Description

ABB HIEE300024R4 (UAA326A04) Product Description

Technical Specifications

• Product Model: HIEE300024R4, alias UAA326A04
• Brand: ABB
• Warranty: One Year
• Input Voltage: 24VDC standard industrial control power supply
• Operating Temperature: -20°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Response Time: ≤2ms deterministic closed-loop control calculation cycle
• Protection Class: IP20 (installation inside sealed control cabinets only)
• Accuracy Class: 0.1% full-scale analog signal conversion precision
• Output Frequency: Max 100Mbps backplane bus data transmission rate
• Rated Current Range: Maximum 450mA total module power consumption
• Communication Interface: ABB internal rack backplane bus, RJ45 Ethernet port, RS485 serial terminal, CAN bus interface
• Supported Protocols: Modbus RTU/TCP, CANopen, ABB UNITROL 6000 proprietary bus, TCP/IP
• Overload Capacity: 125% transient 24VDC voltage surge withstand for 20 seconds
• Dimensions: 166mm (H) × 112mm (W) × 36mm (D), standard DIN rail chassis mounting
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Product Overview

The HIEE300024R4 (UAA326A04) is a high-performance dedicated control processor module belonging to ABB UNITROL 6000 excitation and generator control system platform, mainly deployed for synchronous generator excitation regulation, rotating machinery closed-loop governing and power plant auxiliary equipment interlock protection in thermal power, hydropower and industrial self-generation stations. Equipped with a 32-bit industrial embedded microprocessor, this module runs real-time control algorithms to execute automatic voltage regulation (AVR), reactive power compensation, power factor adjustment, over-excitation/under-excitation limitation and generator fault protection logic, serving as the core computing unit of the entire excitation control rack.

It addresses core stability risks of traditional generator excitation control systems, including slow voltage response leading to grid oscillation, scattered discrete protection components causing complex wiring and high failure probability, insufficient data upload capacity to plant DCS/SCADA, lack of redundant communication links triggering system dropout, and incomplete fault waveform recording for post-trip root cause analysis. Built-in multi-channel isolated analog and digital signal acquisition circuits filter electromagnetic interference from high-voltage switchgear, transformers and large auxiliary motors, ensuring stable sampling of generator terminal voltage, stator current and rotor excitation current signals. Dual communication bus design supports redundant data transmission to eliminate single-point communication failure in critical power generation control loops.