Description
The ABB UFC921A101 (Part Number: 3BHE024855R0101) is a high-performance control and communication interface board utilized within the ABB Power Electronics and Excitation Systems ecosystem. It is primarily integrated into the UNITROL 6000 series and specialized Static Frequency Converters (SFC). The module serves as a central hub for fast signal processing and synchronization between the master controller and the power conversion stages.
Product Technical Description
The UFC921A101 is designed for high-speed deterministic control. It manages the flow of data between the AC 800PEC control platform and the various measurement or gate driver units.
- Signal Processing: Equipped with high-speed logic circuits to handle real-time PWM (Pulse Width Modulation) generation and synchronization for thyristor or IGBT bridges.
- Fiber-Optic Communication: Features multiple integrated fiber-optic ports (typically ST or SMA connectors) to provide total galvanic isolation between the low-voltage control rack and high-voltage power sections.
- System Reliability: Engineered to operate in environments with high electromagnetic noise, ensuring that firing pulses remain accurate even during grid disturbances.
- Hardware Monitoring: Includes self-diagnostic functions that monitor the integrity of the board’s power supply and the status of its communication links.
ABB UFC921A101 3BHE024855R0101
Product Datasheet (Parameters)
| Parameter | Specification |
| Product ID | 3BHE024855R0101 |
| Model Type | UFC 921 A101 |
| Series | UNITROL 6000 / AC 800PEC |
| Supply Voltage | 24V DC (±10%) |
| Input Channels | High-speed digital and fiber-optic inputs |
| Output Channels | Fiber-optic pulse outputs for gate drivers |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Cooling | Natural convection / Cabinet airflow |
| Country of Origin | Switzerland |
Technical Characteristics
- High-Resolution Timing: Optimized for sub-microsecond pulse precision, critical for minimizing harmonics in large-scale frequency converters.
- Modularity: Designed as a plug-in Eurocard module for easy installation into standard 19-inch ABB control subracks.
- Communication Protocols: Supports proprietary high-speed serial links used for internal system bus communication.
Common Questions & Answers (Q&A)
Q: Can a UFC921A101 be swapped between different UNITROL 6000 cabinets? A: Physically, yes; however, the board may require specific firmware or parameter settings tailored to the generator or motor it is controlling. Always verify the software version before placing it into a live system.
Q: What is the primary function of the fiber-optic ports on the front panel? A: These ports are used to transmit firing pulses to the gate driver boards and receive feedback signals from measurement units, protecting the board from high-voltage surges.
Q: How do I interpret the “RUN” and “FAULT” LEDs? A: A steady green “RUN” LED indicates normal operation. A red “FAULT” LED indicates an internal hardware failure, a watchdog timeout, or a loss of synchronization with the master clock.
Q: Is the 3BHE024855R0101 compatible with older UNITROL 5000 systems? A: No. The UFC921 series is specifically designed for the AC 800PEC-based UNITROL 6000 and is not backward compatible with the hardware architecture of the UNITROL 5000.
Similar Model Recommendations (8 Units)
- UFC921A102: A variation of the same board with different optical transmitter strengths.
- PPC907BE (3BHE024577R0101): The main PowerPC processor board that often provides logic to the UFC921.
- GCC960C103 (3BHE033067R0103): A specialized control unit used in modern excitation systems.
- UAD206A101 (3BHE019958R0101): A common interface board found in the same control racks.
- PDD200A101 (3BHE019633R0101): A pulse distributor board used for thyristor triggering.
- UNS2880a-V1: A legacy control or measurement interface within the UNITROL family.
- CIO962A102: An I/O interface board typically paired with the UFC series.
- 3BHE039017R0101: A high-tier controller board used for advanced motor control applications.
