ABB UNS0874A Control Module

ABB UNS0874A Control Module – Product Information

1. Product Overview

The ABB UNS0874A is a high-performance control module designed for ABB UNITROL 5000 series excitation control systems.
It provides precise control and monitoring of generator excitation systems, ensuring stable and efficient operation. The UNS0874A supports high-speed data processing and multiple signal interfaces, widely used in power plants, substations, and industrial power control systems.

2. Technical Specifications

• Model: UNS0874A

• Type: Control Module

• ABB Part Number: 3BHB002651R0001

• Applicable System: UNITROL 5000 series excitation control system

• Supply Voltage: 24 V DC

• Input/Output Interfaces: Digital I/O, Analog I/O

• Processing Capability: High-speed microprocessor, supports real-time control and data processing

• Operating Temperature: -20 ℃ to +60 ℃

• Storage Temperature: -30 ℃ to +85 ℃

• Dimensions: Approx. 150 × 120 × 50 mm

• Weight: Approx. 1.8 kg

• Protection Class: IP20

• Certifications: CE, UL, RoHS

3. Features and Advantages

1. High-Precision Control – Precisely regulates excitation current for stable generator operation.

2. High-Speed Data Processing – Supports complex control algorithms and real-time computation.

3. Multi-Interface Compatibility – Digital and analog I/O interfaces for expanded control functions.

4. Industrial-Grade Reliability – Anti-interference design suitable for harsh industrial environments.

5. Modular Design – DIN rail mounting for easy integration and maintenance.

6. Remote Monitoring Capability – Supports data acquisition and remote diagnostics.

7. High Compatibility – Compatible with ABB UNITROL 5000 series and related control systems.

4. Application Areas

• Power plant excitation control systems

• Industrial plant power control systems

• Substation automation and monitoring

• Energy management and distribution systems

5. Precautions

1. Confirm module compatibility with the system and connected devices before installation.

2. Ensure stable supply voltage to avoid affecting module performance.

3. Avoid use in high humidity, corrosive, or high electromagnetic interference environments.

4. Regularly check module operation and interface connections to ensure normal system operation.

5. Installation and maintenance must be performed by trained professionals; do not disassemble or modify the module.

The structure and details of the product：

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