Allen Bradley 20BC170A0ANNAND0 PowerFlex 700 AC Drive

Industrial Applications

The Allen-Bradley 20BC170A0ANNAND0 PowerFlex 700 AC Drive is designed for industrial motor-control systems where dependable variable-speed operation, controlled acceleration, and integration with automated production equipment are important. As part of the PowerFlex 700 family, it is intended for demanding applications that require more flexibility than a conventional motor starter can provide.

Typical applications include heavy-duty conveyors, pumps, fans, compressors, mixers, material-handling systems, machine tools, process equipment, and production machinery. The drive allows engineers to adjust motor operating conditions to suit the process rather than running the motor continuously at a single fixed speed.

In conveyor systems, for example, controlled acceleration can reduce mechanical shock to belts, gearboxes, couplings, and transported products. In pump and fan applications, variable-speed control can help the motor respond more closely to changing process requirements.

The 20BC170A0ANNAND0 is a large industrial drive, with dimensions of 976.3 × 403.9 × 275.5 mm and a listed weight of 71.44 kg. This physical format makes it particularly suitable for fixed industrial installations where appropriate cabinet space, structural support, ventilation, and service access can be provided.

For industrial automation projects, the PowerFlex 700 platform offers a practical way to integrate motor speed control into a broader Allen-Bradley control environment.

Built for Flexible Industrial Motor Control

One of the key benefits of the PowerFlex 700 platform is its ability to provide controlled variable-speed motor operation. Rather than switching an AC motor directly between stopped and full-speed conditions, the drive can manage acceleration and deceleration according to configured parameters.

This can be particularly valuable with high-inertia loads. A heavy conveyor or rotating process machine may require a carefully controlled acceleration profile to prevent excessive current demand and mechanical stress.

The same principle applies during stopping. When a motor decelerates, energy from the rotating load can return toward the drive's DC bus. Proper drive configuration is therefore important for applications involving rapid stopping or high-inertia loads.

The drive also provides configurable monitoring and protection functions that help maintenance personnel identify abnormal operating conditions. Fault information can provide useful clues when investigating motor overload, overcurrent, DC-bus conditions, control problems, or other drive-related issues.

Another advantage is its suitability for integration into industrial automation systems. The drive can form part of a coordinated control architecture in which PLCs, operator interfaces, sensors, and motor-control equipment work together to execute a production process.

The 20BC170A0ANNAND0 is therefore well suited to installations where a substantial industrial AC drive is required and where reliability, controllability, and maintainability are important purchasing considerations.

Technical FAQs

1. What is the Allen-Bradley 20BC170A0ANNAND0?

It is a PowerFlex 700 AC drive designed for industrial variable-speed control of compatible AC motors.

2. What is the main purpose of the PowerFlex 700 drive?

The drive controls AC motor operation by regulating the electrical output supplied to the motor. Depending on the application configuration, this allows controlled speed, acceleration, deceleration, and motor operation.

3. Why is variable-frequency control useful for industrial motors?

Variable-frequency control allows motor speed to be adjusted according to process requirements. It can also provide smoother starting and stopping than direct-on-line motor starting.

4. What motor information should be entered into the drive?

The drive should be configured using the correct motor nameplate and application information, including relevant voltage, current, frequency, speed, and other parameters required by the selected motor-control mode.

5. What are common causes of an overcurrent fault?

An excessive mechanical load, short acceleration time, motor wiring problems, incorrect motor parameters, mechanical obstruction, or motor faults can contribute to an overcurrent condition. The actual fault code and operating circumstances should be examined before making adjustments.

6. Why can rapid deceleration cause an overvoltage fault?

During rapid deceleration, a high-inertia motor load can regenerate energy back into the drive. If the DC-bus voltage rises beyond its allowable level, the drive may trip on overvoltage.

7. How should a recurring drive fault be diagnosed?

Identify the exact fault and determine when it occurs. Check whether it appears during startup, acceleration, steady-state operation, or deceleration, then inspect the motor, electrical supply, wiring, mechanical load, and relevant drive parameters.

8. What happens if acceleration time is set too aggressively?

The drive may demand a large amount of current to accelerate the motor and load rapidly. If the motor or drive cannot provide the required current, an overcurrent or overload condition may occur.

9. What should be checked when the motor receives no output from the drive?

Check active faults, drive enable conditions, start commands, speed reference, control-source configuration, motor wiring, interlocks, and programmed operating parameters.

10. Can the drive be commissioned without the motor connected?

Drive-specific commissioning procedures vary, and some tests can be performed without normal motor operation. However, the exact procedure should follow the applicable drive configuration and safety requirements rather than applying generic test methods.