The Allen-Bradley 150-F251NBDD SMC Flex controller offers robust functionality with its capability for both soft and linear speed starts using standard squirrel-cage induction and Wye-Delta motors. Equipped with comprehensive protection features such as power loss, line fault, voltage unbalance, and phase reversal, this controller also provides precise metering for Amps, Volts, and power consumption metrics. It supports an input line voltage range of 200 to 480 Volts AC and ensures reliable operation in temperatures from -5 to 50 degrees Celsius, accommodating various industrial environments and installation conditions up to an altitude of 2000 meters.