Allen-Bradley 20BC085A3ANNANC0 AC Drive — Technical Specifications, Product Introduction, Applications, Advantages, and Related Models

1. Product Overview

The 20BC085A3ANNANC0 is a model in the PowerFlex 700 family of industrial adjustable-frequency AC drives. It is designed to regulate the speed and operation of compatible three-phase AC motors used in industrial machinery, production lines, and material-handling systems.

This model belongs to the 85 A, 400 V-class drive range. The associated power ratings for this drive class are approximately 45 kW under normal-duty conditions and 37 kW under heavy-duty conditions. The applicable rating depends on the load profile, motor current, overload requirements, ambient temperature, and installation conditions.

The PowerFlex 700 family is used in applications where a motor needs more flexibility than fixed-speed operation can provide. Typical examples include conveyors, pumps, fans, mixers, processing equipment, and other industrial machines that require controlled acceleration, adjustable operating speed, or integration with a machine-control system.

The complete catalog number is important when identifying the installed configuration. The target model contains the A3 designation, so its voltage, control, enclosure, and option details should be checked against the actual nameplate before the drive is ordered or replaced. Similar model numbers may have different control interfaces, braking hardware, communication options, or feedback capabilities.

The specifications below provide a structured technical overview. Mechanical dimensions and weight are presented as approximate frame-level reference values where an exact model-specific drawing has not been established. They should be verified before cabinet design, shipment planning, or replacement work.

2. Brand and Product Series

3. Detailed Technical Specifications

3.1 Electrical Parameters

The 85 A output-current rating is one of the most important parameters when selecting this drive. The motor’s rated current must be checked against the drive’s capacity, taking account of the application duty, ambient temperature, installation conditions, and any required overload capability.

The 45 kW rating is associated with the normal-duty specification for this model. Applications with high starting torque, repeated acceleration, or frequent overloads may require a different duty assessment. The nominal motor power alone is not sufficient to confirm suitability.

3.2 Mechanical and Physical Parameters

Weight clarification: Catalog listings for this model may show different weight figures, depending on the data field or configuration record. The detailed mechanical specification for the corresponding Frame 4 configuration lists approximately 24.49 kg for the drive and 29.03 kg including packaging. A separate listing gives a lower weight figure. For shipping, mounting, or replacement planning, use the nameplate, the exact mechanical drawing, and the measured unit weight where necessary.

3.3 Installation Parameters

4. Product Introduction

The 20BC085A3ANNANC0 is an industrial AC drive designed to control motor speed and operation in equipment that needs adjustable-speed performance. Rather than running a motor at a single fixed speed, the drive changes its electrical output to regulate the motor’s operating speed within the permitted range.

This flexibility is useful in manufacturing environments where equipment needs to run at different speeds during startup, production, material transfer, or shutdown. It can also help coordinate a motor-driven machine with other equipment in a production line.

The model has a rated output current of 85 A and a listed power rating of 45 kW. It is intended for applications where the motor and load require a higher current capacity than compact, low-power drives typically provide.

The LCD and full numeric keypad provide a local interface for monitoring drive information and changing supported parameters. The absence of an installed communication module means that network integration should be checked carefully when the drive is used with a PLC, HMI, or supervisory controller.

The PowerFlex 700 family is an established industrial drive platform. When maintaining an existing installation, the full catalog number, hardware revision, parameter settings, and wiring arrangement should be recorded before a replacement is ordered.

5. Main Product Functions

5.1 Adjustable Motor Speed

The drive regulates the frequency supplied to a compatible AC motor, allowing the motor to operate at different speeds as required by the machine.

For a conveyor, this may allow slower operation during loading and faster operation during normal production. For a pump or fan, it may allow the operating speed to be adjusted according to process demand, provided the equipment is suitable for variable-speed operation.

5.2 Controlled Acceleration

The drive can be configured to increase motor speed over a selected period rather than starting abruptly.

A suitable acceleration ramp can help reduce sudden mechanical loading on belts, couplings, gearboxes, shafts, and driven machinery. The required ramp time depends on the load inertia, starting torque, and the production process.

5.3 Controlled Deceleration

The drive can reduce motor speed according to a programmed deceleration ramp. This is useful when a machine needs a controlled stop rather than an abrupt loss of power.

The braking arrangement must be considered when the load has substantial inertia or requires rapid stops. This model is listed without an installed brake IGBT, so a braking solution should not be assumed to be available without further verification.

5.4 Local Monitoring and Parameter Adjustment

The LCD and full numeric keypad provide a local operator interface. Depending on the active configuration, users can monitor drive status, review faults, and adjust supported operating parameters.

The precise menu structure and available functions depend on the drive’s hardware and software revision. Commissioning personnel should use the correct instructions for the installed unit.

5.5 Integration with Industrial Controls

The drive can be integrated into a suitable machine-control system using its available control interfaces. However, this catalog configuration has no communication module installed.

If the existing machine relies on a fieldbus network, the communication requirement must be resolved before selecting the drive. A drive with the same current rating may still be unsuitable if the communication interface differs.

6. Product Applications

6.1 Conveyor and Material-Handling Systems

Conveyor systems often need adjustable speed to match production rates, transfer materials between workstations, or coordinate multiple sections of a production line.

A suitable AC drive can provide controlled acceleration and adjustable operating speed. When selecting a drive for a conveyor, check loaded-start requirements, belt inertia, starting torque, stopping distance, and the frequency of starts and stops.

6.2 Industrial Pumping Equipment

Pumps used in water circulation, industrial utilities, and process-fluid systems may need to deliver different flow rates according to demand.

Variable-speed control can help match pump output to the process where the pump is suitable for this operating method. Pump curves, minimum flow, pressure limits, and motor cooling must be checked before setting the operating range.

6.3 Fans and Ventilation Systems

Industrial fans, exhaust equipment, and ventilation systems may need different airflow levels depending on operating conditions.

A drive can adjust fan speed to match demand. The motor’s permitted speed range and cooling characteristics should be considered, particularly if the fan must run at low speed for extended periods.

6.4 Mixers and Agitators

Mixing equipment may experience changing torque as the material’s viscosity, density, or volume changes. Adjustable speed can help operators adapt the mixing process to different materials and production stages.

Applications with high starting torque, sticky materials, or frequent starts require particular attention to the drive’s current rating and overload capability.

6.5 Processing and Production Machinery

Rollers, feeders, production machines, and material-processing systems often require a stable and adjustable operating speed.

The drive can be considered for these applications when its electrical ratings, control arrangement, and overload capability match the machine’s requirements. The complete control-system design should be reviewed before installation.

These applications are examples of typical uses for industrial AC drives. They do not mean that every machine in each category is suitable for this particular model. Motor current, load torque, duty cycle, braking needs, and environmental conditions must be evaluated for the individual application.

7. Product Advantages

7.1 High-Current Motor Control

The 85 A output rating makes the model suitable for consideration in higher-power industrial motor applications. Its listed 45 kW rating provides a useful reference for selecting equipment in the corresponding power class.

The actual motor and load must still be checked against the drive’s current and duty ratings. A nominal power match alone does not guarantee compatibility.

7.2 Flexible Speed Regulation

Adjustable-speed operation allows a machine to follow changes in production demand rather than running continuously at a single fixed speed.

This can improve process flexibility and help coordinate the operation of equipment across a production line. In suitable pump and fan applications, reduced-speed operation may also lower energy consumption.

7.3 Smoother Starting and Stopping

Acceleration and deceleration ramps can reduce abrupt speed changes when the drive is configured correctly.

This can help limit mechanical shock on belts, couplings, gearboxes, shafts, and other moving components. The drive does not eliminate mechanical wear, and unsuitable ramp settings can create operating problems.

7.4 Local Operator Interface

The LCD display and full numeric keypad provide a convenient local interface for monitoring and parameter adjustment.

This can be useful during commissioning, fault investigation, and routine maintenance, particularly in installations where operators need access to drive status without relying entirely on an external control system.

7.5 Established Industrial Platform

The PowerFlex 700 family has been used in industrial motor-control systems for many years. Existing installations may already have established wiring diagrams, parameter records, and maintenance procedures for the platform.

This can simplify identification and maintenance planning. Because the product family is discontinued, long-term availability and the cost of future repairs should be considered.

7.6 Familiar Panel-Mounted Installation

The Frame 4 form factor provides a defined mounting arrangement for an appropriately designed control panel.

The cabinet must provide adequate ventilation, clearance, grounding, and electrical protection. Correct installation is essential to maintain reliable operation.

8. Limitations and Important Considerations

8.1 No Communication Module Installed

The specified configuration does not include a communication module. If the application relies on a network connection to a PLC or HMI, the required interface must be confirmed before the drive is ordered.

8.2 No Brake IGBT Installed

The drive is listed without an installed brake IGBT. If the load requires rapid deceleration or has substantial inertia, evaluate the braking requirements separately.

Do not assume that a braking resistor can be connected without checking the approved hardware, wiring arrangement, resistor rating, and thermal limits.

8.3 IP20 / NEMA Type 1 Protection

The drive is intended for a suitable electrical installation, not direct exposure to water, rain, or heavy contamination.

The control cabinet should protect the drive from unsuitable environmental conditions while providing the required cooling airflow.

8.4 Discontinued Product Family

The PowerFlex 700 family is a legacy product range. Before purchasing, consider the availability of the exact catalog configuration, repair options, and the feasibility of using a newer drive platform.

An engineered replacement may require changes to wiring, control logic, network configuration, parameter settings, or mounting arrangements.

9. Five Related Models in the Same Series

The following models are related PowerFlex 700 configurations or higher-current options. They are comparison candidates, not guaranteed replacements. Full catalog suffixes must be checked because options such as braking, communication, feedback, and control interfaces may differ.

Mechanical data note: The target model’s Frame 4 reference dimensions are approximately 220.0 × 758.8 × 201.7 mm, with a detailed mechanical reference weight of 24.49 kg. Dimensions and weights for other catalog numbers should be confirmed from their own mechanical drawings; the same frame or current class does not guarantee identical hardware.

9.1 Recommendations for Related Models

– 20BC085A3ANNANC0: The baseline choice when the application needs the specified 85 A, 400 V-class drive and its existing local keypad configuration.

– 20BC085A3ANNANA0: A related 85 A configuration worth comparing when the installation needs similar power capacity. Confirm the option suffix before substituting it.

– 20BC085A3ANNAND0: A related model for comparison with the target configuration. Check its complete hardware and control details before deciding whether it can serve as a replacement.

– 20BC105A3ANNANC0: A higher-current family candidate if the motor or load requires greater capacity. The exact current and power ratings must be confirmed.

– 20BC140A3ANNANC0: A higher-capacity candidate for applications requiring more current, subject to a complete electrical and mechanical assessment.

10. Five Other Popular Models from the Same Brand

The following table includes examples from other drive families. The compact PowerFlex 525 models serve much smaller current ranges than the target model. The PowerFlex 753 and 755 families may be relevant to modernization projects, but exact compatibility must be evaluated separately.

The PowerFlex 525 examples are not direct substitutes for the 85 A PowerFlex 700. They have substantially lower output-current ratings and are included only as examples of other models in the same brand’s drive portfolio.

The PowerFlex 753 and PowerFlex 755 examples are potential modernization candidates, not verified equivalent replacements. Confirm the complete catalog number, voltage class, current rating, braking hardware, control interface, communication options, dimensions, and weight before making a selection.

11. Comparison of the Product Families

12. Purchase, Installation, and Maintenance Checklist

12.1 Confirm the Motor Nameplate

Record the motor’s rated voltage, full-load current, frequency, power, and speed. Compare the motor’s current requirement with the drive’s rating under the intended operating duty.

12.2 Check the Application Duty

Determine whether the machine requires normal-duty or heavy-duty operation. Repeated starts, high starting torque, and frequent overloads may affect the required drive size.

12.3 Verify the Control Interface

Confirm the control signals, I/O voltage, speed reference, and PLC interface. Do not assume that two drives with similar catalog numbers have identical control hardware.

12.4 Confirm Communication Requirements

If the machine uses a fieldbus network, check the required protocol and installed communication module. The target model is listed without a communication module.

12.5 Evaluate Braking

Determine whether the load can stop using a normal deceleration ramp or needs a dedicated braking arrangement. Do not assume the target configuration includes a braking transistor.

12.6 Verify Dimensions and Weight

Use the exact mechanical drawing to confirm mounting-hole positions, overall dimensions, cable clearance, ventilation space, and service access. For shipping and lifting, distinguish net drive weight from packaged weight.

12.7 Review Electrical Protection

Select protective devices and conductors according to the applicable drive instructions and local electrical codes. Confirm grounding, isolation, and cabinet design before energizing the system.

12.8 Plan for Long-Term Availability

Because the PowerFlex 700 family is discontinued, compare repair, existing-stock replacement, and migration to a newer drive family. Include engineering work, commissioning, and downtime in the decision.

13. Overall Product Assessment

The 20BC085A3ANNANC0 is an 85 A PowerFlex 700 industrial AC drive in the 400 V class, with a listed power rating of 45 kW. It uses a Frame 4 enclosure arrangement with IP20 / NEMA Type 1 protection, an LCD display, and a full numeric keypad. The specified configuration has no communication module and no installed brake IGBT.

Its main advantages are adjustable motor-speed control, controlled acceleration and deceleration, and suitability for a range of industrial motor-driven applications. It can be considered for conveyors, pumps, fans, mixers, and production machinery when the motor and load match the drive’s ratings.

The most important selection checks are the motor’s full-load current, the required duty category, communication compatibility, braking needs, and physical installation requirements. The model’s discontinued status should also be considered when planning maintenance or a replacement.

For related models, begin with other 85 A PowerFlex 700 configurations if the aim is to maintain an existing installation. For modernization, evaluate newer drive families only after checking electrical ratings, control interfaces, braking provisions, mechanical dimensions, and commissioning requirements.