ABB Bailey IMMFP11 Multi-Function Processor

Processing Power and Control Capabilities

The ABB Bailey IMMFP11 serves as a high-performance processor for Bailey distributed control systems. This module executes complex control strategies and data acquisition tasks simultaneously. It handles both analog and digital I/O processing across multiple racks.

Technical Specifications

Parameter	Specification
Model	IMMFP11
Category	Multi-Function Processor Control Module
Height	310 mm
Width	45 mm
Depth	250 mm
Weight	1.45 kg
Processor	32-bit MC68020 at 25 MHz
Program Memory	512 KB flash EPROM
Data Memory	256 KB static RAM
Configuration Memory	128 KB EEPROM
Communication Ports	2 x RS-232, 2 x RS-485
Network Support	Bailey INFI-NET, MODBUS
I/O Capacity	1024 analog points, 2048 digital points
Scan Rate	10 ms for digital, 50 ms for analog
Connector Type	1 x 48-pin backplane, 2 x DB9
Status Indicators	5 x LEDs (PWR, RUN, ERR, COM1, COM2)
Internal Components	1 CPU board, 1 memory board, 1 battery, 1 heatsink
Energy Storage	2400 mAh lithium battery

Processing Architecture and Memory Organization

The IMMFP11 contains two separate circuit boards inside its metal housing. One CPU board carries the 32-bit MC68020 processor running at 25 MHz. One memory board provides 512 KB of flash and 256 KB of static RAM. A 128 KB EEPROM stores configuration data permanently without power. The ABB Bailey IMMFP11 uses a 2400 mAh lithium battery for RAM backup. An aluminum heatsink dissipates heat from the processor during heavy loads.

Communication and Network Integration

This multi-function processor supports Bailey INFI-NET for peer-to-peer communication. It also handles MODBUS protocol for third-party device integration. Two RS-232 ports connect to programming terminals or local HMIs. Two RS-485 ports support multi-drop networks to remote I/O racks. The IMMFP11 communicates with up to 64 field devices on each network. Five status LEDs provide clear visual feedback about processor health.

I/O Processing and Scan Performance

The ABB Bailey IMMFP11 handles 1024 analog input and output points simultaneously. It also manages 2048 digital I/O points without performance degradation. The module scans digital inputs every 10 milliseconds for fast response. It updates analog values every 50 milliseconds for stable control. The processor executes PID loops, logic sequences, and math calculations concurrently.

Physical Dimensions and Installation Guidelines

The ABB Bailey IMMFP11 weighs 1.45 kilograms for secure rack mounting. Its height measures 310mm, width 45mm, and depth 250mm. This processor module consumes 10.2 watts from the backplane supply. Install the IMMFP11 in the master rack slot near the power supply. The module operates reliably from 0°C to +55°C ambient temperature. Leave 50mm clearance above and below for proper airflow.

Energy Storage and Battery Maintenance

The IMMFP11 uses a 2400 mAh lithium battery for RAM data retention. This battery preserves program logic and process variables during power loss. The battery lasts approximately five years under normal operating conditions. Replace the battery every four years for preventive maintenance. The red ERR LED flashes when the battery voltage drops below acceptable levels. Always perform battery replacement with the module powered on.