Mode
By default, the power outputs act as voltage clamps. They can however perform a number of different functions:
Voltage Clamp
Above the Max Voltage, the Sabertooth will route power to a resistor bank you have attached to the power output, instead of your battery or power supply.
Brakes
The power output will power brakes.
Controllable Output
A power output can be used as an additional controllable output in USB and User Modes.