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ABB NDCU-21C-02 Drive Control Unit  

1. Key Parameters

• Part Number: 42000652 (standard component identifier for procurement and replacement)
• Software Inclusion: No pre-installed software (requires separate ABB drive software for configuration and operation)
• Integrated Sub-Modules:
  • NMC (Motor Application Control Board): Core module for inverter control and motor parameter management
  • NIOC (Standard I/O Board): Interfaces with external sensors, actuators, and control signals
• Control Signal Transmission: Fiber-optic communication for control signal distribution (supports parallel inverter module configurations)
• Power Supply Source: Derived from the DC bus of the drive system (eliminates the need for an independent external power supply)
• Control Technology: Compatible with ABB’s Direct Torque Control (DTC) technology
• Operating Temperature Range: -10℃~+50℃ (ambient temperature, without additional cooling)
• Storage Temperature Range: -40℃~+85℃
• Protection Features: Overvoltage protection, undervoltage protection, overcurrent protection, thermal overload protection
• Mounting Method: Chassis mounting (compatible with ABB standard drive enclosures)
• Protection Class: IP20 (when installed within a drive cabinet); Complies with IEC 61800-5-1 (safety requirements for adjustable speed electrical power drive systems)

2. Product Features

• Core Drive Control: Acts as the "brain" of the inverter, overseeing motor start/stop, speed regulation, and torque control—ensuring smooth and responsive motor operation.
• DTC Technology Compatibility: Supports ABB’s proprietary Direct Torque Control (DTC) technology, which directly regulates motor flux and torque (no indirect current control required). This enables:
  • Precise torque and speed control at low speeds
  • Full starting torque at zero speed
  • Fast dynamic response to load changes
• Modular Design: Integrates NMC and NIOC sub-modules for clear functional division—simplifying maintenance, troubleshooting, and component replacement.
• Parallel Inverter Support: Uses fiber-optic communication to distribute control signals to parallel inverter modules, enabling scalable drive configurations for high-power motor applications.
• Seamless System Integration: Interfaces with ABB’s drive software (e.g., Drive composer) for parameter configuration, real-time monitoring, and fault diagnostics—facilitating easy setup and maintenance.
• Robust Protection Mechanisms: Built-in overvoltage, undervoltage, overcurrent, and thermal protection safeguards the drive unit, motor, and connected equipment from damage caused by abnormal operating conditions.

3. Application Fields

• Heavy Industry: Used in steel mills, mining equipment, and cement plants to control high-power motors for conveyors, crushers, and grinding mills—ensuring reliable operation under heavy loads.
• Manufacturing Automation: Regulates motors for machine tools, robotic arms, and production line conveyors in automotive, electronics, and packaging facilities—enabling precise speed and torque control for process consistency.
• Power Generation: Controls auxiliary motors in thermal power plants, wind farms, and hydroelectric facilities (e.g., pump motors, fan motors)—supporting efficient power generation and system stability.
• Marine & Offshore: Integrated into marine drive systems for ship propulsion, winches, and cargo handling equipment—withstanding harsh marine environments and ensuring reliable operation.
• Infrastructure: Manages motors for water treatment pumps, HVAC systems in large buildings, and urban transit systems (e.g., metro escalators)—optimizing energy efficiency and operational reliability.

4. Precautions

• Software Requirement: Since the unit does not include pre-installed software, ensure compatibility with ABB’s dedicated drive software (e.g., Drive composer) before configuration—incorrect software may cause control failures.
• Power Supply Dependence: Verify that the DC bus voltage of the drive system matches the unit’s requirements; unstable DC bus voltage can lead to erratic control or component damage.
• Fiber-Optic Connection: When configuring parallel inverter modules, use ABB-approved fiber-optic cables for control signal transmission—poor-quality cables or incorrect wiring will disrupt communication.
• Environmental Limits: Avoid operating the unit outside the specified temperature range (-10℃~+50℃); use forced air cooling in high-temperature environments to prevent thermal overload.
• Maintenance Safety: Before servicing or replacing the unit, disconnect the drive system from the power supply and discharge the DC bus to eliminate electric shock hazards.
• Calibration & Testing: After installation or replacement, perform parameter calibration and functional testing using ABB’s drive software to ensure alignment with motor specifications and application requirements.

The structure and details of the product：

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