Product Overview
The Allen-Bradley 150-F251NBDB is a Bulletin 150 SMC-Flex Smart Controller engineered for precise motor management in demanding industrial environments. This industrial automation module delivers soft start and stop capabilities to reduce mechanical stress and improve process control. With an input voltage range of 200-480 Volts AC, the 150-F251NBDB adapts to a variety of power systems.
Featuring a backlit LCD display and front keypad, the controller provides clear status feedback and easy configuration. The open enclosure type suits panel-mount installations where ambient conditions are controlled.
Technical Specifications
Every parameter listed below comes directly from the product datasheet for the Allen-Bradley 150-F251NBDB, ensuring accuracy and reliability.
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Manufacturer: Allen-Bradley
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Category: Drives
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Product Line: SMC-Flex
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Part Number: 150-F251NBDB
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UPC: 662073059981
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Weight: 61.00 lbs (27.67 kg)
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Series: Panelview 300
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Input Voltage: 200-480 Volts AC
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Enclosure Type: Open
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Display Type: LCD
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Operating Temperature (Open): -5 to 50 Degrees Celsius
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Operating Temperature (Enclosed): -5 to 40 Degrees Celsius
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Storage Temperature: -20 to 75 Degrees Celsius
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Altitude (Maximum): 2000 Meters (6560 Feet)
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Humidity: 5 to 95% (non-condensing)
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Pollution Degree: 2
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Controller Type: Bulletin 150, Solid State Controller
Key Benefits & Performance
The 150-F251NBDB supports multiple starting and stopping modes including soft start, current limit start, dual ramp, full voltage, linear speed acceleration, preset slow speed, and soft stop. These options allow you to tailor motor acceleration to your specific load requirements, reducing inrush current and mechanical wear.
Protection and diagnostics cover 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. This comprehensive suite safeguards your motor and connected equipment.
Metering capabilities include amp, volt, kilowatt, kilowatt-hour, megawatt, megawatt-hour, elapsed time, power factor, and motor thermal capacity usage. Alarm contacts monitor overload, underload, undervoltage, overvoltage, unbalance, jam, stall, and ground fault. Status indications show stopped, starting, stopping, at speed, alarm, and fault conditions.
Applications
The Allen-Bradley 150-F251NBDB suits a wide range of industrial applications, particularly those involving pumps, fans, conveyors, and compressors. For pump control, the optional pump control feature helps minimize water hammer and pressure surges. The controller handles both standard squirrel-cage induction motors and Wye-Delta six-lead motors, offering wiring flexibility.
In HVAC systems, the soft start and stop modes extend equipment life by reducing torque spikes. In material handling, the dual ramp and linear speed acceleration improve load positioning and reduce product damage. The controller's robust diagnostics also help maintenance teams identify issues before they cause downtime.
Installation & Setup
When installing the 150-F251NBDB, ensure the ambient temperature stays within the specified range: -5 to 50°C for open enclosures and -5 to 40°C for enclosed setups. Mount the unit in a clean, dry location away from excessive vibration. For power wiring, follow local electrical codes and use appropriately rated conductors. The controller supports both 2-wire and 3-wire control schemes, simplifying integration with existing control circuits.
Connect the DPI port to optional human interface modules or communication modules as needed. Before energizing, verify all wiring against the wiring diagram and confirm the input voltage matches your supply (200-480V AC).
Maintenance & Reliability
Regular inspection of the 150-F251NBDB helps maintain reliable operation. Check for dust accumulation on the heatsink and ensure ventilation paths remain clear. Periodically verify that all terminal connections are tight and free from corrosion. Monitor the LCD display for any alarm or fault indications and address them promptly.
Because the controller operates over a wide temperature range, avoid exposure to temperatures outside the storage limits (-20 to 75°C) during transport or downtime. Also, keep humidity between 5% and 95% non-condensing to prevent moisture damage.
Selection & Buying Guide
Before purchasing the 150-F251NBDB, confirm that your motor's full-load current and voltage ratings fall within the controller's capabilities. Check the enclosure type (open) and ensure your panel provides adequate cooling. If you require optional features like pump or braking control, verify that your unit includes those options.
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