Allen Bradley 20BD156A3ANNAND0 PowerFlex 700 AC Drive

Applications and Industrial Motor Control

The Allen-Bradley 20BD156A3ANNAND0 is a PowerFlex 700 AC drive designed for demanding industrial motor-control applications. This model is a 480 VAC, three-phase drive with a 156 A output rating and a 125 HP normal-duty power rating. It uses vector control with 120 VAC I/O and is built in a Size 6 frame with an IP20/NEMA Type 1 enclosure configuration.

The drive is intended for applications where controlled acceleration, deceleration, motor speed regulation, and reliable variable-frequency operation are required. Its PowerFlex 700 architecture makes it suitable for larger industrial machines and process equipment where a conventional low-power VFD is not sufficient.

Typical applications include:

• Industrial conveyor systems
• Pumps and fans
• Compressors
• Material-handling machinery
• Machine tools
• Extrusion equipment
• Process machinery
• Industrial production lines
• Heavy-duty motor control
• Large AC motor speed-control systems
• Replacement and maintenance of existing PowerFlex 700 installations

The 20BD156A3ANNAND0 is equipped with an LCD display and full numeric keypad, allowing technicians to access drive parameters and operating information locally during commissioning and maintenance.

Key Advantages for Industrial Drive Applications

High-current motor control
With a 156 A output rating and 125 HP normal-duty rating, the drive is designed for substantially larger industrial motors than compact PowerFlex drives.

480 VAC three-phase input
The 480 VAC three-phase configuration makes it suitable for common industrial power systems used in North American and international manufacturing facilities.

Vector control with 120 VAC I/O
The drive uses vector control and 120 VAC I/O, providing a flexible control architecture for industrial machinery requiring more than basic frequency control.

Integrated operator interface
The LCD display and full numeric keypad allow technicians to monitor operating information and adjust drive parameters directly at the drive.

EMC filtering and common-mode choke
This configuration includes the applicable second-environment EMC filtering and common-mode-choke arrangement, supporting integration into industrial electrical systems where electromagnetic compatibility is an important consideration.

Conformal-coated construction
The specified IP20/Type 1 drive configuration includes conformal coating, providing additional protection for the electronics in suitable industrial environments.

PowerFlex 700 architecture
The PowerFlex 700 family was developed for industrial applications requiring scalable motor control, configuration flexibility, and integration with broader Allen-Bradley automation systems.

Technical FAQs

1. What is the Allen-Bradley 20BD156A3ANNAND0?
It is a PowerFlex 700 adjustable-frequency AC drive, Type 20B, rated for 480 VAC three-phase input and 156 A output. The drive is configured for vector control with 120 VAC I/O.

2. What motor power can the 20BD156A3ANNAND0 handle?
The model is rated at 125 HP for normal-duty operation and 100 HP for heavy-duty operation. Actual motor selection must also consider load characteristics, ambient conditions, duty cycle, and the drive's configured overload requirements.

3. What is the output current rating?
The drive has a continuous output-current rating of 156 A. The associated drive configuration provides higher short-duration current capability for acceleration and transient load requirements.

4. Does this model include a communication module?
The standard configuration of 20BD156A3ANNAND0 is specified without an internal communication module. Communication requirements should therefore be evaluated against the installed option hardware and the overall control-system architecture.

5. Does the 20BD156A3ANNAND0 include an internal brake IGBT?
No. This specific catalog configuration is specified without a brake IGBT and without a drive-mounted internal brake resistor. If dynamic braking is required, the braking architecture must be evaluated separately.

6. Does this drive have encoder feedback installed?
The standard configuration is specified without a feedback option. If closed-loop motor control is required, the appropriate feedback hardware and system configuration must be verified before installation.

7. What type of enclosure does the drive use?
The 20BD156A3ANNAND0 is specified as IP20 / NEMA Type 1 with conformal coating. It should be installed inside an appropriate electrical enclosure when the application requires additional environmental protection.

8. What should be checked before replacing an existing PowerFlex 700 drive?
Verify the complete catalog number, input voltage, output current, motor horsepower, frame size, control type, I/O configuration, feedback requirements, braking configuration, communication options, and existing parameter settings. Matching only the PowerFlex family is not sufficient.

9. What can cause an overcurrent fault during commissioning?
Possible causes include incorrect motor data, excessive acceleration demand, mechanical overload, incorrect motor wiring, unsuitable current-limit settings, or a motor that is not properly matched to the drive. Mechanical and electrical conditions should be checked before repeatedly resetting the fault.

10. Is the 20BD156A3ANNAND0 still available as a new manufacturer product?
The PowerFlex 700 20B product family has been discontinued by Rockwell Automation. Therefore, when sourcing this model today, buyers should carefully verify the condition, series/revision, authenticity, and technical compatibility of available inventory.