Product Description

Overview

The UNS0868A-P V2 (part number HIEE305120R2) is an advanced application processor board within the UNITROL 6000 series, integrated into ABB’s MEGACONTROL excitation system. Designed as the central computational unit, it manages high-speed control loops, generator excitation, and complex communication tasks for large-scale industrial and power applications. The V2 hardware revision enhances processing efficiency and long-term reliability through upgraded components.

Key Features

High-Speed Processing

• Executes real-time control algorithms for Automatic Voltage Regulation (AVR) and Power System Stabilizer (PSS) operations.

• Supports dual-tasking for simultaneous local control and data communication with supervisory systems.

Robust Communication Interfaces

• Compatible with multiple fieldbus standards, including Ethernet, Modbus, and Profibus.

• High-bandwidth backplane interface ensures seamless integration with I/O modules and firing pulse boards in the UNITROL rack.

Reliability and System Integrity

• Supports redundant configurations with Hot Standby or Parallel Redundant operation to ensure continuous generator output.

• Built-in self-diagnostics, including Power-On Self-Test (POST) and runtime monitoring for hardware and memory faults.

Industrial-Grade Design

• Ruggedized for harsh electromagnetic environments with high noise immunity.

• Non-volatile flash memory retains firmware, settings, and parameter configurations across power cycles.

Power Supply Capability

• Provides regulated 24 V DC output for internal modules and auxiliary components.

• Capable of up to 5 A output current, supporting demanding control cabinet loads.

• High-efficiency semiconductor design minimizes energy loss.

• Cooling through passive or forced air ensures stable operation under elevated temperatures.

Technical Specifications

Typical Applications

• Excitation control for large synchronous generators in hydro, gas, or nuclear power plants.

• Static Frequency Converters (SFC) for turbine starting.

• High-level control for industrial motor drives in mining, oil, and gas operations.

FAQ

What is the UNS0868A-P V2 used for?
It serves as the main processing unit for ABB MEGACONTROL excitation systems, managing control loops, communication, and generator excitation.

Is it compatible with legacy UNITROL 6000 racks?
Yes, it fits standard subrack/Eurocard formats and integrates with existing I/O modules.

How is redundancy handled?
The board supports hot standby and parallel redundant configurations to maintain continuous operation during a primary processor failure.

Does it require special software for replacement?
Yes, ABB UNITROL Toolset is needed to reload firmware and restore system parameters after replacement.