The Allen-Bradley 150-S201NBD is an advanced smart motor controller designed to enhance motor efficiency in three-phase systems. Equipped with a built-in microprocessor and a protective feature against voltage surges, it operates with a line voltage from 200 to 480 Volts AC and supports frequencies between 50 to 60 Hertz. Sporting a robust power rating of 500 horsepower, this controller integrates an internal 201 Amps bypass and an optional external bypass, ensuring versatile protection and operational reliability. A user-friendly interface combines an LCD screen and keypad for configuration and troubleshooting, while various modes like soft start, energy saver, and emergency run provide adaptable functionality. The system is cooled by convection and should not exceed an operating temperature of 50 degrees Celsius, with optional modules enhancing capabilities such as digital I/O and current feedback.