Product Overview
The 150-F251NBDB SMC-Flex Smart Controller from Allen-Bradley is a solid-state motor controller designed for reliable starting and stopping of induction motors. This unit belongs to the Bulletin 150 series and features an open enclosure type with a pump control option. It is built for industrial environments where precise motor control and protection are critical. The controller includes a front keypad and a backlit LCD display for local monitoring and configuration.
Technical Specifications Breakdown
Key parameters for the 150-F251NBDB are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Allen Bradley |
| Product Line | SMC-Flex |
| Input Voltage | 200-480 Volts AC |
| Enclosure Type | Open |
| Operating Temperature (Open) | -5 to 50 Degrees, Celsius |
| Operating Temperature (Enclosed) | -5 to 40 Degrees, Celsius |
| Storage Temperature | -20 to 75 Degrees, Celsius |
| Altitude (Maximum) | 2000 Meters (6560 Feet) |
| Humidity | 5 to 95% (non-condensing) |
| Pollution Degree | 2 |
| Controller Type | Bulletin 150, Solid State Controller |
| Weight | 61.00 lbs (27.67 kg) |
Industry Applications
It is also well-suited for conveyors, fans, and compressors where soft start and current limit start reduce mechanical stress. The dual ramp feature allows customization for different load profiles, improving operational reliability and reducing downtime.
Installation & Setup Guidance
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 location with humidity between 5% and 95% non-condensing and pollution degree 2 environment. For power wiring, use standard squirrel-cage induction motors or Wye-Delta six-lead motors. Control wiring supports 2-and-3-wire configurations for flexible integration. One DPI port is available for optional human interface and communication modules.
Maintenance & Reliability
Regularly inspect the controller for signs of overheating or contamination. Keep the enclosure clean and ensure airflow is not obstructed. The SMC-Flex provides extensive diagnostics including power loss, line fault, voltage unbalance, phase reversal, undervoltage, overvoltage, and controller temperature monitoring. These features help identify issues early, reducing unplanned downtime. The metering options (amp, volt, kilowatt, kilowatt-hour, power factor, motor thermal capacity usage) allow continuous performance tracking.
Compatibility & Integration
The 150-F251NBDB is part of the SMC-Flex family and integrates with Allen-Bradley control systems. It includes four fully programmable auxiliary contacts that can be configured as normal/up-to-speed network or external bypass. Alarm contacts cover overload, underload, undervoltage, overvoltage, unbalance, jam, stall, and ground fault. Status indications include stopped, starting, stopping, at speed, alarm, and fault.
Selection Guide & Purchasing Advice
When selecting the 150-F251NBDB, confirm that the input voltage matches your facility supply (200-480V AC). Verify the enclosure type meets your environmental requirements. AutoDCSTech offers this controller along with expert support to ensure proper selection and integration. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 150-F251NBDB |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
