Power Management Unit PRO


#1

Hi,

I have some questions regarding PMU PRO.
What is max current (A) for:

  • One 5V independent auxiliary output?
  • One 12V independent auxiliary output?
  • Power1 / Power 2 5V output?

In text presentation text is stated:
"providing two 5V power supplies or a redundant one for your autopilot"
Does that mean that two 5V power supplies for redundant power to Autopilot (Power1 / Power 2) and on other side aux 5v /aux 12v are completely independent or not?

Thank you.


#2

Hi,

That means the PUM has 4 independent power supplies. 2 of them are used for the alimentation of the Pixhawk (Brick 1 and brick 2) and the others for auxiliary outputs. I hope it’s more clear. :slight_smile:


#3

Hi Jarome,

Yes, that is more clear. I already bought some.

But I really need info that i could not find in specs/documentation, what is the max. output current (Amps) on these 4 independent power supplies (for each one, but primarily for 5V aux and 12V aux).
For powering vtx, gimbal, osd, camera power, leds and maybe servos…
Is that 1, 2, 3 or… Amps per power port?

Thank you.


#4

Thank you,
now I find out what I need in shop with updated product info :slight_smile: :

Output voltage: 3x 5V + 1x 12V (3.5A max/output)
Current sensing sensibility : 26.66 mV/A (or 37.51 A/V)
Voltage sensing sensibility ratio : 15.9

Are these settings and this product also working/compatible for Pixhawk 2.1 with Mission Planner?
I tried, voltage is slightly off.
Is MP Voltage divider (Calced) value of 15.9 “exact” or “around” and can be manually adjusted?
Current sensing sensibility (in MP Ampers per volt), 37.51 A/V value is way different. Maybe BATT_AMP_OFFSET” parameter could help?
Like provided for this current sensor: https://drotek.com/en/section/voltage-current-sensor-board/

Thank you.