RDCU-12C ABB 3AUA0000036521 High-performance Extended Control Unit 24VDC 3P

1.Overview of the RDCU-12C ABB 3AUA0000036521

The ABB RDCU-12C (model 3AUA0000036521) is the core control board of the ABB ACS800 series frequency converters, also known as the control unit or drive board. As the "brain" of the frequency converter, it is responsible for data acquisition, processing, and multi-loop process control. It can achieve precise motor control from 0.75kW to 5000kW power range, supports one-to-one redundant peer-to-peer communication, is compatible with existing processors, and can be configured online.

I/O Interface Configuration
Analog Inputs: 3 differential inputs
1 ±0(2)-10V voltage input, 12-bit resolution
2 0(4)-20mA current inputs, 11-bit resolution
Analog Outputs: 2 0(4)-20mA current outputs, 10-bit resolution
Digital Inputs: 7 channels, 24V DC, with hardware filtering function
Digital Outputs: 3 relay outputs, supporting 24V DC or 115/230V AC, maximum continuous current 2A
Auxiliary Interfaces: +24V DC auxiliary power output (250mA), ±10V reference voltage output

Communication Capabilities
Standard Interfaces: RS-485 serial communication, CAN bus
Supported Protocols: Modbus RTU, CANopen
Network Connection: 1 RJ45 Ethernet interface (10/100Mbps, partial configuration)

Control and Monitoring Functions
Real-time acquisition of key parameters such as motor current, voltage, and temperature
Supports inverter start/stop control, speed control, and fault diagnosis
Features status monitoring and performance optimization functions

2.Core Features:

Product Model: RDCU-12C (Part Number 3AUA0000036521)

Series: ABB ACS800 Series Inverters

Rated Voltage: Three-phase AC380-400V

Analog Inputs: 3, supports differential and single-ended input, voltage range ±15V, current range 0(4)~20mA

Analog Outputs: 2, current range 0(4)~20mA

Digital Inputs: 7, input voltage 24V DC

Digital/Relay Outputs: 3, switchable contacts, supports 24V DC or 115/230V AC

Reference Voltage Output: ±10V ±0.5%, 10mA

Auxiliary Power Output: +24V ±10%, 250mA

Powerful Core Control: As the main control board of the frequency converter, the RDCU-12C can receive external control signals (such as PLC instructions) and generate PWM waveforms for driving the motor, supporting multiple control modes including speed, torque, and position.

Rich Programming Languages: Supports multiple control languages, including function codes, C language, Basic Batch90, ladder diagrams, etc., providing flexible programming capabilities.

Reliable Compatibility and Redundancy: Designed specifically for the ACS800 series, it can seamlessly replace older models such as the RDCU-02C. It supports one-to-one redundant peer-to-peer communication and provides a highly fault-tolerant redundant interface HNER, occupying only a single slot, compatible with existing processors, and configurable online.

Comprehensive Status Monitoring and Protection: Real-time monitoring of key parameters such as current, voltage, and temperature, with overload, short-circuit, and overheat protection functions, effectively improving system reliability.

Industrial Automation: Used for multi-axis synchronous control of CNC machine tools, packaging machinery, textile machinery, and other equipment to achieve high-precision machining.

Energy and Power: Applied to variable frequency speed control of equipment such as water pumps and fans, achieving energy efficiency of 20%-40%. Also suitable for high-power applications of ABB wind power inverters.

Special Equipment: Demonstrates reliable torque control in heavy machinery such as tunnel boring machines and cranes, supporting stable operation in harsh environments ranging from -25℃ to 60℃.

3.Product details pictures

4. Related products

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