Run 12 VDC micro-processor from 480 VAC power supply
P=UI law gives 3*12=36W under 12V.

Now you need to account for efficiency loss of your 24V - 12V converter which is 90% efficient (10% loss), the power consumption on the 24V will be 40W.

The PSB24-060S-3 module is capable of 60W which is plenty enough for your application.

The answer is YES, it will work; but...

As much as the 24V power supply seems robust, I don't think the 12V is worth trusting when I read that...


  If the ambient temperature exceeds 45 ℃ , please reduce the power output,Or enhance heat dissipation


Your call