Allen-Bradley 20BC170A0ANNANC0 AC Drive — Product Overview and Technical Specifications

1. Product Identification

The 20BC170A0ANNANC0 is an industrial variable-frequency AC drive from the PowerFlex 700 series. It is designed to control the speed and torque of three-phase AC motors in industrial machinery, production equipment, and material-handling systems.

Its main characteristics include a 400 V-class supply, a rated output current of 170 A, and power ratings of 90 kW for normal-duty applications and 75 kW for heavy-duty applications. This configuration uses vector control with 24 V I/O, has no feedback option, and does not include an internal braking resistor or a built-in braking IGBT.

The model is intended for installations where dependable motor-speed regulation, adjustable acceleration and deceleration, and integration with industrial control equipment are important.

2. Detailed Technical Parameters

2.1 Electrical and Power Specifications

The drive is built for three-phase industrial power systems in the 400 V class. Its 170 A output-current rating makes it suitable for relatively high-power motor applications, including large pumps, fans, conveyors, and selected processing machines.

The normal-duty rating is 90 kW, while the heavy-duty rating is 75 kW. These ratings represent different operating requirements rather than interchangeable figures: heavy-duty operation generally allows for greater overload demands, making it important to select the rating according to the motor load and its starting and operating conditions.

2.2 Control and I/O Specifications

The 20BC170A0ANNANC0 uses vector control and a 24 V I/O configuration. This allows the drive to respond to run commands, stop commands, interlocks, and other control signals supplied by a compatible automation system.

The exact control performance depends on motor data, drive configuration, parameter settings, and the selected control mode. Since this model has no motor-feedback option, applications requiring an encoder-based closed-loop speed or position-control arrangement should be assessed carefully before installation.

The model designation indicates that a separate internal communication module is not included. This should not be interpreted as proof that every communication method is unavailable: communication capability can depend on supported adapters, installed options, and the overall control architecture. Confirm the exact hardware and firmware combination before planning network integration.

2.3 Environmental and Protection Parameters

This configuration uses an IP20 / NEMA Type 1 enclosure classification. It is intended for an appropriately protected industrial electrical installation, such as a suitable control cabinet or electrical room, rather than direct exposure to rain, washdown, or conductive dust.

Ambient temperature, mounting orientation, cabinet ventilation, altitude, and the condition of the cooling system can all affect reliable operation. The final installation should follow the specific technical documentation for the drive and its frame.

2.4 Dimensions and Weight

The physical size and weight are especially important for a drive in this power class. The equipment needs a suitable mounting structure, adequate lifting arrangements, and enough space for power cables, control wiring, cooling airflow, and maintenance access.

The available dimensional drawing associated with this model family indicates a large Frame 7 construction. Because enclosure and junction-box configurations can change the final dimensions, the figures below should be treated as preliminary planning values and checked against the exact unit before cabinet fabrication or replacement work.

Important: The dimensional drawing and the product listing may describe different frame or enclosure arrangements. Before ordering a replacement, confirm the nameplate, frame, enclosure, and terminal-box arrangement. Do not rely on approximate dimensions alone when planning a direct mechanical replacement.

3. Product Introduction

The Allen-Bradley 20BC170A0ANNANC0 is a high-power industrial AC drive designed to regulate the speed of compatible three-phase AC motors. Rather than running a motor continuously at a fixed supply frequency, the drive varies the electrical output frequency and voltage to control motor operation according to the process requirement.

This type of control is useful where equipment must start smoothly, change speed during production, or adjust its output in response to changing loads. For example, a conveyor may need to accelerate gradually when starting a production line, while a pump may need to operate at different speeds as system demand changes.

The PowerFlex 700 family was developed for industrial motor-control applications requiring configurable operation and integration into larger machinery systems. The 20BC170A0ANNANC0 configuration combines a 400 V-class supply with a 170 A output-current rating, making it relevant to installations with substantial motor-power requirements.

Its vector-control arrangement supports controlled motor operation when correctly configured for the connected motor and application. The drive’s actual torque response, low-speed performance, and speed regulation depend on the selected control mode, motor data, commissioning procedure, and operating conditions.

This model is supplied without an internal braking resistor or braking IGBT. Applications involving rapid deceleration, frequent stopping, or significant regenerative energy may therefore require an engineered external braking solution or a different drive configuration. The required solution depends on the motor, load inertia, duty cycle, and stopping-time requirements.

The unit also has no feedback option. It should not automatically be selected for applications that require encoder-based closed-loop control without first confirming that the required feedback functionality can be provided through a supported configuration.

The product is discontinued, so procurement may involve existing inventory, specialist repair channels, or replacement planning. When evaluating a used or refurbished unit, the complete catalog number, hardware condition, firmware, previous service history, and compatibility with the existing installation should all be checked.

4. Main Applications

4.1 Conveyor and Material-Handling Systems

The drive can be used in suitable conveyor systems where motor speed needs to be adjusted to match production rates or material flow. Controlled acceleration can reduce sudden mechanical loading on belts, couplings, gearboxes, and driven equipment.

Typical examples include:

• Production-line conveyors.

• Bulk-material handling equipment.

• Transfer conveyors.

• Packaging and sorting lines.

• Industrial handling machinery.

For conveyor systems with frequent starts and stops, the braking requirements should be reviewed separately. The absence of built-in braking hardware may affect the choice of deceleration strategy.

4.2 Pumps and Fluid-Handling Equipment

In compatible pump applications, adjustable motor speed can help match flow to process demand. This can reduce the need for continuous throttling and may lower energy consumption when the process permits operation at reduced speed.

Potential applications include:

• Industrial water circulation.

• Process-fluid transfer.

• Cooling-water systems.

• General-purpose pumping installations.

• Selected treatment and distribution processes.

The drive must be matched to the pump motor and its load characteristics. Minimum-speed limits, cooling requirements, cavitation risk, and the pump’s permissible operating range should be considered during commissioning.

4.3 Fans and Ventilation Equipment

Fans used in industrial ventilation, air circulation, and process exhaust systems may benefit from variable-speed control. When airflow demand changes, adjusting motor speed can provide a more flexible operating arrangement than running continuously at full speed.

Potential applications include:

• Industrial ventilation fans.

• Process exhaust systems.

• Air-circulation equipment.

• Selected cooling fans.

• Large fan-driven process systems.

The required motor current, fan inertia, operating temperature, and acceleration profile should be assessed before selecting the drive.

4.4 Industrial Processing Machinery

The drive may also suit selected processing machines that require adjustable speed and controlled motor operation. The exact suitability depends on the motor, load profile, process precision, and required overload performance.

Examples include:

• Mixers and agitators.

• Material-processing equipment.

• Selected industrial machinery.

• Auxiliary drives in production systems.

• Machinery requiring variable motor speed.

Where the machine requires very accurate position control, encoder feedback, or a dedicated servo-control system, a different control arrangement may be more appropriate.

4.5 Large Mechanical Drives

With its 170 A output-current rating, this model is intended for larger motor-control duties than many compact general-purpose drives. It may be considered for compatible mechanical systems with substantial continuous power requirements, provided the motor and operating duty fall within the drive’s ratings.

The final selection should account for the motor’s rated current, overload demand, load inertia, environmental conditions, and any braking or feedback requirements. The power rating alone is not sufficient to establish compatibility.

5. Product Advantages

5.1 High Output-Current Capacity

The 170 A rating makes the drive suitable for a range of high-power industrial motor applications. This provides an option for equipment where a smaller drive would not offer adequate current capacity.

The 90 kW normal-duty and 75 kW heavy-duty ratings also help distinguish the intended operating classes. Correct selection between them is essential for reliable operation under the actual load profile.

5.2 Adjustable Motor Speed

Variable-frequency operation allows the motor speed to be adjusted to suit the process. Depending on the application, this can improve operating flexibility and reduce the need for mechanical speed-control methods.

A suitable speed profile can also help reduce unnecessary mechanical stress during startup and speed changes.

5.3 Vector-Control Capability

Vector control provides a more sophisticated motor-control approach than simple frequency adjustment alone. When properly configured, it can improve motor response and torque control for compatible applications.

The performance achieved in practice depends on the motor data, control settings, operating speed, and whether the application needs open-loop or closed-loop feedback.

5.4 Integration with Industrial Control Systems

The 24 V I/O configuration supports connection to compatible control circuits. This can make the drive suitable for machinery in which start, stop, enable, fault, and process-control signals are managed by a PLC or other industrial controller.

The actual interface design should be checked against the installed hardware, control terminals, supported options, and the automation system’s requirements.

5.5 Potential Energy Savings

In suitable variable-torque applications, particularly pumps and fans, reducing motor speed can lower energy use when process demand is below maximum capacity.

The amount of energy saved depends on the equipment, operating hours, load profile, and control strategy. It should be assessed against the existing system rather than assumed from the drive rating alone.

5.6 Configurable Industrial Installation

The PowerFlex 700 platform provides a family of drive configurations for different current ratings, control arrangements, and installation needs. This can be useful when maintaining equipment built around the same drive family.

However, similar catalog numbers do not guarantee direct interchangeability. Differences in I/O, braking, feedback, enclosure, communication options, and firmware must be checked before substitution.

5.7 Suitability for Existing Equipment

For a machine already designed around this specific drive, retaining the same catalog number may reduce the amount of mechanical and electrical redesign required. This is particularly relevant when the existing control panel, wiring, and motor parameters were configured for the original unit.

Because the model is discontinued, it is also sensible to prepare a replacement plan and identify a compatible current alternative rather than waiting for a failure before reviewing options.

6. Important Selection and Installation Considerations

Before installing or replacing the 20BC170A0ANNANC0, confirm the following points:

1. Motor compatibility: Check the motor nameplate voltage, current, rated frequency, power, and insulation suitability.

2. Duty rating: Use the normal-duty or heavy-duty rating that matches the real load and overload requirements.

3. Braking: This configuration does not include an internal braking resistor or braking IGBT. Review the deceleration profile and any need for external braking equipment.

4. Feedback requirements: The model has no feedback option. Confirm whether the application can operate without encoder-based feedback.

5. Communication: The catalog configuration does not include a separate internal communication module. Confirm the necessary network and adapter options.

6. Cooling and enclosure: Provide the required airflow, cabinet space, and environmental protection. IP20 / NEMA Type 1 does not mean the drive is suitable for direct washdown or outdoor exposure.

7. Mechanical dimensions: Verify the actual frame and enclosure drawing before planning a direct replacement.

8. Product condition: For used or refurbished equipment, inspect the cooling fans, capacitors, terminals, control boards, and fault history where possible.

9. Commissioning: Configure the motor data, acceleration and deceleration ramps, current limits, protection settings, and command sources before putting the equipment into service.

10. Replacement planning: Since this model is discontinued, assess the cost and availability of repair against the cost, compatibility, and engineering work involved in upgrading to another drive.

7. Five Related Models from the PowerFlex 700 Series

The following models are related to the 20BC170A0ANNANC0. Some share the same 170 A power class but differ in control I/O, enclosure, or installation configuration. Others provide a lower current rating for applications with less demanding power requirements.

The model suffix is important: a small change in the catalog number can represent a meaningful difference in the drive’s configuration. The comparison below is intended for initial selection, not as confirmation that one model can replace another without engineering checks.

How to Choose Among These Models

– For a like-for-like replacement: Start with the same complete catalog number, then compare the nameplate, frame, enclosure, control terminals, and hardware revision.

– For a 170 A alternative: The other 20BC170 variants may be relevant, but check their exact I/O and option codes. Do not assume the suffixes are interchangeable.

– For a different enclosure: The 20BC170A0AYNANA0 may be worth evaluating when the installation requires a different enclosure arrangement. Its dimensions and weight can be substantially different from those of a standard drive.

– For a smaller motor: The 20BC140A0ANNANA0 may be a candidate if the motor current and overload demand fit its lower rating.

– For cabinet design: Treat dimensions marked for verification as unconfirmed rather than using them for final panel fabrication. Confirm the exact product drawing and mounting clearances first.

8. Five Popular Allen-Bradley Drive Models

The models below cover several widely used drive families for industrial motor control. They are not all direct substitutes for a 170 A PowerFlex 700. Their suitability depends on the motor’s current, load duty, required control performance, communication interface, and installation environment.

Notes on the Popular Models

PowerFlex 525 — 25B-D017N104 and 25B-D024N104

The PowerFlex 525 family is generally used for compact, general-purpose motor-control applications. These models are worth considering when the motor rating is substantially lower than the 170 A capacity of the target drive. They are not direct replacements for a high-power PowerFlex 700 without a full electrical and mechanical redesign.

PowerFlex 40 — 22B-D017N104

The PowerFlex 40 family is associated with general-purpose variable-speed control. It may be appropriate for smaller machinery, but its current capacity and control capabilities must be compared against the actual motor and process requirements.

PowerFlex 753 — 20F11NC015JA0NNNNN

The PowerFlex 753 family is intended for more demanding industrial applications with configurable drive options. Before considering this catalog number, confirm its exact voltage class, output current, enclosure, and option configuration. A shared industrial application does not automatically make it an equivalent replacement.

PowerFlex 755 — 20G11NC022JA0NNNNN

The PowerFlex 755 family provides options for more advanced industrial motor-control systems. It may be relevant for an upgrade project where control functionality, integration requirements, and lifecycle planning are being reconsidered. Exact suitability depends on the full catalog configuration and system design.

Dimension and weight note: The table deliberately marks dimensions and weights that have not been reliably confirmed for the complete catalog number. Frame size, voltage class, enclosure, and installed options can change the final measurements. Obtain the exact dimensional drawing before using a candidate model for a replacement installation.

9. Summary and Recommendation

The Allen-Bradley 20BC170A0ANNANC0 is a 400 V-class PowerFlex 700 AC drive with a 170 A output-current rating, a 90 kW normal-duty rating, and a 75 kW heavy-duty rating. It uses vector control with 24 V I/O and is intended for compatible industrial three-phase AC motors.

Its main strengths are its high output-current capacity, adjustable motor speed, vector-control capability, and suitability for larger industrial machinery. Important limitations include the absence of an internal braking resistor, the absence of a built-in braking IGBT, the lack of a feedback option, and the need to verify communication and enclosure requirements.

For a replacement project, the safest first choice is to identify an exact match for the existing catalog number and confirm its condition and compatibility. If an exact match is unavailable, compare the related PowerFlex 700 configurations before considering a newer drive family. Any upgrade should be based on the motor nameplate, load profile, braking needs, control-system interfaces, enclosure, physical dimensions, and commissioning requirements.

Because this model is discontinued, it is sensible to plan for long-term support and replacement rather than evaluating the purchase price alone. A suitable replacement should meet the electrical and mechanical requirements of the application while also providing the control functions needed for reliable operation.