ABB Bailey IIMPM01 Processor Module | Multibus 256 kB INFI 90

This multibus processor module serves as the central 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 IIMPM01 measures 25.0 cm in length and 18.0 cm in width. Moreover, its module weight equals approximately 0.98 kg for rack mounting. A single 48-pin male connector links this module to the INFI 90 backplane. Additionally, the processor includes integrated communication ports and memory expansion.

Parameter	Specification
Brand	ABB Bailey
Full Model	IIMPM01
Category	Multibus Processor Module
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″)
Module Weight	0.98 kg (2.16 lbs)
Backplane Interface	1 x 48-pin Male Connector (INFI 90 Rack)
Power Supply Input	5 VDC from Backplane (1.6 A Typical)
Power Consumption	8.0 W (Typical)
Processor Type	16-bit Microcontroller (20 MHz)
Program Memory	256 kB RAM (Battery Backed)
Data Memory	128 kB RAM (Retentive with Battery)
Backup Battery	Internal Lithium (3V, 5 Year Life)
Execution Speed	0.5 µs per Boolean Instruction
Built-In Communication Ports	2 x RS-232 (Modbus + Bailey PC90)
Supported Protocols	Modbus RTU + Bailey PC90
Baud Rate Range	1200 to 38400 baud
Multibus Expansion	Yes (Multibus I/O Interface)
Maximum Digital I/O	1024 Points (with Expansions)
Maximum Analog I/O	128 Channels (with Expansions)
Programming Languages	Ladder Diagram (LD) + Function Block (FBD)
Task Types	Cyclic + Periodic + Event
On-Board Components	1 CPU IC + 4 Memory Chips + 2 UARTs + 1 RTC + 2 Line Drivers + 2 Optocouplers + 8 Protection Diodes + 1 Voltage Regulator + 1 Multibus Controller IC
Energy Storage	4 x 220 µF Electrolytic Capacitors (35V) + 2 x 47 µF Tantalum (25V) + 1 x CR2032 Backup Battery
Battery Backup Time	5 Years (Typical for RAM and RTC Retention)
Scan Time	3 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) + 1 Green LED (Multibus Active)

Processing Performance and Memory Architecture

The ABB Bailey IIMPM01 features a 16-bit microcontroller running at 20 MHz. Specifically, the 256 kB program memory stores complex ladder and function block applications. In addition, the 128 kB data memory holds process variables and retentive values. Moreover, the execution speed of 0.5 µs per Boolean instruction ensures fast response. Furthermore, a lithium battery retains RAM contents for up to five years. Consequently, this multibus processor module delivers reliable control for INFI 90 applications.

Multibus Expansion and Communication Features

You will find multibus expansion capability built into this processor module. For instance, the multibus interface connects to additional I/O modules for system growth. In addition, two serial ports provide networking for HMI and SCADA connectivity. Moreover, the first RS-232 port supports Modbus RTU for third-party device integration. Furthermore, the second RS-232 port handles Bailey PC90 protocol for legacy equipment. Thus, this processor integrates seamlessly into INFI 90 automation architectures.

Built-In Real-Time Clock and Task Management

This multibus processor module 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, and event-driven task execution. Moreover, a built-in watchdog timer monitors program execution for faults continuously. Therefore, the ABB Bailey IIMPM01 meets demanding response time requirements reliably.

Installation and Diagnostic Indicators

Seven LED indicators provide operational status at a glance on this module. 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. In addition, two yellow LEDs indicate port activity for both serial ports. Finally, a green Multibus Active LED shows expansion bus communication. Thus, you can diagnose system health instantly without external tools.