Technical Specifications Breakdown
Key parameters for the 150-N4A are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Allen Bradley |
| Category | Drives |
| Product Line | SMC-Flex |
| Part Number | 150-N4A |
| Weight | 3.00 lbs (1.36 kg) |
| Item Name | Starting Motor Controller |
| Rated Operation Voltage | 480V to 690 V |
| Operating Frequency | 50/60Hz |
| Integrated Bypass | 108 - 480A |
| Number of Rectifiers | 6 |
| Number of Ports | 3 |
Industrial Applications: Reducing Mechanical Stress
For example, in conveyor systems, the soft start feature prevents belt slippage and material spillage by gradually applying torque. In pump applications, it eliminates water hammer by smoothly ramping up motor speed. The controller's ability to handle 480 to 690 Volts AC at 50 to 60 Hertz makes it suitable for global installations requiring robust motor management.
Installation and Setup Guidance
When installing the 150-N4A, ensure the supply voltage matches the rated operational voltage of 480V to 690V AC. The controller's three connection ports facilitate network communication, additional I/O, or parameter configuration devices. Use the multilingual 20-HIM-A6 keypad with LCD screen for local setup. For advanced configurations, leverage PC-based software to optimize starting and stopping profiles. Always follow the manufacturer's wiring diagrams and torque specifications for power connections.
The Evolution of Motor Control: Precision Meets Reliability
The Allen-Bradley 150-N4A Smart Motor Controller (SMC) from the SMC-Flex series addresses this need with a microprocessor-based soft starter design that maximizes motor performance while minimizing mechanical stress. This controller is engineered for applications requiring smooth acceleration and deceleration, reducing wear on connected equipment and improving overall system uptime.

Maintenance and Reliability
To maintain reliable operation, periodically inspect the controller's LED status indicator for diagnostic information. The multicolored LED provides quick visual feedback on operational status and fault conditions. The Hold-to-Test/Push-to-Rest pushbutton allows manual reset after faults and initiates a test cycle. Ensure the controller's environment is clean and within specified temperature limits. The integrated bypass (108 - 480A) enhances reliability by reducing heat dissipation during full-speed operation.
Compatibility and Integration
The 150-N4A's three ports support network communication modules, expansion I/O, and parameter configuration tools. This scalability allows integration into various automation architectures. The controller can directly control resistive loads using phase-angle control, adjusting output voltage based on a programmable reference. This flexibility makes it compatible with systems requiring precise torque control during start and stop cycles.
Selection Guide and Purchasing Advice
When selecting the 150-N4A, verify that your motor's full-load current falls within the integrated bypass range of 108 to 480A. For lifecycle status and availability, please verify with AutoDCSTech before ordering. AutoDCSTech offers genuine Allen-Bradley parts and expert support to ensure your motor control system operates reliably.
Availability & Condition at AutoDCSTech
| Part Number | 150-N4A |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
