Power Manangement Board ESC Wiring

PX4 Autopilot Multicopter 🛸
1

Hello,

I am putting together a drone using the folloiwng parts:

  • PixHawk 4
  • Power management board (PMB)
  • EMAX 2213 motors
  • DJI E-430 Lite ESCs

I am a bit confused the he ESC to PMB wiring. In older PixHawks the ESCs would connect directly to headers “in” the body of the PixHawk body, but with the PixHawk 4 this has moved to the PMB.

Here is a picture of my current wiring setup:

20210222_183519
20210222_1835193024Ă—4032 1.54 MB

Close up of PMB:

IMG_20210222_165241
IMG_20210222_1652413024Ă—4032 827 KB

Close up of ESC:

20210222_164058
20210222_1640583024Ă—4032 368 KB

I would connect the “thick” white wire from the ESC to the B+ port on the PMB, the “thick” black wire to the GND pad on the PMB, the “thin” white wire (from the ESCs servo plug) to the M port (M2 in this case) and the “thin” black wire (from the ESCs servo plug) to the same GND pad of the PMB. Is this correct?

My main concern is the connection of the “thin” black wire (ground), do I just connect it to the GND pad? Because the PX4 website says all ESC connections must have a ground connected but in their diagrams they don’t show it.

Any help would be greatly appreciated!

2

Yes that’s correct. All the grounds will go back to the main battery ground.