The 150-F251NBDB SMC-Flex Smart Controller by Allen-Bradley contains a front keypad and a backlit LCD display, with the option of power and control wiring. For power wiring, the SMC-Flex controller contains a standard squirrel-cage induction motor or a Wye-Delta, six-lead motor. With respect to control wiring, the SMC-Flex uses a 2-and-3-wire control for a variety of applications. One DPI is included for connection to optional human interface and communication modules. Starting and stopping modes on the 150-F251NBDB include soft start, current limit start, dual ramp, full voltage, linear speed acceleration, preset slow speed, and soft stop. Protection and diagnostics options include power loss, line fault, voltage unbalance, excessive starts per hour, phase reversal, undervoltage, overvoltage, controller temperature, stall, jam, open gate, overload, underload, and communication fault.

Metering options on the 150-F251NBDB SMC-Flex are vast, including amp, volt, kilowatt, kilowatt-hour, megawatt, megawatt-hour, elapsed time, power factor, and motor thermal capacity usage. Alarm contacts include overload, underload, undervoltage, overvoltage, unbalance, jam, stall, and ground fault. Status indications include stopped, starting, stopping, at speed, alarm, and fault. Regarding auxiliary contacts, the SMC-Flex has four fully programmable contacts as normal/up-to-speed network or external bypass. Optional features on the 150-F251NBDB include pump and braking control. Operating temperature on the SMC-Flex Smart Controller should be held between -5 and 50 Degrees, Celsius (open) and between -5 and 40 Degrees, Celsius (enclosed). Storage and transportation temperature should be between -20 and 75 Degrees, Celsius. The 150-F251NBDB Smart Controller should not be operated at an altitude exceeding 2000 Meters, or 6560 Feet. Humidity should be held between 5 and 95%, non-condensing, and the Smart Controller has a pollution degree of 2.