Pixhawk 4 Wiring Questions

PX4 Autopilot Flight Controllers šŸ’»
21

The white (signal) wire solders to the M(motor number) on the board and the black (ground) can either be left disconnected, or soldered to a ground pad on the board. Thereā€™s some debate about whether or not you need to connect that ground wire, thatā€™s up to you. It definitely wonā€™t hurt anything.

22

I would like to take benefits of this topic, because I wondered same question. Now is clear.

I would like to ask, why there are 2 PWR port connectors in the PX4?

Can I connect a second power source and monitor through the PWR2?

PM07 A <> PWR1
PM07 B <> PWR2

I want to supply power separetly to motors and electronics, and monitor them.

Thanks.