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The following table summarizes how to connect Pixhawk 4's PWM OUT ports to PMB’s
PWM-IN ports, depending on the PX4 Airframe Reference. You can find this reference
online in PX4 User guide.
PX4 Airframe Reference
Connection between Pixhawk 4 --> PMB
MAIN: motor
I/O PWM OUT --> I/O PWM IN
MAIN: servo
I/O PWM OUT --> FMU PWM IN
AUX: motor
FMU PWM OUT --> I/O PWM IN
AUX: servo
FMU PWM OUT --> FMU PWM IN
The pinout of Pixhawk 4’s power ports is shown below. The CURRENT signal should carry
an analog voltage from 0-3.3V for 0-120A as default. The VOLTAGE signal should carry
an analog voltage from 0-3.3V for 0-60A as default. The VCC lines have to offer at least
3A continuous and should default to 5.1V. A lower voltage of 5V is still acceptable, but
discouraged.
Power 1, Power 2 port
Specifications：
PCB Current: total 120A outputs (MAX)
UBEC 5v output current :3A
UBEC input voltage : 7~51v (2~12s LiPo)
Dimensions:68*50*10 mm
Mounting Holes:45*45mm
Weight: 40.3g
Pin
Signal
Volt
1(red)
VCC
+5V
2(blk)
VCC
+5V
3(blk)
CURRENT
+3.3V
4(blk)
VOLTAGE
+3.3V
5(blk)
GND
GND
6(blk)
GND
GND