Product Overview
The Allen-Bradley 150-F85NBRB is a Bulletin 150 SMC-Flex solid-state motor controller designed for reliable soft starting and stopping of three-phase AC induction motors. This open-style unit is rated for 85 A and supports motors from 15 to 60 Hp at 460V AC. As an industrial automation module, it provides precise control over motor acceleration and deceleration, reducing mechanical stress and extending equipment life.
With an input line voltage range of 200–480V AC and a 24V AC/DC control voltage, the 150-F85NBRB integrates easily into existing control systems. The built-in pump control option makes it particularly suitable for pump applications where controlled start and stop sequences prevent water hammer and pressure surges.
Key Features & Benefits
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Bulletin 150 solid-state design – ensures smooth, stepless motor starting and stopping.
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85 A continuous rating – suitable for a wide range of medium-duty industrial motors.
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Wide input voltage range – 200–480V AC, three-phase, 50/60 Hz, adaptable to various global installations.
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Low control voltage – 24V AC/DC, compatible with modern PLC and DCS systems.
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Pump control option – specifically engineered for pump applications to minimize hydraulic shock.
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Open enclosure – designed for panel mounting where ambient conditions are controlled.
Technical Specifications
| Parameter |
Value |
| Controller Type |
Bulletin 150, Solid State Controller |
| Enclosure Type |
Open |
| Input Line Voltage |
200..480V AC, 3-Phase, 50/60Hz |
| Control Voltage |
24V AC/DC |
| Control Options |
Pump Control |
| Important Note |
24V AC/DC control requires a separate 120V or 240V single-phase supply for fan operation. |
Applications
The Allen-Bradley 150-F85NBRB is ideal for a variety of industrial applications where controlled motor starting is essential. Typical use cases include:
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Pump systems – the pump control option reduces pressure surges and mechanical wear, making it perfect for water supply, irrigation, and wastewater treatment plants.
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Conveyor lines – smooth acceleration prevents product damage and reduces belt stress.
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HVAC equipment – fans and compressors benefit from reduced inrush current and quieter operation.
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Machine tools – precise starting and stopping improve machining accuracy and extend tool life.
Installation & Setup
When installing the 150-F85NBRB, ensure the controller is mounted in a clean, dry panel with adequate ventilation. The open enclosure requires a minimum clearance around the unit to dissipate heat effectively. Connect the three-phase input lines to the marked terminals, and wire the control voltage (24V AC/DC) to the appropriate control terminals. For pump control operation, follow the wiring diagram provided in the product manual to connect the pressure transducer or float switch.
Remember that the 24V AC/DC control circuit requires a separate 120V or 240V single-phase supply to operate the internal cooling fan. Verify that this auxiliary supply is available before energizing the controller.
Maintenance & Reliability
Routine inspection of the Allen-Bradley 150-F85NBRB ensures long-term reliability. Periodically check for dust accumulation and clean the heatsink and fan with dry compressed air. Inspect all power and control connections for tightness, as thermal cycling can loosen them over time. The solid-state design eliminates mechanical contact wear, but the internal fan should be checked for proper operation. In pump applications, verify that the pump control settings remain aligned with the system requirements to maintain optimal performance and energy efficiency.
Selection Guide
Before purchasing, confirm that the 150-F85NBRB matches your motor's full-load current and your system voltage. This unit is rated for 85 A and accepts 200–480V AC input, making it suitable for motors up to 60 Hp at 460V AC. Ensure your control system provides the required 24V AC/DC control signal. For applications that do not need pump control, verify that this model's options align with your needs. If you have any doubts, consult the technical documentation or contact a specialist. PLC Source PRO offers genuine Allen-Bradley components and can assist with product selection.