UNITROL 1000 ABB Bailey

The ABB Bailey Multi-Function Processor Module (commonly represented by model series such as IMMFP01, IMMFP02, IMMFP12, and BRC100/200/300) is a core computational unit designed for the ABB Bailey Network 90 and INFI 90 Distributed Control Systems (DCS). It acts as an autonomous processing hub capable of executing complex continuous, sequential, batch, and logic control operations within heavy industrial environments.

The module contains its own microprocessor, high-speed memory subsystems, onboard diagnostics, and dedicated communication interfaces. Operating independently within an INFI 90 Module Mounting Unit (MMU) slot, it offloads heavy control logic execution from central network controllers, ensuring localized real-time task execution, high reliability, and seamless integration with I/O expansion modules and field networks.

Product Parameters

Processor Architecture: 32-bit internal microprocessor running at 16 MHz with a 16-bit external data bus

System Memory: 512 KB EPROM/ROM for firmware, 512 KB RAM for runtime dynamic memory execution, and 256 KB Non-Volatile RAM (NVRAM) for configuration and data retention during power interruption

Power Supply Input: +5 VDC supplied directly via the system backplane bus

Power Consumption: Approximately 10 Watts typical at 2 Amps

Serial Communication Interfaces: Two RS-232-C asynchronous serial ports, with option slots supporting RS-485 interfaces for station and field communications up to 19.2 kbaud

Network Capacity: Supports redundant 1 Mbaud module bus links, up to 64 serial station connections, and process control unit (PCU) communication nodes

Operating Temperature: 0 to 70 degrees Celsius (32 to 158 degrees Fahrenheit)

Storage Temperature: -40 to +85 degrees Celsius (-40 to +185 degrees Fahrenheit)

Relative Humidity: 5% to 95% non-condensing up to 55 degrees Celsius

Form Factor & Mounting: Single-slot circuit card assembly designed for insertion into standard INFI 90 or Network 90 MMU backplane slots

Weight: Approximately 0.5 kilograms (1.1 pounds)

Programming Languages Supported: Function Code Logic, C Language, BASIC, BATCH control language, user-defined functions, and Ladder Logic

Product Advantages

Autonomous Processing Power: Handles processing tasks locally, reducing network latency and preventing single-point system failures across the DCS architecture.

Flexible Programming Support: Allows engineers to write programs using traditional function blocks, C code, BASIC, or batch-specific languages, enabling flexible execution of advanced control strategies.

High Reliability & Redundancy: Built for 24/7 continuous process operations with support for redundant module pairs and redundant communication buses.

Backward and Forward Compatibility: Fully integrates into legacy Network 90, INFI 90, INFI 90 Open, and modern ABB Symphony Plus DCS platforms.

Robust Onboard Memory: Non-volatile RAM keeps critical tuning constants, configuration parameters, and process values secure during sudden power disruptions.

Operating Considerations and Cautions

Electrostatic Discharge (ESD) Protection: The module contains sensitive electronic circuitry; personnel must wear grounded wrist straps during handling, installation, or removal.

Hot-Swapping Rules: While INFI 90 systems support modular servicing, module replacement or bus disconnects should strictly follow ABB procedures to prevent bus disturbances or control interruptions.

Environmental Controls: Ambient air must be kept non-corrosive and clean, free of conductive dust or corrosive gases like hydrogen sulfide.

Electromagnetic Interference (EMI): Portable handheld radio transmitters or walkie-talkies should not be operated within two meters of open control cabinet doors to prevent signal interference. Cabinet doors should remain closed during regular operation.

Power Supply Stability: Requires a clean, regulated +5 VDC source from the power chassis. Voltage fluctuations outside specified tolerances can cause processing resets or faulty I/O execution.

Product Applications

Thermal and Nuclear Power Generation: Controls boiler operation, burner management systems (BMS), steam turbine speed, feed-water regulation, and plant utility loops.

Oil, Gas, and Petrochemicals: Handles continuous process loops, wellhead automation, pipeline monitoring, distillation column control, and reactor temperature stabilization.

Chemical Processing: Executes batch recipes, sequence control, ingredient dosing, and safety shutdown interlocks.

Pulp and Paper Manufacturing: Regulates digester processes, paper machine drives, bleaching line controls, and stock preparation units.

Water and Wastewater Management: Manages large-scale pump stations, aeration tanks, filtration sequences, and chemical treatment distribution lines.