Description
ABB UFC921A 3BHE024856P106 Product Description
Product Overview
ABB UFC921A 3BHE024856P106 is an industrial control and computing module associated with ABB’s AC 800PEC high-performance control platform. The ABB UFC921A 3BHE024856P106 is used as a processing component within ABB power electronics and drive-control systems, providing the computing resources required for high-speed control algorithms, system coordination, communication, and monitoring. It is designed for applications where conventional PLC scan cycles are insufficient and fast deterministic processing is required.
The UFC921A 3BHE024856P106 ABB belongs to ABB’s UFC9xx controller hardware family used in AC 800PEC-based installations. The AC 800PEC architecture combines high-performance controller processing with dedicated power-electronics interfaces, making it suitable for demanding converter, inverter, excitation, drive, and power-quality applications. The module is therefore more accurately positioned as a high-performance controller/CPU component rather than a conventional discrete I/O module.
For existing ABB installations, ABB UFC921A 3BHE024856P106 is particularly valuable as a replacement and lifecycle-maintenance component. Maintaining the original controller hardware can preserve application-specific firmware, control logic, I/O configuration, and communication architecture while avoiding unnecessary redesign of an established power-electronics control system.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | UFC921A 3BHE024856P106 |
| Manufacturer | ABB |
| Product Type | High-Performance Controller / CPU Module |
| Product Family | ABB AC 800PEC |
| Controller Series | UFC9xx |
| Main Function | High-Speed Control Processing |
| Application | Power Electronics / Drive Control / Industrial Automation |
| Control Architecture | ABB AC 800PEC |
| Processing Function | Real-Time Control, Regulation, Sequencing and System Management |
| I/O Integration | AC 800PEC Control Electronics / Peripheral Interfaces |
| Communication | Application-dependent AC 800PEC communication interfaces |
| Installation | ABB Control Cabinet / AC 800PEC Hardware Platform |
| Cooling | System-dependent cabinet cooling |
| Typical Application | Drives, Converters, Inverters, Power Conversion Systems |
| Part Number | 3BHE024856P106 |
Exact processor, memory, communication-interface and electrical ratings can vary by UFC921A hardware revision and complete AC 800PEC configuration. For replacement projects, the complete ABB order code and firmware compatibility should be verified before installation.
Main Features and Advantages
High-Speed Real-Time Processing
The primary advantage of ABB UFC921A 3BHE024856P106 is its use within the AC 800PEC high-performance control architecture. Unlike conventional PLC hardware intended primarily for sequential machine logic, AC 800PEC controllers are designed for fast control of power-electronic equipment. This makes the UFC921A suitable for applications requiring rapid execution of regulation and protection algorithms.
Designed for Power-Electronics Control
The UFC921A ABB is intended for systems in which precise coordination between control software, measurement signals, firing/control functions, and power-converter hardware is essential. It can form part of the control platform for converters, inverters, industrial drives and other high-power electrical equipment.

UFC921A
Deterministic Control Architecture
Power-electronics systems can react extremely quickly to changes in current, voltage, speed, torque, or load. The AC 800PEC architecture provides dedicated control functionality for these applications, allowing the UFC921A 3BHE024856P106 to participate in deterministic control and regulation tasks where timing and synchronization are critical.
Flexible System Integration
The controller is designed to operate as part of a complete AC 800PEC system rather than as an independent PLC. This allows it to work with associated I/O, measurement, communication and power-electronics interface hardware. The modular architecture makes it possible to configure the controller according to the specific converter or drive application.
Suitable for Legacy System Replacement
For industrial plants operating ABB power-conversion equipment, ABB UFC921A 3BHE024856P106 can be an important maintenance spare. Replacing the controller rather than the entire converter or drive system can reduce downtime and preserve existing control engineering, cabinet wiring and application-specific configuration.
Application-Specific Firmware Compatibility
Because AC 800PEC systems can contain application-specific control software, the correct firmware and hardware revision are important when replacing a UFC module. Matching the original UFC921A 3BHE024856P106 order code helps reduce commissioning risk and improves compatibility with the installed control application.
Application Fields
ABB UFC921A 3BHE024856P106 is primarily suited to industrial power-electronics control applications. In large drive systems, it can participate in the control architecture for high-power motors, pumps, fans, compressors and other rotating equipment where fast torque and speed regulation are required.
In power-generation and electrical-grid applications, the UFC921A ABB can be used within converter and inverter systems requiring rapid control of voltage, current, frequency, or power flow. Its high-performance control architecture is particularly relevant to equipment where power-electronic switching and electrical measurements must be coordinated with very short response times.
In metals, mining, pulp and paper, and other heavy industries, ABB AC 800PEC-based systems can be applied to demanding electrical-drive and power-conversion equipment. These environments require robust control hardware capable of operating continuously while managing large electrical loads and rapidly changing process conditions.
The ABB UFC921A 3BHE024856P106 is also valuable for maintenance of established ABB drive and converter installations. It can support replacement of failed controller hardware while retaining the existing AC 800PEC architecture, helping reduce engineering modifications and production downtime during lifecycle maintenance.
Related Products
- UFC718AE01 — ABB AC 800PEC controller hardware used in high-performance power-electronics control applications.
- UFC719AE01 — Related ABB UFC controller variant for AC 800PEC-based control architectures.
- UFC760BE01 — High-performance ABB control module used within AC 800PEC systems.
- UFC766AE01 — Related UFC-series controller hardware for ABB power-electronics applications.
- UFC789AE101 — ABB UFC controller variant used in advanced drive and converter control systems.
- AC 800PEC — ABB high-performance programmable control platform specifically designed for demanding power-electronics and drive applications.
- PP D104 — ABB power-electronics control platform associated with high-speed converter and drive applications.
- 3BHE024855R0101 — Related ABB AC 800PEC/UFC hardware part number used in compatible control-system configurations.
- 3BHE024856R0101 — Related ABB controller hardware designation that may be encountered in AC 800PEC replacement and maintenance projects.
