the component fan running on software PWM.

@Phaedrux said in Duet 2 Ethernet 12V Fan wiring:

Ok well you can't measure anything usable off the fan ports unless you have configured them. The always on fan ports should measure with the same voltage as the Vfan pin is being fed.

Ah OK I understand. So I have to configure each fan individually. Do you have any instructions on how to configure the fans for the 12 V?

@Phaedrux said in Duet 2 Ethernet 12V Fan wiring:

Ok, and how are your fans configured when you're measuring them?

So far I have only connected the buck converter to the 12V + pin on the jumper slot as shown in the top picture. I have not yet made another active config in the firmware.

@Phaedrux said in Duet 2 Ethernet 12V Fan wiring:

What pins are you actually checking? There is nothing labeled port 1 2 3 4 5, so I'm not sure what you're measuring.

I measured the yellow framed FAN pins.

is there any of the Duet employees here who can give me a comment on why this is so?

So I did it with the Buck converter. I then measured the individual fan ports with a multimeter. However, I see at port 1 and 2 12V at port 3 the voltage only jumps back and forth. With port 4 this is stable again at 12V and with port 5 is a voltage of 2.4V only indicated to me?

what can this cause?

Hello everybody,

I want to operate all 5 fan slots on the Duet 2 Ethernet to 12V. If I understand that correctly, I have to remove the jumper and connect the 12V + cable from the Stepdown Converter output to the V_Fan_Pin in the middle as in the picture below. Is that correct so far? What is outlined in yellow with the 2 jumpers on the right, do they stick or do they have to be removed? Or what are these jumpers for? On the pinout I can not understand what is meant by the two (INT 5V EN and EXT 5V EN) jumpers or what they are for?

When I ask my question, I refer a little to this article here.

https://forum.duet3d.com/topic/4917/wiring-issues-5-v-12-v-waterpump-24-v-psu

Basically, it should be similar to the structure here, only since I actually want to connect 5x 12V fans.

Thank you for your help or feedback on my question.

best regards

Zappelmann

thank you for the fast reaction.

I ordered it from Filafarm.de.
https://www.filafarm.de/products/duet-ethernet?variant=31372764840047