The Allen-Bradley 150-A500NBD is a smart motor controller designed for 3-phase squirrel-cage induction motors in critical applications. It belongs to the SMC Plus controller family, which offers three standard operating modes in a compact design that simplifies installation and configuration. This intelligent soft motor starter handles motors rated from 5 to 500 Horsepower and supports 200 to 480 Volts AC, with a current rating of 500 Amps at 48 Volts AC and a peak repetitive inverse voltage of 1400 Volts AC.
The 150-A500NBD provides a soft start with selectable kick start, current limit start, and full voltage start as standard modes. It includes energy-saving functionality for low-load situations and offers stall protection for both starting and running phases. The controller features advisory and diagnostics LED indicators showing status for conditions such as stalled motors, temperature faults, line faults, energy saver mode, and more.
Equipped with two programmable auxiliary contacts (one normally open and one normally closed), the 150-A500NBD can be set for up-to-speed or instantaneous operation. Configuration is managed through DIP and rotary switches, supporting both 2- and 3-wire control. It has an open style design suitable for ambient temperatures from 0 to 50 degrees Celsius. The controller weighs around 90 pounds and has approximate mounting dimensions of 20 x 24 x 12 inches (width x height x depth).
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