ABB Bailey IMMPI02 | Processor Interface Module

The ABB Bailey IMMPI02 connects multifunction processors to the INFI 90 plant bus. This interface module handles high-speed data exchange between controllers and I/O subsystems. You can use it for complex control strategies requiring intensive calculation. It manages peer-to-peer communication and global database synchronization seamlessly. Consequently, this module supports advanced applications like boiler optimization and turbine control.

Technical Specifications Overview

Parameter	Detailed Specification
Model	ABB Bailey IMMPI02
Category	INFI 90 Multifunction Processor Interface Module
Processor Interface	Dedicated backplane bus (parallel, 16-bit)
Network Interface	INFI 90 plant bus (redundant, dual cables)
Data Throughput	2 Mbit/s (plant bus communication)
Buffer Memory	32 KB dual-port RAM
Scan Rate	5 ms to 50 ms (software selectable)
Number of Connections	Up to 32 remote modules per interface
Data Integrity	CRC-16 error checking on all transmissions
Operating Voltage	5V DC from backplane (1.0 A typical)
External Supply	24V DC (150 mA for bus termination)
Energy Storage	Lithium battery for configuration retention
Battery Life	Approximately 3 years
Dimensions (approx.)	300 mm x 210 mm x 30 mm (double-wide)
Weight	1.05 kg (1050 grams)
Indicators	6 LEDs (power, run, bus A, bus B, fault, redundancy)
Operating Temperature	0°C to 60°C

Functional Features and Processing Capabilities

The ABB Bailey IMMPI02 offloads communication tasks from the main processor. You can connect this module to redundant plant buses for fault tolerance. It automatically switches to the backup bus upon primary bus failure. Furthermore, the module performs data validation and error correction on all messages.

This interface module supports hot standby configurations with automatic failover. The dual-port RAM allows simultaneous access by the processor and plant bus. Additionally, the onboard diagnostics monitor bus health and communication quality. You can replace the module without powering down the entire chassis.

Installation and Configuration Steps

First, insert the ABB Bailey IMMPI02 into a double-wide INFI 90 slot. Next, connect both plant bus cables (Bus A and Bus B) to the rear panel. Then, set the module address using the DIP switches on the front edge. Finally, configure the scan rate and data mapping using CADENCE software.

You must terminate both bus cables at each physical network end. The module does not provide internal termination resistors for the plant bus. Always use the correct termination panels like ABB Bailey INNTP01 at endpoints. Furthermore, verify that the module appears in the controller’s configuration database.

This processor interface works perfectly for large distributed control systems. It pairs with multifunction processors for advanced math and logic tasks. The ABB Bailey IMMPI02 supports up to 2000 data points per module. You can add redundancy by installing two modules in the same chassis.