ABB Bailey IMMFP05 Core Processing Unit

This core processing unit serves as the main controller for ABB Bailey INFI 90 automation systems. It executes user application logic for turbine and process control applications. Therefore, it delivers reliable real-time control for power generation and industrial plants.

Physical and Processor Specifications

The ABB Bailey IMMFP05 measures 25.0 cm in length and 18.0 cm in width. Moreover, its unit weight equals approximately 0.95 kg for rack mounting. A single 48-pin male connector links this CPU to the INFI 90 backplane. Additionally, the processor includes built-in communication ports and memory expansion capability.

Parameter	Specification
Brand	ABB Bailey
Full Model	IMMFP05
Category	Core Processing Unit (CPU)
Dimensions (L x W x H)	25.0 cm x 18.0 cm x 5.5 cm (9.84″ x 7.09″ x 2.17″)
Unit Weight	0.95 kg (2.09 lbs)
Backplane Interface	1 x 48-pin Male Connector (INFI 90 Rack)
Power Supply Input	5 VDC from Backplane (1.5 A Typical)
Power Consumption	7.5 W (Typical)
Processor Type	32-bit RISC (25 MHz)
Program Memory	512 kB RAM (Battery Backed)
Data Memory	256 kB RAM (Retentive with Battery)
Backup Battery	Internal Lithium (3V, 5 Year Life)
Execution Speed	0.3 µs per Boolean Instruction
Built-In Communication Ports	2 x RS-232 (Modbus + Bailey PC90)
Supported Protocols	Modbus RTU + Bailey PC90 + Modbus Plus
Baud Rate Range	1200 to 38400 baud
Memory Expansion Slot	Yes (PCMCIA Type I)
Maximum Digital I/O	2048 Points (with Expansions)
Maximum Analog I/O	256 Channels (with Expansions)
Programming Languages	Ladder Diagram (LD) + Function Block (FBD) + Sequential (SFC)
Task Types	Cyclic + Periodic + Event + Interrupt
On-Board Components	1 CPU IC + 4 Memory Chips + 2 UARTs + 1 RTC + 2 Line Drivers + 8 Protection Diodes + 1 Voltage Regulator
Energy Storage	4 x 220 µF Electrolytic Capacitors (35V) + 2 x 10 µF Tantalum (25V) + 1 x CR2032 Backup Battery
Battery Backup Time	5 Years (Typical for RAM and RTC Retention)
Scan Time	2 ms for 16 kB of Ladder Logic
Operating Temperature	0°C to +55°C (32°F to 131°F)
Storage Temperature	-25°C to +85°C (-13°F to 185°F)
Mounting Type	INFI 90 Rack (Single Slot)
Status Indicators	1 Green LED (Power) + 1 Green LED (Run) + 1 Red LED (Fault) + 1 Yellow LED (Battery Low) + 2 Yellow LEDs (Port Activity)

Processing Performance and Memory Architecture

The ABB Bailey IMMFP05 features a 32-bit RISC processor running at 25 MHz. Specifically, the 512 kB program memory stores complex ladder and function block applications. In addition, the 256 kB data memory holds process variables and retentive values. Moreover, the execution speed of 0.3 µs per Boolean instruction ensures fast response. Furthermore, a lithium battery retains RAM contents for up to five years. Consequently, this core processing unit delivers high-performance control for demanding INFI 90 applications.

Communication and Expansion Capabilities

You will find two serial ports for networking on this core processing unit. For instance, the first RS-232 port supports Modbus RTU for HMI and SCADA connectivity. In addition, the second RS-232 port handles Bailey PC90 protocol for legacy device communication. Moreover, the PCMCIA slot accepts memory cards for program backup or protocol expansion. Thus, this processor integrates seamlessly into INFI 90 automation architectures.

Built-In Real-Time Clock and Task Management

This core processing unit includes a real-time clock for time-stamped events. Specifically, the clock retains date and time during power loss using battery backup. In addition, the CPU supports cyclic, periodic, event, and interrupt tasks flexibly. Moreover, a built-in watchdog timer monitors program execution for faults continuously. Therefore, the ABB Bailey IMMFP05 meets demanding response time requirements reliably.

Installation and Diagnostic Indicators

Seven LED indicators provide operational status at a glance on this unit. First, a green Power LED lights when the 5 VDC backplane supply is present. Second, a green Run LED flashes during normal program execution. Third, a red Fault LED indicates hardware or software errors. Fourth, a yellow Battery Low LED warns when the backup battery needs replacement. Finally, two yellow Port Activity LEDs illuminate during data transmission or reception. Thus, you can diagnose system health instantly without external tools.