Allen-Bradley 150-F85NBD SMC Flex Smart Motor Controller

Product Overview

The Allen-Bradley 150-F85NBD is a solid-state smart motor controller from the SMC-Flex line. It uses computerized control to start and stop line-connected motors, including Wye-Delta 6-lead and standard three-phase squirrel cage induction motors. Unlike conventional starters, it reduces inrush current and torque spikes, protecting both the motor and driven machinery. This unit is rated for 85 Amps and 60 Horsepower at 460 Volts AC, with an open enclosure type.

Technical Specifications Breakdown

Key parameters for the 150-F85NBD are listed below for quick reference:

Industry Applications

This controller is well-suited for applications requiring controlled acceleration and deceleration of motors. In conveyor systems, it minimizes belt stretch and product spillage by gradually ramping up speed. For pump applications, it reduces water hammer by controlling the start and stop torque. The 150-F85NBD also supports multiple starting modes, including soft start and stop, full voltage, dual ramp start, current limit start, selectable kickstart, and slow speed mode, making it adaptable to diverse industrial processes.

Installation & Setup Guidance

Mount the controller vertically with a minimum clearance of 15 cm (6 inches) above and below for airflow. Use power wiring sized from 2.5 to 85 mm² (#14 to 3/0 AWG) and control wiring from 0.75 to 2.5 mm² (18 to 14 AWG). The maximum allowable conductors per control terminal is two wires. The default line connection uses an isolation transformer; optional delta connections with isolation contactor or shorted SCR protection are available. Program the unit via the front 5-button keypad using sequential keystrokes.

Maintenance & Reliability

Periodically inspect the enclosure for dust accumulation and ensure ventilation paths remain clear. The operating temperature range is -5 to 50 °C (23 to 122 °F). Check power wiring connections for tightness annually. The controller includes integrated electronic motor overload protection with programmable trip levels, as well as short-circuit and thermal protection circuitry. Stalling and jamming detection are built-in, with adjustable delay and trip settings.

The Evolution of Motor Control: Why the SMC Flex Matters

Industrial motor starting has evolved from simple across-the-line contactors to intelligent solid-state controllers that reduce mechanical stress and electrical disturbances. The Allen-Bradley 150-F85NBD SMC Flex Smart Motor Controller exemplifies this shift, offering programmable starting modes and integrated protection for three-phase induction motors. For engineers managing 60 HP loads at 460VAC, this controller provides a reliable solution for soft starting, stopping, and safeguarding valuable equipment.

Compatibility & Integration

The 150-F85NBD supports communication protocols such as DeviceNet, Interbus, Allen Bradley Remote I/O, ControlNet, EtherNet, and Profibus when an appropriate communication adapter is installed. It also features built-in DPI communication capabilities and network I/O. The controller includes Smart Motor Braking (SMB) with phase CT, integrated Run/SCR bypass, and four programmable auxiliary contacts.

Selection Guide & Purchasing Advice

When selecting a smart motor controller, match the rated current and voltage to your motor nameplate. The 150-F85NBD is rated for 85 Amps and 60 HP at 460VAC. Verify lifecycle status and availability with AutoDCSTech before ordering. AutoDCSTech stocks this unit and can provide support for integration into new or existing systems.