Allen Bradley 20BC170A3ANNANA0 PowerFlex 700 AC Drive

Industrial Applications

The Allen-Bradley 20BC170A3ANNANA0 PowerFlex 700 AC Drive is a large-format variable frequency drive designed for industrial motor-control systems that require dependable speed regulation, controlled acceleration, and flexible integration with automated equipment.

The drive is well suited to applications such as heavy-duty conveyors, pumps, fans, compressors, mixers, material-handling equipment, machine tools, process machinery, and other production systems where motor speed needs to be adjusted according to operating conditions.

In a conveyor application, controlled acceleration can help reduce sudden mechanical loading on belts, couplings, gearboxes, and shafts. For pumps and fans, variable-speed operation can allow the motor to respond more closely to process requirements instead of operating continuously at a fixed speed.

The substantial physical construction of the 20BC170A3ANNANA0 makes it particularly appropriate for fixed industrial installations. It measures 976.3 × 403.9 × 275.5 mm and weighs 71.44 kg (157.50 lb), so panel layout, structural support, ventilation, and maintenance access should be considered carefully before installation.

For OEM machine builders, plant engineers, and industrial maintenance teams, the PowerFlex 700 platform offers a mature solution for integrating AC motor control into larger automation systems.

Reliable Variable-Speed Control for Industrial Equipment

The PowerFlex 700 family is designed for applications where motor control needs to be more flexible than simple start-and-stop operation. By regulating the electrical output supplied to an AC motor, the drive can provide controlled acceleration, deceleration, and variable-speed operation.

A properly configured acceleration profile can reduce the electrical and mechanical impact of starting a large motor and load. This is particularly useful for equipment with substantial rotational inertia or long mechanical transmissions.

Deceleration requires similar attention. When a high-inertia load slows down, energy can flow back toward the drive. Applications with aggressive stopping requirements therefore need appropriate drive configuration and consideration of the complete braking strategy.

The drive's monitoring and protection functions can also assist maintenance teams. When a machine stops unexpectedly, technicians can use drive status and fault information together with motor and mechanical inspection to identify the cause more efficiently.

Another advantage is its role within an industrial automation architecture. A PowerFlex 700 drive can operate as part of a coordinated system containing PLCs, HMIs, sensors, interlocks, and other control equipment.

The 20BC170A3ANNANA0 is therefore a strong candidate for industrial installations where robust variable-speed motor control and long-term maintainability are important purchasing considerations.

Technical FAQs

1. What is the Allen-Bradley 20BC170A3ANNANA0?

The 20BC170A3ANNANA0 is an Allen-Bradley PowerFlex 700 AC drive designed for industrial variable-speed motor-control applications.

2. What does an AC drive control?

An AC drive regulates electrical power delivered to a compatible motor, allowing the motor's operating speed and acceleration or deceleration characteristics to be controlled.

3. Why use a variable frequency drive on a conveyor?

A drive allows the conveyor motor to start smoothly and operate at different speeds. This can help reduce mechanical shock and provide greater control over material movement.

4. What motor information should be entered during commissioning?

The motor nameplate and application data should be checked carefully. Relevant parameters can include motor voltage, current, frequency, rated speed, and other values required by the selected control mode.

5. What are common reasons for an overcurrent fault?

Potential causes include excessive load, overly short acceleration time, motor wiring problems, incorrect motor parameters, mechanical obstruction, or a motor fault. The exact fault condition should be identified before changing parameters.

6. Why might an overvoltage fault occur during deceleration?

A high-inertia motor load can regenerate energy while decelerating. If the returned energy causes the drive's DC-bus voltage to exceed its allowable level, an overvoltage fault can occur.

7. What should be checked when the drive faults repeatedly?

Record the exact fault code and determine when the fault occurs. Then inspect the motor, cabling, electrical supply, mechanical load, acceleration/deceleration settings, and other relevant drive parameters.

8. What can cause unstable motor speed?

Possible causes include an unstable reference signal, incorrect drive parameters, unsuitable motor-control settings, excessive mechanical load changes, or problems within the feedback or control system.

9. Why is grounding important for an AC drive?

Proper grounding helps establish a controlled electrical reference and can reduce the effects of electrical noise and interference. Grounding should be implemented according to the drive and machine installation requirements.

10. What should be verified before replacing this PowerFlex 700 drive?

Verify the complete catalog number and compare electrical ratings, motor requirements, control configuration, communication functions, installed options, enclosure arrangement, and application requirements. A similar-looking drive is not necessarily a direct replacement.