UFC721AE101 3BHB002916R0101 ABB

The UFC721AE101 3BHB002916R0101 is the main CPU module for the AC 800M Programmable Automation Controller (PAC) platform and serves as the core processing unit within the System 800xA Distributed Control System (DCS).

It serves as the "brain" of the control rack, responsible for executing process automation logic operations, I/O scheduling, communication management, and advanced control algorithms. It also supports a 1:1 hot-standby redundancy configuration, providing a highly reliable control engine for continuous-process industries.

As the platform's primary CPU module, the UFC721AE101 employs a proven 32-bit RISC architecture, ensuring microsecond-level scan cycles while avoiding the indeterminacy risks associated with complex multi-core designs.

The dual 10/100 Mbps Ethernet ports are not only used for HMI communication and engineering station connections but also support hardware-level synchronous redundancy—when the primary and backup CPUs exchange states via a dedicated synchronization cable, the switchover time is less than 10 milliseconds, ensuring that critical loops remain undisturbed.

• The single-task cycle time can be stably controlled between 10 and 50 ms, meeting the requirements of fast processes such as boiler combustion control and steam drum water level regulation.
• Supports 1:1 hot standby redundancy; the primary and standby CPUs share the same IP address, ensuring that OPC clients are unaware of the switchover and guaranteeing the continuity of the SCADA data stream.
• All communication ports feature 500 Vrms electrical isolation, effectively shielding against ground potential difference interference caused by variable frequency drives and the start/stop cycles of large motors.
• Supports communication interfaces such as CI854A (PROFIBUS DP) and IMRIO02 (PROFINET), offering powerful remote I/O expansion capabilities.
• Operating temperature range: 0°C to +60°C
• Storage temperature range: -40°C to +85°C

In the AC 800M system, the UFC721AE101 requires a redundant chassis and a spare CPU to achieve maximum performance. Typical configuration options are as follows:

In the emergency shutdown system (ESD) of a cracker at a certain petrochemical plant, the UFC721AE101 achieved a rapid response time of 0.5 ms for furnace pressure exceeding the limit. Together with the PPC902AE101 controller and CI845 communication module of the AC800M system, it established a comprehensive safety control system spanning the entire process, from sensors to actuators.

• What are the main functions of the UFC721AE101?
  As the core CPU module of the ABB DCS, it is responsible for data acquisition, logic execution, and communication management, and serves as the main control engine for the AC 800M / System 800xA platform.
• Does the UFC721AE101 support a redundant configuration?
  Yes. It must be paired with the UFC721BE101 standby CPU to achieve 1:1 hot-standby redundancy; when used alone, it operates in standalone mode.
• What is the operating temperature range for this module?
  The operating temperature range is 0°C to +60°C, and the storage temperature range is -40°C to +85°C.