3BSE004736R1 PU512V1 ABB Bailey

The Central Processing Unit forms the backbone of the INFI 90 process control station. It is a high-performance module designed to execute user-configured control logic, handle analog and digital input/output signal processing, and manage continuous communication across the system network via the INFI-Net or Plant Loop. Built for mission-critical industrial environments, the module supports both standalone operation and fully redundant dual-CPU configurations to ensure uninterrupted operation.

Key Product Parameters

• Processor Architecture: High-performance 32-bit microprocessor tailored for real-time control algorithms

• Memory Capabilities: Onboard high-speed RAM for dynamic data execution and Non-Volatile RAM (NVRAM) or Flash memory for permanent logic and configuration storage

• Processing Capacity: Supports thousands of function blocks including PID, mathematical functions, logic gates, and sequential logic

• Scan Rate: Configurable loop execution cycles ranging from tens of milliseconds to seconds

• Interface Compatibility: Direct backplane interface with standard INFI 90 bus, module bus, and communication termination units

• Operating Temperature: 0 to 50 degrees Celsius (32 to 122 degrees Fahrenheit)

• Operating Humidity: 5 to 95 percent relative humidity, non-condensing

• Power Supply: Dual redundant 5 Volts DC power input from standard power module chassis

Major Product Advantages

• High Reliability and Fault Tolerance: Supports seamless automatic failover in redundant dual-CPU setups, guaranteeing zero interruption to active processes during primary unit maintenance or failure.

• Exceptional Algorithmic Power: Built-in library of function blocks easily handles complex continuous control, batch control, and discrete logic without external computing support.

• Long Lifespan and System Compatibility: Seamlessly integrates into existing Bailey Network 90 and INFI 90 hardware installations, reducing capital expenditure by extending system life cycles.

• Robust Industrial Design: Built with industrial-grade components capable of resisting electrical noise, electromagnetic interference, and hostile factory environments.

Important Operational Considerations

• Proper Grounding and Shielding: Ensure strict adherence to ABB grounding standards during installation to prevent ground loops and high-frequency noise from affecting CPU stability.

• ESD Precautions: Always observe Electrostatic Discharge (ESD) protocols, including wearing grounded wrist straps, when inserting, removing, or handling module hardware.

• Firmware Compatibility: Verify that the CPU firmware version aligns with the current engineering workstation software and existing module revisions in the system rack before deployment.

• Power Sequence and Ventilation: Maintain adequate spacing and forced cooling within the module rack to avoid thermal buildup, and ensure regulated power sources are stable prior to system start-up.

Typical Product Applications

• Power Generation: Primary control for boilers, turbine control, burner management systems, and plant balance-of-plant automation in thermal, nuclear, and combined-cycle power plants.

• Oil and Gas: Process control for offshore production platforms, pipeline monitoring stations, gas processing units, and oil refining operations.

• Chemical and Petrochemical: Management of complex reactors, distillation columns, mixing vessels, and continuous chemical synthesis processes.

• Pulp and Paper: Operational control of digesters, bleach plants, recovery boilers, and paper machine speed control systems.

• Water and Wastewater: Automated management of large-scale pumping stations, filtration processes, chemical dosing systems, and distribution networks.