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Help CenterABB NDCU-12C NDCU-12CK Main Control Unit (for Driving the CPU Motherboard)
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I. Product Description
This product is the dedicated main control unit (driver CPU motherboard) for ABB ACS800 multi-drive frequency converter. It is the core control center of the multi-drive rectifier and inverter system. NDCU-12C is the standard version, while NDCU-12CK is the version with coating for corrosion resistance and protection. It is mainly responsible for motor speed and torque closed-loop calculation, logic interlock, fault protection, IO signal acquisition, and communication interaction with the upper-level PLC and control panel, achieving synchronous control of multiple drive units. It is mainly used in industrial high-power multi-drive frequency converter systems. Currently, the original factory has discontinued production, and it belongs to common industrial spare parts.
Key Technical Parameters
Power supply specification: DC24V control power supply
Built-in I/O points: Multiple digital input, relay output, 4-20mA/0-10V analog output terminals
Communication interfaces: Fiber DriveBus, RS485, DP communication expansion slot, panel interface
Electrical isolation: 3000VAC isolation design for strong and weak electrical systems
Operating environment temperature: -10℃ to +50℃
Storage temperature: -25℃ to +70℃
Protection level: IP20 (installed in the control cabinet)
Installation method: Slot-type installation for multi-drive machine frames, supporting hot-swappable replacement
Version differences: NDCU-12CK has a three-proof coating, suitable for humid, corrosive dust working conditions; NDCU-12C is the ordinary commercial version
Status indicators: Power, fault, communication, operation LED indicators
Overall weight: Approximately 0.33kg
Certifications: CE, UL industrial safety certification
Product Performance
High-performance DSP processor, supporting vector control, direct torque DTC control, achieving high-precision speed regulation for asynchronous/synchronous motors
Supports high-speed synchronous networking of multiple drive units via fiber, synchronous start/stop of multiple motors, tension control, master-slave following control
Integrated full-dimensional hardware + software protection functions such as overcurrent, overvoltage, overload, phase loss, overheating, encoder failure, etc.
Can be expanded with various communication adapters such as Profibus-DP, Modbus, etc., easily connecting to DCS, PLC upper-level control systems
Supports parameter upload/download, fault record storage, motor identification, PID closed-loop process regulation functions
Three-proof coated version NDCU-12CK can resist humidity, salt spray, and corrosive gases, suitable for harsh working conditions in papermaking, chemical industry, and ports
Supports custom logic programming, enabling equipment interlock, timing control, fault alarm, etc., for on-site process logic
Application Domains
Paper industry: Paper machine main drive, rewinding machine, calendering machine multi-motor synchronous frequency control system
Metallurgical industry: Rolling production line, cold and hot rolling units, roller drive large-power multi-drive device
Port crane: Portal crane, container gantry crane traveling, lifting mechanism frequency drive
Textile and chemical fiber: Spinning, finishing machine, setting machine multi-motor tension synchronous control
Mining and cement: Belt conveyor, ball mill, elevator large-power frequency control system
Ships, wind power: Ship auxiliary machinery transmission, wind turbine pitch multi-drive speed regulation system
List of Similar Model Numbers
NDCU-12C: Standard multi-drive main control unit
NDCU-12CK: Three-proof coated anti-corrosion main control unit
RDCU-12C: ACS800 single-drive frequency converter main control board
NDCU-02: Early old model multi-drive control unit
NDCU-21: Upgraded high-performance multi-drive main control
RDCO series: Fiber communication expansion board card
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