My post was marked as spam by aksimet.com therefore with picture
@kvi94 Sorry, I do not know that, it is hard to tell.
You can also connect the relay to the output of the SSR instead of the V_FUSED,
then the fans are on as soon as the SSR is switched on,
and the power supply of the Duet 3 is not used,
the Duet 3 will run longer after the SSR is switched of by the reset.
You could also connect the fans to the output of the SSR directly, without a relay.
@kvi94 What if you connect the fans directly to the 24 volt and not through the Duet.
or use an mosfet to switch on the fans, the power supply for the fan connect before the SSR and the
always on the control the mosfet.
It could be that the Duet3 power supply is drained to fast due to the fans power consumption,
due to the reset the PS_ON will be switch of, at start-up it is switch on again,
but if the cpu power supply get to low the cpu will stop (switch off)
I hope the description is understandable.
@kvi94 Hello, This issue is that when you execute the M999 command the board switches of, right?
If you press push button, will it power up then?
The problem is, that due to the reset, the SSR is switched off (PS_ON is off), and will not be switched on again.
I think that the output from the pson is not active after reset.
An SSR is normally not able to use PWM at all, it should be used as a switch on/off only.
The 5Hz frequency means that it should not be switched on/off more that 5 times per second.
It is a replacement of a mechanical relay.
Who would try to use PWM with a mechanical relay?