Understand APM Power Consumption
Each APM consumes 1.6W in the worst case scenario. This assumes that the backlight is on full intensity and that both analog outputs are sourcing 20mA.
The table below shows the maximum current required at various PSU voltages:
PSU Voltage | Max Current (mA) |
12 | 133 |
15 | 107 |
24 | 67 |