Product Overview

The Allen-Bradley 20BC072A0AYNANC0 PowerFlex 700 AC Drive is a high-power industrial variable frequency drive designed to control the speed, torque, and operation of compatible three-phase AC motors. Manufactured by Rockwell Automation under the Allen-Bradley brand, this drive is intended for industrial applications requiring reliable motor control, configurable operating parameters, and integration with automated production systems.

The PowerFlex 700 series was developed for a broad range of industrial motor-control requirements, including material handling, processing equipment, pumps, fans, and general manufacturing machinery. By adjusting the frequency and voltage supplied to a motor, the drive enables equipment to operate at speeds suited to changing production demands.

The 20BC072A0AYNANC0 is designed for a nominal 400 V AC three-phase supply and has a continuous output current rating of 72 A. Its rated output power is 37 kW under normal-duty conditions and 30 kW under heavy-duty conditions. These ratings make it suitable for appropriately selected motors used in medium- to high-power industrial equipment.

This configuration includes vector control with 24 V I/O, conformal coating, a braking IGBT, and an EMC filter with a common-mode choke. It does not include an installed human interface module (HIM), an internal braking resistor, an internal communication module, or a feedback option.

These configuration details are important when specifying the drive for a new installation or replacing an existing unit. Drives within the same product family may have different voltage ratings, current capacities, communication interfaces, feedback options, and braking configurations.

The PowerFlex 700 20B series has been discontinued. The 20BC072A0AYNANC0 may still be required for maintaining existing installations, so accurate catalog-number verification and careful assessment of replacement compatibility are essential when sourcing this industrial component.

Technical Specifications

Note: Verify the product nameplate, series, and physical dimensions before installation. The supplied dimensions and weight are listing values and should be distinguished from packaged shipping measurements.

Function and Working Principle

The PowerFlex 700 AC drive regulates the electrical power delivered to a motor. It converts incoming AC power into a controlled output, allowing motor speed and operation to be adjusted according to the selected control mode and programmed parameters.

1. Variable-Frequency Motor Control

Motor speed is closely related to the frequency of the electrical supply and the motor’s design. By varying the output frequency, the drive enables a motor to operate at different speeds within its permitted operating range.

For example, a conveyor may need to accelerate gradually when production begins and operate at a different speed as material flow changes. A variable frequency drive allows the control system to adjust motor speed without relying exclusively on mechanical speed-changing equipment.

This flexibility can improve process coordination and help reduce unnecessary mechanical stress when acceleration and deceleration settings are appropriately configured.

2. Vector Control

The 20BC072A0AYNANC0 uses a vector-control configuration. Vector control provides more advanced management of motor torque and speed than a basic frequency-only control approach.

When configured correctly for the connected motor, vector control can support improved torque response and speed regulation under changing load conditions. This is useful for machinery that must maintain predictable operation during acceleration, deceleration, or changes in mechanical demand.

Actual performance depends on the motor characteristics, parameter settings, tuning procedure, and operating conditions.

3. Acceleration and Deceleration Management

The drive allows engineers to configure motor acceleration and deceleration according to application requirements.

Appropriate acceleration ramps can reduce sudden mechanical loads on couplings, belts, gears, and driven equipment. Controlled deceleration can improve stopping behavior and help coordinate machine sequences.

For high-inertia loads, frequent stopping, or rapid speed changes, the braking-energy requirements must be evaluated. This model includes a braking IGBT but does not include an internal braking resistor.

4. Motor Protection and Diagnostics

PowerFlex 700 drives provide monitoring and protective functions designed to help identify abnormal operating conditions. Depending on the configuration and application, relevant conditions can include overcurrent, voltage abnormalities, overheating, and motor overload.

Correct motor data, suitable protective devices, proper grounding, and accurate parameter configuration remain necessary. Drive protection should be considered part of a complete electrical protection strategy rather than a replacement for upstream circuit protection or machine safety systems.

5. Electromagnetic Compatibility

The specified configuration includes an EMC filter and common-mode choke. These components help manage electromagnetic interference when the drive is installed and wired in accordance with the applicable requirements.

Proper grounding, cable shielding, routing, and cabinet layout are also important. The presence of an EMC filter does not guarantee compliance under every installation condition.

Role in Industrial Control Systems

The 20BC072A0AYNANC0 functions as the motor-control component within a wider industrial automation system. It is typically installed between the incoming power supply and a compatible motor, while receiving commands from a PLC, operator interface, or other control arrangement.

PLC Integration

A programmable logic controller can coordinate the drive with sensors, actuators, interlocks, and other machinery. Depending on the system design, the PLC may issue start and stop commands, provide speed references, and monitor operating status.

This model uses 24 V I/O and does not include an internal communication module in the specified configuration. Engineers should therefore verify the intended command interface and actual installed hardware before designing the PLC connection.

A communication network should not be assumed to be present merely because the PowerFlex 700 family supports optional communication solutions.

HMI and Operator Control

A human-machine interface can display operating status, alarms, process variables, and operator commands. In many installations, the HMI communicates with a PLC, which then coordinates the drive.

The 20BC072A0AYNANC0 is supplied without an installed HIM. If local operator access or drive programming is required, the maintenance team should confirm the supported interface and the appropriate programming procedure.

Coordination with Industrial Equipment

The drive can support motor operation within coordinated manufacturing processes. For example, a PLC may adjust conveyor speed in response to production flow or coordinate a pump with pressure-control logic.

Reliable system integration requires the drive, motor, control program, instrumentation, and mechanical equipment to be configured as a complete system.

Industrial Applications

With a 37 kW normal-duty rating and a 72 A continuous output current, the 20BC072A0AYNANC0 is intended for suitably rated industrial motor applications. Final selection must account for load characteristics, overload requirements, environmental conditions, and the required control functions.

1. Conveyor and Material-Handling Systems

Industrial conveyors transport products, raw materials, and bulk goods between production stages. A variable frequency drive can regulate conveyor speed and coordinate movement with upstream and downstream equipment.

For high-inertia conveyors, engineers should evaluate starting torque, acceleration time, braking requirements, and the effects of load variation.

2. Pumping Systems

Industrial pumping applications may require variable-speed operation to respond to changing flow or pressure demands. When the pump, motor, and process are suitable for variable-speed control, a drive can help regulate output and reduce unnecessary throttling.

The pump’s operating curve, minimum speed, fluid characteristics, and motor current should be reviewed before configuring the drive.

3. Industrial Fans and Ventilation Equipment

Large ventilation systems and industrial fans may benefit from adjustable motor speed when airflow requirements vary. Reducing fan speed can lower energy consumption in appropriate applications, although the actual savings depend on system design and operating conditions.

The motor and drive must be selected for the required load profile, and the installation must provide adequate cooling and environmental protection.

4. Process Machinery

Mixers, processing equipment, and other industrial machines may require controlled acceleration, adjustable speed, and stable motor operation. Vector control can be useful when load conditions vary or when torque response is important.

The required motor rating and control performance should be verified against the process requirements before the drive is selected.

5. Manufacturing and Production Lines

Manufacturing facilities often coordinate multiple motors to maintain production flow. A properly integrated PowerFlex 700 drive can provide speed control for compatible machines and support sequencing through a PLC-based automation system.

For synchronized applications, engineers must confirm the available I/O, control response, communication requirements, and feedback needs. This specific configuration has no feedback option and no internal communication module.

Installation and System Integration

Correct installation supports electrical safety, reliable operation, and long-term equipment performance.

1. Verify Electrical Compatibility

Confirm that the incoming power supply matches the drive’s 380–480 V voltage class and three-phase input requirements. Check the motor nameplate for voltage, current, power, frequency, and speed.

The 37 kW normal-duty rating and 30 kW heavy-duty rating are not interchangeable. Select the applicable rating according to the load and operating duty, and ensure that the motor current remains within the drive’s permitted limits.

2. Confirm Panel Dimensions and Clearances

The supplied dimensions are 517.5 × 222 × 200 mm. Confirm these measurements against the manufacturer’s dimensional drawing for the exact drive and series.

Allow adequate space for cooling airflow, wiring access, maintenance, and heat dissipation. The IP20 / NEMA Type 1 configuration does not provide a sealed enclosure suitable for direct exposure to water or unrestricted industrial contaminants.

Where necessary, install the drive in an appropriately rated cabinet and account for the cabinet’s thermal performance.

3. Power Wiring and Grounding

Install power, motor, control, and grounding conductors according to the applicable installation instructions and local electrical codes.

Use correctly rated cables and upstream protective devices. Separate control wiring from power conductors where required to reduce electrical interference. Follow the manufacturer’s requirements for grounding, shielding, and cable termination.

Before installation or maintenance, isolate the power supply and follow the required lockout and verification procedures. The DC bus may retain hazardous voltage after the supply is disconnected, so observe the specified discharge waiting period and verify the safe condition before working on the equipment.

4. Configure Motor Parameters

Enter the correct motor nameplate data and configure the control mode, speed reference, command source, acceleration and deceleration times, and applicable protective settings.

For vector-control operation, follow the manufacturer’s setup and tuning procedures. Incorrect motor parameters may cause unstable operation, poor speed regulation, inadequate torque response, or nuisance trips.

5. Evaluate Braking Requirements

This configuration includes a braking IGBT but does not include an internal braking resistor.

The IGBT is a switching component used in a braking circuit; it does not itself dissipate regenerated energy. If the application involves frequent deceleration, rapid stopping, or high-inertia loads, determine whether an approved external braking resistor or another braking arrangement is required.

Check braking resistor compatibility, resistance value, power rating, duty cycle, wiring, and protection against the manufacturer’s specifications. Do not assume that the presence of a braking IGBT means the drive can satisfy every stopping requirement without additional hardware.

6. Commission and Test the System

Before returning the equipment to service, inspect the wiring, grounding, cooling paths, and motor connections.

Test start and stop commands, motor direction, speed references, acceleration and deceleration, interlocks, and fault responses. Confirm that the control system behaves correctly under representative operating conditions.

Record the final parameters and preserve the configuration information for future maintenance or replacement.

Compatible System Components

The 20BC072A0AYNANC0 can be used with a range of components in an appropriately engineered motor-control installation. Compatibility depends on the electrical ratings and the actual control architecture.

The components above are examples of equipment that may be used in a complete installation. They are not necessarily supplied with the drive.

Alternative Models and Replacement Considerations

The PowerFlex 700 20B series has been discontinued. For an existing installation, replacement selection should consider the original drive’s electrical specifications, control requirements, and installed options.

Before approving a replacement, compare:

• Input voltage and phase configuration.
• Continuous output current and overload capability.
• Normal-duty and heavy-duty power ratings.
• Control method and speed-regulation requirements.
• Control I/O voltage and terminal assignments.
• Communication and feedback requirements.
• Braking IGBT and resistor configuration.
• EMC filtering and environmental protection.
• Mounting dimensions, ventilation, and wiring access.
• PLC program, parameter settings, and commissioning procedures.

A replacement drive with a similar power rating is not necessarily a drop-in substitute. Changes to the control interface, braking circuit, parameter structure, or wiring may require engineering modifications.

Key Advantages

High-Power Motor Control

The 72 A continuous output rating and 37 kW normal-duty rating support appropriately sized industrial motor applications requiring adjustable-speed operation.

Vector-Control Capability

The specified vector-control configuration can support improved torque response and speed regulation when correctly configured for the connected motor.

Configurable Acceleration and Deceleration

Programmable ramp settings help match motor response to the requirements of the machinery and production process.

Integrated Braking IGBT

The installed braking IGBT provides a braking-circuit capability. External braking hardware may still be required, depending on the application’s energy and stopping requirements.

EMC Filtering

The included EMC filter and common-mode choke help manage electromagnetic interference when the drive is correctly installed and wired.

Conformal Coating

The specified configuration includes conformal coating, which can provide additional protection for electronic assemblies under appropriate environmental conditions. It does not make the drive suitable for unrestricted exposure to water or corrosive contaminants.

Support for Legacy Industrial Systems

The PowerFlex 700 family remains relevant to maintenance and repair projects involving installed industrial equipment. Accurate model identification helps buyers source the correct configuration and plan a suitable replacement strategy.

Technical FAQs

1. What is the Allen-Bradley 20BC072A0AYNANC0?

It is a PowerFlex 700 AC drive designed for variable-speed control of compatible three-phase motors. It has a nominal 400 V AC supply rating, 72 A continuous output current, and a 37 kW normal-duty power rating.

2. What is the heavy-duty rating?

The specified heavy-duty power rating is 30 kW. The appropriate rating depends on the motor, load characteristics, and required overload capability.

3. What input voltage does this drive require?

The drive belongs to the 380–480 V voltage class, with a nominal supply rating of 400 V AC, three-phase. Verify the nameplate and installation documentation before connecting the equipment.

4. Does the 20BC072A0AYNANC0 include a braking resistor?

No. It includes a braking IGBT but does not include an internal braking resistor. Applications that regenerate energy during deceleration may require an approved external braking solution.

5. Does this model include an operator panel?

No. The specified configuration has a blank plate and no installed HIM. Confirm the required local programming and operator-access method before commissioning.

6. Can this drive be integrated with a PLC?

Yes. It can be integrated into a suitable PLC-based control system. However, the exact control method must be designed around its 24 V I/O configuration and the absence of an internal communication module.

7. Is the PowerFlex 700 20B series still in production?

No. The series was discontinued on November 30, 2023. Availability of this catalog number depends on remaining inventory, repair services, and the industrial spare-parts market.

8. Can this drive replace another 37 kW model?

Not automatically. Confirm voltage class, output current, duty rating, control mode, communication options, braking configuration, and physical dimensions before substitution.

9. What should be checked when purchasing a used unit?

Check the complete catalog number, series, nameplate, visible condition, terminals, cooling components, and available test information. Confirm whether accessories are included and establish the applicable warranty and return terms.

10. What are the dimensions and weight of this model?

The supplied listing values are 517.5 × 222 × 200 mm and 18.55 kg. Verify the exact unit and distinguish the drive’s own weight from its packaged shipping weight.

Procurement and Maintenance Recommendations

Because the PowerFlex 700 20B series is discontinued, procurement should begin with exact catalog-number verification rather than selection by product family or power rating alone.

When sourcing the 20BC072A0AYNANC0, compare the catalog number on the product label with the required installation specification. Confirm the 400 V voltage class, 72 A output rating, duty ratings, vector-control configuration, conformal coating, EMC filter, and braking arrangement.

For new-old-stock, refurbished, or used equipment, request clear nameplate photographs and information about the unit’s condition and test status. Verify whether the drive is supplied with accessories, and confirm warranty and return conditions before ordering.

During maintenance, keep the cabinet and cooling paths clean, inspect terminals and grounding connections, and follow the manufacturer’s procedures for servicing and stored-energy precautions. Preserve the parameter configuration and document any changes made during troubleshooting or commissioning.

For replacement projects, assess whether the existing motor, PLC program, control wiring, braking circuit, and cabinet can be retained. A newer drive may require control-program changes, wiring modifications, parameter conversion, or recommissioning.

Conclusion

The Allen-Bradley 20BC072A0AYNANC0 PowerFlex 700 AC Drive is a 400 V AC three-phase industrial variable frequency drive rated at 72 A continuous output, 37 kW normal duty, and 30 kW heavy duty. Its specified configuration includes vector control with 24 V I/O, conformal coating, a braking IGBT, and EMC filtering.

The drive does not include an internal braking resistor, an installed HIM, or an internal communication module. As the PowerFlex 700 20B series has been discontinued, careful catalog-number verification, condition assessment, and compatibility checks are essential when sourcing this drive for industrial maintenance or replacement applications.