Drive Overview

The Allen-Bradley 20BP140A0ANNANC0 PowerFlex 700 AC Drive is built for industrial applications where motor power, controllability, and long-term system integration are important considerations.

At the heart of the configuration is its 140 A output rating. This gives the drive enough capacity for larger industrial motors while retaining the flexible parameter structure and control functions of the PowerFlex 700 family.

The model operates from a 540 VDC pre-charge input. Because it is a DC-input configuration, the overall system design needs to account for the DC source, pre-charge circuit, disconnecting means, protective devices, grounding, and DC-bus safety procedures.

The drive uses vector control with 24 V DC I/O. One of its strengths is the ability to provide sensorless vector control without requiring an encoder. For many industrial applications, this offers an attractive balance between control performance and installation simplicity.

Sensorless vector operation is especially useful for applications where the motor must maintain reasonably stable speed while the load changes. Proper motor data entry and tuning are important because the quality of vector control depends heavily on accurate motor parameters.

The drive can achieve approximately 0.1% speed regulation across a 120:1 operating range in vector-control mode without feedback. This makes it a strong option for many conveyors, pumps, fans, mixers, and process machines that do not require true closed-loop positioning.

The 20BP140A0ANNANC0 also provides programmable acceleration and deceleration functions. Two separate acceleration and deceleration values can be configured, allowing the engineer to establish different operating profiles depending on the machine state or process requirement.

The drive provides 110% overload capability for up to one minute and 150% overload capability for up to three seconds. These capabilities should be considered alongside the actual motor load, ambient temperature, duty cycle, and application requirements when selecting the drive.

An EMC filter with common-mode choke is included in this configuration. This helps manage electromagnetic interference, but proper installation remains essential. Shielding, grounding, motor-cable routing, cabinet layout, and separation of control and power wiring all contribute to overall EMC performance.

The drive does not contain an internal brake resistor or brake IGBT. If the connected load has substantial regenerative energy during deceleration, an external braking or regenerative arrangement may be required.

The PowerFlex 700 20B family was discontinued on November 30, 2023. The 20BP140A0ANNANC0 therefore remains particularly relevant for existing-system maintenance, replacement, retrofit, repair, and spare-parts applications. When sourcing a replacement, matching the complete catalog number is important because similarly rated PowerFlex models can have different input, feedback, braking, communication, and control configurations.

Technical Specifications

Specification	Details
Brand	Allen-Bradley
Manufacturer	Rockwell Automation
Product Family	PowerFlex 700
Series	PowerFlex 700 20B
Model	20BP140A0ANNANC0
Product Type	AC Drive / Variable Frequency Drive
Lifecycle	Discontinued
Input Voltage	540 VDC
Input Configuration	DC Input with Pre-Charge
Input Phases	3-phase
Output Phases	3-phase
Output Current Rating	140 A
Normal-Duty Rating	75 kW
Heavy-Duty Rating	55 kW
Frame Size	Frame 5
Control Method	Vector Control with 24 V DC I/O
Motor Control	Sensorless Vector / V/Hz / Vector Control
Feedback	None
Encoder	Not Included
HIM	No HIM / Blank Plate
Communication Module	None
Brake IGBT	None
Internal Brake Resistor	None
EMC Filtering	EMC Filter with Common-Mode Choke
Conformal Coating	Yes
Enclosure	IP20 / NEMA/UL Type 1
Analog Inputs	2
Analog Outputs	2
Digital Inputs	6
Digital Outputs	3
Maximum Output Frequency	420 Hz
Carrier Frequency	2, 4, 8, and 10 kHz
Overload Capability	110% for 1 minute / 150% for 3 seconds
Acceleration Time	0–3600 s
Deceleration Time	0–3600 s
Current Limit	Programmable from 20–160% of rated output current
Speed Regulation	Approximately 0.1% of base speed in vector mode without feedback
Frequency Accuracy	±0.01% with digital frequency reference
Efficiency	Approximately 97.5% at rated current
Displacement Power Factor	Approximately 0.98
Short-Circuit Rating	Up to 200,000 A symmetrical, subject to installation conditions
Maximum Altitude Without Derating	1000 m
Degree of Protection	IP20
Dimensions	689.6 × 308.9 × 275.4 mm
Weight	37.19 kg (81.99 lb)

Recommended Related Models

Allen-Bradley 20BP105A0ANNANC0 — PowerFlex 700 AC Drive, 105 A, 540 VDC, no feedback
Allen-Bradley 20BP105A0ANNANC1 — PowerFlex 700 AC Drive, 105 A, 540 VDC, standard encoder
Allen-Bradley 20BP140A0ANNANC1 — PowerFlex 700 AC Drive, 140 A, 540 VDC, standard encoder
Allen-Bradley 20BP170A0ANNANC0 — PowerFlex 700 AC Drive, 170 A, 540 VDC
Allen-Bradley 20BP125A0AYNANC0 — PowerFlex 700 AC Drive, 125 A class DC-input configuration
Allen-Bradley 20BC140A0ANNANC0 — PowerFlex 700 AC Drive, 140 A, 400 VAC configuration
Allen-Bradley 20BH140A0ANNANC0 — PowerFlex 700 AC Drive, 140 A class configuration

For replacement applications, compare the complete catalog number carefully. A drive with the same current rating may still have a different input voltage, feedback arrangement, control interface, braking configuration, or communications option.

Popular Related Models

Allen-Bradley 20BP105A0ANNANC0
A lower-current 540 VDC PowerFlex 700 configuration rated at 105 A. It is a useful alternative when the connected motor requires less current while retaining the same general DC-input architecture.

Allen-Bradley 20BP105A0ANNANC1
A 105 A configuration with standard encoder feedback. It is a particularly useful comparison when an application needs closed-loop speed feedback rather than the sensorless configuration of the 20BP140A0ANNANC0.

Allen-Bradley 20BP140A0ANNANC1
A 140 A version with standard encoder feedback. It provides the same general power class while adding incremental encoder capability for applications requiring tighter speed regulation.

Allen-Bradley 20BP170A0ANNANC0
A higher-current 540 VDC PowerFlex 700 configuration for applications that exceed the 140 A requirement.

Allen-Bradley 20BC140A0ANNANC0
A related 140 A PowerFlex 700 configuration designed for a different input-voltage class. It can be considered when comparing DC-input and AC-input PowerFlex configurations.

Allen-Bradley 20BH140A0ANNANC0
Another 140 A PowerFlex 700 configuration useful for comparing different 20B input arrangements and system architectures.

Allen-Bradley 20BP140A0ANNANC0
The exact model covered on this page, combining 140 A output, 540 VDC pre-charge input, 75 kW normal-duty capacity, 55 kW heavy-duty capacity, vector control with 24 V DC I/O, no feedback, EMC filtering, and conformal-coated electronics in a Frame 5 PowerFlex 700 drive.

Applications

The 20BP140A0ANNANC0 is well suited to industrial machinery where a high-current variable-speed drive is required but encoder feedback is not essential.

Common applications include:

Heavy-duty conveyor systems
Industrial pumps
Large fans and blowers
Compressors
Mixers and agitators
Material handling machinery
Paper and pulp equipment
Metal-processing machinery
Chemical processing systems
Industrial production lines
Water and wastewater equipment
Extrusion machinery
Process-control equipment
High-inertia rotating equipment
General industrial machinery

Its 140 A output capability provides considerable headroom for larger motors and demanding process loads. Sensorless vector control can provide reliable speed regulation without requiring a physical encoder, simplifying installations where closed-loop feedback is unnecessary.

For conveyors, pumps, fans, and similar equipment, the drive's adjustable acceleration and deceleration profiles can be used to tailor motor behavior to the mechanical characteristics of the machine.

Advantages

140 A high-current output

The drive provides a 140 A output rating, giving it the capacity required by many large industrial motors and process machines.

75 kW normal-duty capacity

With a 75 kW normal-duty rating, the drive is suitable for substantial continuous-duty motor applications.

55 kW heavy-duty rating

The 55 kW heavy-duty rating provides a suitable operating point for applications with higher overload demands.

540 VDC pre-charge architecture

The DC-input configuration is designed around a 540 VDC pre-charge supply, making the drive suitable for DC-bus-based power systems.

Sensorless vector control

Sensorless vector control provides improved speed and torque regulation without requiring an encoder. This can reduce installation complexity while maintaining strong motor-control performance.

24 V DC I/O

The 24 V DC I/O architecture integrates conveniently with industrial PLC systems and machine-control circuits.

High-speed regulation without feedback

In vector-control mode without feedback, the drive can achieve approximately 0.1% of base-speed regulation across a 120:1 speed range, subject to proper motor tuning and application conditions.

EMC filtering

The integrated EMC filter with common-mode choke helps control conducted interference and supports cleaner operation when appropriate grounding and wiring practices are used.

Conformal-coated electronics

Conformal coating provides additional protection for electronic components and is useful for suitable industrial environments.

Flexible acceleration and deceleration

Two independently programmable acceleration and deceleration times can each be configured from 0 to 3600 seconds, allowing precise control of machine starting and stopping behavior.

Technical FAQs

1. What is the output current rating of the 20BP140A0ANNANC0?

The drive has a rated output current of 140 A.

2. What are the normal-duty and heavy-duty power ratings?

The 20BP140A0ANNANC0 is rated at 75 kW for normal-duty operation and 55 kW for heavy-duty operation.

3. What input voltage is required?

This configuration uses a 540 VDC input with pre-charge. The DC supply and pre-charge arrangement must be properly designed for the drive.

4. Does this model require an encoder for vector control?

No. The 20BP140A0ANNANC0 is configured without feedback and can operate using sensorless vector control with motor tuning.

5. What speed regulation can be achieved without encoder feedback?

In vector-control mode without feedback, the PowerFlex 700 can provide approximately 0.1% of base-speed regulation across a 120:1 speed range, provided the motor is correctly configured and tuned.

6. What motor-control methods are available?

The drive supports sensorless vector control with full tuning, V/Hz control with customization, and vector control.

7. Does the 20BP140A0ANNANC0 include a brake IGBT?

No. This catalog configuration is supplied without a brake IGBT.

8. Is there an internal braking resistor?

No. The drive has no internal brake resistor. Applications with significant regenerative energy should be evaluated for a suitable external braking or regenerative solution.

9. What acceleration and deceleration settings are available?

The drive provides two independently programmable acceleration and deceleration times. Each can be set from 0 to 3600 seconds in 0.1-second increments.

10. What encoder options are available on this configuration?

The 20BP140A0ANNANC0 itself is configured without feedback. The broader PowerFlex 700 platform supports compatible incremental encoder interfaces on configurations equipped with the appropriate feedback option.

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