Providing adjustable-speed control for a three-phase induction motor, Allen-Bradley 22B-A5P0N104 is a PowerFlex 40 AC drive supplied from a 200…240 V single-phase circuit. The drive sits in the motor power path and converts the fixed-frequency incoming supply into variable-frequency, variable-voltage output for a 0.75 kW / 1 HP motor.

The command path through 22B-A5P0N104 can begin at the integral keypad, the hardwired control terminals or the RS-485 DSI communication port. Sensorless-vector or V/Hz logic processes the selected start source and speed reference, applies the programmed acceleration, deceleration, current limit and stop mode, and then controls the IGBT inverter; relay, opto and analog outputs return operating status to surrounding equipment.

When 22B-A5P0N104 decelerates a motor, the internal brake transistor can switch energy from the DC bus into a correctly selected external braking resistor instead of leaving the bus to rise unchecked. Electronic overload modelling uses the programmed motor current, and stored fault codes distinguish detected overload, bus and output conditions from a missing run command; the N104 construction therefore combines the braking switch and diagnostic functions but still relies on the panel for environmental protection.