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Allen-Bradley 20BC072A0AYNANC0 AC Variable Frequency Drive
Product Information for Allen-Bradley 20BC072A0AYNANC0
1. Overview
The 20BC072A0AYNANC0 is an AC variable frequency drive belonging to the PowerFlex 700 series by Rockwell Automation (Allen‑Bradley). It has a rated power of 50 HP (approximately 37 kW), a rated current of 72 A, and is suitable for 400 V three-phase power supply. This drive adopts a modular design, is compatible with the PowerFlex 400/700/800 software platform, and supports multiple communication protocols (such as EtherNet/IP, DeviceNet, Profibus). It enables high-speed and precise motor control as well as energy consumption optimization.
2. Specifications
| Parameter | Specification |
|---|---|
| Rated Power | 50 HP (≈ 37 kW) |
| Rated Voltage | 400 V AC, Three-phase |
| Rated Current | 72 A |
| Frame | Standard C, D, E frames; optional Filtered A/B frames |
| Control Method | V/Hz, Vector Control (FOC) |
| Communication Interface | EtherNet/IP, DeviceNet, Profibus, Modbus RTU |
| Display | Full-digital LCD, displaying real-time operating parameters and fault codes |
| Protection Functions | Overcurrent, overvoltage, undervoltage, overheating, short circuit, ground fault, etc. |
| Ambient Temperature Range | -20 °C ~ +50 °C (optional radiator installation available) |
| Dimensions | Approximately 200 mm × 150 mm × 120 mm (slightly different depending on frame model) |
3. Product Features
- Efficient IGBT Power Module: Adopts the latest IGBT technology to reduce power consumption and improve heat dissipation efficiency.
- Modular Structure: The drive body, control board, terminal block, and display panel can be replaced independently, facilitating maintenance.
- Full-Digital LCD Display: Provides real-time operating parameters, fault codes, and a setting interface, enabling intuitive on-site debugging.
- Multiple Protection Functions: Covers overcurrent, overvoltage, undervoltage, overheating, short circuit, etc., to enhance system reliability.
- Flexible Frame Options: Compatible with C, D, E frames; optional filtered/shielded frames to adapt to different noise environments.
- Compatibility with PowerFlex Software Platform: Can use the configuration tools and parameter libraries of PowerFlex 700/400/800, simplifying engineering design.
4. Structure and Composition
- Drive Body: Equipped with an IGBT power module and a heat dissipation system.
- Control Board: Built-in microprocessor, responsible for PWM generation, closed-loop control, and communication protocol stack.
- Terminal Block: Provides connection points for power supply, output, control signals, and communication interfaces.
- Display Panel (Optional): LCD screen displaying operating status, parameter settings, and fault information.
- Chassis/Frame: Metal frame compliant with IEC 60204‑1 standard, providing IP20 protection rating (higher protection rating optional).
5. Application Fields
- Industrial Production Lines: Speed and torque control of conveyors, rolling shutters, and packaging machinery.
- Pump Equipment: Soft start and energy-saving operation of centrifugal pumps and screw pumps.
- Fans and Blowers: Variable frequency speed regulation to achieve precise matching of air volume and energy consumption.
- Machining Centers and CNC Machine Tools: High-precision servo control to improve processing quality.
- Mining and Metallurgy: Reliable drive and remote monitoring of heavy-duty motors.
6. Installation and Maintenance
Installation
- Ensure the chassis is fixed in a cabinet or frame compliant with IEC 60204‑1.
- Complete the wiring of power supply, output, control, and communication terminals according to the wiring diagram, and ensure the phase sequence is correct.
- Connect the ground wire and check that the grounding resistance meets the specifications.
- Conduct a no-load inspection before startup to confirm there are no fault codes on the display screen.
Debugging
- Use PowerFlex configuration software (DriveExplorer/Studio 5000) to set parameters (such as motor rated power, acceleration/deceleration time, protection threshold).
- Monitor the operating curve through the LCD or upper computer, and fine-tune the PID parameters to obtain the optimal dynamic response.
Maintenance
- Regularly check whether the heat sink, fan, and air vent are blocked.
- Conduct on-site calibration once every 12 months, and check the insulation resistance of the IGBT module.
- Record fault codes and replace corresponding components with reference to the maintenance manual.
- Software upgrades are recommended to be completed during the shutdown maintenance window to ensure the firmware version is compatible with the on-site network.
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