Allen Bradley 20BE077A0ANNANC0 PowerFlex 700 AC Drive

Applications for Industrial Motor Control

The 20BE077A0ANNANC0 is designed for industrial machinery where motor speed needs to be adjusted according to production requirements rather than operated continuously at a fixed speed.

Typical applications include:

• Industrial conveyor systems
• Material handling equipment
• Process pumps
• Cooling and ventilation fans
• Compressors
• Production and assembly machinery
• Paper and converting equipment
• Mining and bulk-material systems
• Industrial HVAC equipment
• Metal-processing machinery
• Machine tools
• General-purpose automated production equipment

With a continuous output rating of 77 A, the drive can control relatively large motors while providing programmable acceleration, deceleration, current limiting, and stopping functions.

The vector-control architecture provides better motor-speed regulation than basic scalar control in suitable applications. Since this catalog configuration does not include feedback, it is well suited to applications where sensorless vector control can meet the required speed and torque performance.

PowerFlex 700 Features and Practical Advantages

600 VAC three-phase power
The 20BE077A0ANNANC0 is designed for 600 VAC three-phase industrial power. It is rated for 75 HP under normal-duty operation and 60 HP under heavy-duty operation.

77 A output capability
The 77 A output rating provides substantial motor-control capacity for industrial machinery and process equipment.

Vector control with 24V I/O
This configuration uses vector control with 24V I/O, allowing the drive to provide flexible motor-control performance while interfacing with conventional industrial control signals.

Blank HIM configuration
The drive is supplied without a Human Interface Module and uses a blank plate. This arrangement is useful for installations where local operator keypad access is not required or where the drive is controlled through an external automation system.

No motor feedback option
The 20BE077A0ANNANC0 is configured without feedback. Sensorless vector control can therefore be used without installing an encoder on the motor.

No internal communication module
This configuration does not include an internal communication module. PLC integration can instead be implemented using the appropriate external control and communication architecture.

EMC filter and common-mode choke
The drive incorporates an EMC filter and common-mode choke to help manage electrical noise in industrial drive installations.

No brake IGBT or internal brake resistor
The drive does not include a brake IGBT or drive-mounted brake resistor. Applications requiring rapid deceleration or substantial regenerative-energy dissipation should be evaluated for an external braking solution.

Frame 5 construction
The Frame 5 design provides a balance between high-power capability and cabinet installation requirements, making it suitable for a variety of industrial control panels.

Conformal-coated construction
The configuration uses conformal coating, providing additional protection for the electronic assemblies in suitable industrial environments.

10 Technical FAQs

1. What is the input voltage of the 20BE077A0ANNANC0?
The drive is designed for 600 VAC, three-phase industrial power and belongs to the 500–690 VAC PowerFlex 700 voltage class.

2. What is the continuous output current?
The continuous output current rating is 77 A. The actual allowable overload current depends on the selected duty rating and operating conditions.

3. What is the horsepower rating of this drive?
The 20BE077A0ANNANC0 is rated for 75 HP under normal-duty operation and 60 HP under heavy-duty operation.

4. Does this PowerFlex 700 use vector control?
Yes. The model uses vector control with 24V I/O. This provides improved speed-control capability for applications where sensorless vector operation is appropriate.

5. Does the drive include encoder feedback?
No. This catalog configuration is supplied without a feedback option. If an application requires closed-loop encoder control, a different PowerFlex 700 configuration should be selected.

6. Does the drive include a Human Interface Module?
No. The model uses a blank HIM plate. Local configuration and monitoring therefore need to be handled through the available control and programming methods.

7. Is an internal braking resistor included?
No. The 20BE077A0ANNANC0 does not include a brake IGBT or drive-mounted brake resistor. An external braking arrangement may be required for applications with high regenerative energy.

8. Can the drive be integrated with a PLC?
Yes. PowerFlex 700 drives can be incorporated into PLC-based control systems through suitable I/O and communication arrangements. This particular configuration does not include an internal communication module.

9. What can cause an overcurrent fault during motor acceleration?
Possible causes include incorrect motor parameters, acceleration time that is too short, excessive mechanical load, incorrect motor wiring, motor faults, or unsuitable control settings. Motor nameplate data and acceleration parameters should be checked during commissioning.

10. What should be verified when replacing this PowerFlex 700?
The complete catalog number should be compared, including input-voltage class, output current, horsepower, I/O voltage, feedback, communication options, braking configuration, enclosure, and control method. Similar-looking PowerFlex 700 models may not be electrically interchangeable.