The Allen-Bradley 150-F251NBDD SMC Flex controller has a variety of features, such as power wiring and control wiring for installation, a keypad and software for setup, 1 DPI port for connection to an optional human-machine interface, starting and stopping modes, protection and diagnostics, metering, alarm contact, status indication, and auxiliary contacts. For controller installation, the power wiring is done with a standard squirrel-cage induction motor or a Wye-Delta, 6-lead motor. The keypad for setup on the 150-F251NBDD controller possesses a front pad with a backlit LCD screen, and the software for setup has parameter values that can be downloaded to the SMC-Flex controller. The starting and stopping modes include the soft start, current limit start, dual ramp, full voltage, linear speed acceleration, preset slow speed, and the soft stop.

The protection and diagnostics features on the 150-F251NBDD SMC Flex controller include power loss protection, line fault protection, voltage unbalance protection, excessive starts per hour protection, and phase reversal protection. The metering includes measurements in Amps, Volts, kW, kWH, mWH, elapsed time, power factor, and motor thermal capacity usage. The alarm contact features include overload, underload, undervoltage, overvoltage, unbalance, jam, stall, and ground fault alarms. Status indicators on the controller are able to dictate when the controller is starting, stopping, up to speed, sounding an alarm, and experiencing a fault. The last of the standard features on the 150-F251NBDD SMC Flex controller are the auxiliary contacts, which includes 4 programmable contacts. Optional features on the SMC Flex controller include pump control and braking control, which help to reduce fluid surges in pumping systems and provide motor braking and controlled position stopping. The 150-F251NBDD controller has an input line voltage of 200 to 480 Volts AC and a control voltage of 100 to 240 Volts AC. The environmental conditions include an operating temperature of -5 to 50 degrees Celsius without an enclosure and one of -5 to 40 degrees Celsius with an enclosure, The storage or transportation temperature range should be from -20 to 75 degrees Celsius, The maximum installation altitude is 2000 meters above sea level, the relative non-condensing humidity range should be between 5 and 95%, The 150-F251NBDD controller can be installed and used in an environment with a pollution degree 2 hazard rating.