ABB UAA326A02 (Order No.: HIEE300024R2) is a high-performance programmable control motherboard and signal processing module designed for industrial automation and power control applications. As a core component of the ABB UNITROL 6000 excitation system and the HIEE3000 control platform, it is engineered to operate under harsh industrial conditions.
Serving as a critical I/O and control processing unit in ABB high-end DCS/PLC systems, UAA326A02 HIEE300024R2 features core functions including motor load curve monitoring, high-precision analog and digital signal acquisition and conditioning, complex control logic computation, and comprehensive fault protection. It is widely used in excitation control, speed regulation, and protection systems for hydroelectric power plants, thermal power plants, combined-cycle power stations, and large rotating machinery.
Core Advantages
- High Reliability: Designed for continuous operation in critical power generation infrastructure.
- Strong Anti-interference Capability: Complies with stringent industrial EMC standards and operates stably in strong electromagnetic environments.
- Fast Response: Equipped with a 32-bit embedded processor to achieve millisecond-level data processing.
Technical Specifications
Basic Information
- Model: UAA326A02
- Order No.: HIEE300024R2
- Brand: ABB
- Country of Origin: Switzerland
- Type: Control Motherboard / Programmable I/O Module
Hardware Specifications
- Dimensions (L × W × H): Approx. 263 mm × 138 mm × 88 mm
- Weight: Approx. 1.2 kg
- Supply Voltage: 24V DC ±20%
- Power Consumption: Max. 5W
- Protection Class: IP20 (for installation in protective cabinets)
- Mounting: Standard rack / DIN rail mounting
Signals & Interfaces
- Digital Input (DI): 16 channels, 24V DC, optically isolated
- Analog Input (AI): 4 channels, ±10V / 4–20mA, accuracy 0.1% FS
- Digital Output (DO): 8 channels, 24V DC / 5A, relay / transistor output
- Analog Output (AO): 2 channels, ±10V / 4–20mA
- Communication Interfaces: RS-485 (Modbus RTU), Ethernet
Environmental Specifications
- Operating Temperature: -25℃ to +60℃
- Storage Temperature: -40℃ to +85℃
- Relative Humidity: 5%–95% (non-condensing)
- Vibration Resistance: Compliant with IEC 60068-2-6 certification
- Electromagnetic Compatibility: Meets industrial EMC standards
Main Functions & Features
Load Curve Monitoring
- Built-in dedicated motor load curve algorithm.
- Constructs operating envelope with ±10% margin based on rated torque.
- Monitors load signals related to frequency / speed in real time, triggering alarms or tripping when limits are exceeded.
- Supports underload monitoring to detect anomalies such as broken conveyor / fan belts and load loss.
Advanced Signal Processing Capability
- 32-bit embedded processor: Achieves millisecond-level processing latency and high throughput.
- High-precision signal conditioning: Hardware filtering suppresses electromagnetic interference on industrial sites.
- Multi-channel parallel acquisition: Synchronous sampling, digital response time ≤ 1μs.
Intelligent Control & Protection
- Programmable logic: Supports custom control algorithms and protection logic via ABB engineering software.
- Comprehensive fault protection: Provides monitoring and protection against overcurrent, overvoltage, overload, communication interruption, etc.
- Remote diagnosis: Supports remote status monitoring, parameter configuration and troubleshooting.
Seamless System Compatibility
- Native adaptation: Fully compatible with ABB UNITROL 6000 and HIEE3000 series control systems.
- Industrial buses: Supports Modbus, Profibus and other protocols for easy integration into various DCS systems.
- Hot-swappable: Some configurations can be replaced without shutdown, simplifying maintenance.
Application Scenarios
- Hydropower and pumped storage plants: Generator excitation control, speed regulation
- Thermal power and combined-cycle power plants: Turbo-generator protection, load monitoring
- Large rotating machinery: Motor speed regulation, torque control, safety interlocking
- Industrial automation lines: High-precision equipment control, equipment condition monitoring
Frequently Asked Questions (FAQ)
Q1: What is the difference between UAA326A02 and UAA326A04?A1: Both belong to the HIEE3000 series and share the same core functions.UAA326A02 (HIEE300024R2): Basic version with standard I/O configuration (16DI / 4AI / 8DO / 2AO).UAA326A04 (HIEE300024R4): Enhanced version with upgraded channel count and processing capability, suitable for more complex control applications.
Q2: The ERR indicator stays lit after power‑on. How to troubleshoot?A2:
- Check if the 24V DC power supply is stable and within the ±20% tolerance range.
- Check all I/O wiring for short circuits or loose connections.
- Read the specific fault code via ABB programming software to identify power, communication or channel faults.
- Try restoring factory settings or re‑downloading the application program.
Q3: Is it compatible with third‑party PLC/DCS systems?A3: Yes. The module is equipped with standard RS‑485 (Modbus RTU) and Ethernet interfaces. It can communicate with third‑party systems such as Siemens and Rockwell via standard protocols by configuring consistent communication parameters (baud rate, station address, data bits, etc.).
Q4: Which excitation system models is it suitable for?A4: It is mainly compatible with the ABB UNITROL 6000 series (e.g., 6080, 6050), and can also be used for the upgrade and retrofit of control units in older ABB excitation systems such as the UNITROL 5000 series.
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