⚙️ Product Introduction
The ABB UFC921A101 (3BHE024855R0101 / 3BHE024856P201) is an industrial control and interface module used in ABB automation and power control systems. It is designed to provide processing, communication, signal interface, and control functions for ABB excitation systems, drives, and industrial automation equipment.
The module is commonly associated with ABB UNITROL excitation systems and ACS drive-related applications, where it works as a core interface board for signal processing, system communication, and control coordination.
🔧 Key Features
• ABB high-performance control interface module
• UFC921A101 INT-2 board design
• Supports industrial automation control applications
• Integrated processor and signal interface functions
• Suitable for excitation and drive control systems
• Supports analog and digital signal processing
• Industrial rack/module installation design
• High reliability for continuous operation
• Compatible with ABB control platforms
📋 Product Datasheet
• Brand: ABB
• Model: UFC921A101
• Part Number: 3BHE024855R0101
• Additional Part Number: 3BHE024856P201
• Product Type: Control Interface Module / INT-2 Board
• System Application: ABB UNITROL Excitation / Industrial Drive Systems
• Processor Function: Integrated control processing
• Analog Input: Up to 8 channels*
• Analog Output: Up to 4 channels*
• Digital Input: Up to 16 channels*
• Digital Output: Up to 8 channels*
• Communication Interface: ABB internal communication bus
• Supported Protocols: MasterBus, Modbus, Profibus DP, CANopen (configuration dependent)*
• Input Signal Range: 0–10 V / 0–20 mA / 4–20 mA*
• Digital Voltage Level: 24 VDC*
• Power Supply: ABB system power supply
• Power Consumption: Approx. 15 W*
• Dimensions: Approx. 260 × 120 × 40 mm*
• Weight: Approx. 1 kg
• Mounting: ABB control rack installation
• Operating Temperature: Approx. -20 to +60 °C*
• Country of Origin: Sweden
• Application: Excitation Control, Drive Control, Industrial Automation
🏭 Typical Applications
The ABB UFC921A101 module is mainly used in systems requiring reliable real-time control and signal processing.
Typical applications include:
• Generator excitation systems
• Power plant automation
• Industrial motor drive systems
• Frequency converter control
• Process automation systems
• Energy management equipment
⚡ Functional Description
The UFC921A101 works as a control and interface module inside ABB industrial control equipment. It processes input signals from sensors and field devices, executes control functions, and exchanges data with other system components.
In excitation applications, the module can support generator control functions by processing measurement signals and providing control outputs for stable voltage and power regulation.
In drive applications, it can operate as an interface/control board responsible for communication between control software, power electronics, and external I/O devices.
🔌 Communication Configuration
Basic setup procedure:
• Install the UFC921A101 module into the ABB control rack
• Confirm hardware revision and board identification
• Connect internal communication cables
• Configure I/O parameters in ABB engineering software
• Set communication parameters according to system design
• Verify signal exchange with connected modules
Before commissioning:
• Check module diagnostics
• Confirm parameter compatibility
• Verify analog input scaling
• Test digital input/output signals
• Check communication status
🛠️ Installation Notes
Before replacement, verify:
• Complete part number UFC921A101 3BHE024855R0101
• Additional reference 3BHE024856P201
• System model compatibility
• Firmware version
• Existing parameter backup
• Connector arrangement
Installation procedure:
• Disconnect system power
• Remove the existing control board carefully
• Install the replacement module
• Check all connectors and fixing points
• Restore power and monitor startup diagnostics
After startup:
• Confirm module recognition
• Check communication status
• Verify I/O operation
• Review system alarms
• Perform functional testing
📦 Ordering Information
The correct identification is:
ABB UFC921A101 3BHE024855R0101 3BHE024856P201 Control Interface Module
Available references identify this product as an ABB industrial control/interface module used in excitation systems, drives, and automation applications.
Please confirm the exact ABB part number, hardware revision, and application system before replacement to ensure correct compatibility.
*Specifications marked with an asterisk are reference values and should be verified against the exact hardware revision before engineering installation.
