Description

Overview

The IMRIO02 is a remote I/O slave interface module designed for ABB Bailey INFI-90 and Network 90 distributed control platforms. It functions as a communication node that collects field-level I/O signals from remote termination units and transfers process data to the central controller through ABB’s proprietary Remote I/O network.

This module is intended for rack-based N-Series installations used in legacy ABB distributed control environments requiring extended I/O reach and stable deterministic communication.

System Role and Function

The IMRIO02 operates as a dedicated remote I/O communication interface within the INFI-90 architecture, supporting:

• Aggregation of distributed analog and digital I/O signals

• Real-time data exchange with the main controller

• System diagnostics reporting for remote I/O segments

• Coordination of multi-drop I/O network communication

• Integration with ABB N-Series rack-based termination hardware

Communication Characteristics

• Protocol: ABB proprietary Remote I/O (RIO) bus

• Network structure: Multi-drop distributed I/O topology

• Data exchange: Cyclic process data plus diagnostic messaging

• Integration scope: INFI-90 / Network 90 control systems

• Compatibility: ABB N-Module rack and field termination assemblies

Electrical Specifications

• Supply voltage: 5 VDC via rack backplane

• Power consumption: approximately 5–8 W typical

• Interface type: High-speed backplane communication connection

• Electrical isolation: Provided at system rack level

Mechanical Construction

• Module format: ABB N-Series plug-in card design

• Installation method: Standard INFI-90 rack slot mounting

• Weight: 0.85 lbs 

• Front panel: LED indicators for module status and communication activity

• Cooling: Passive convection within rack enclosure

Environmental Limits

• Operating temperature: 0°C to 60°C

• Storage temperature: -40°C to 85°C

• Humidity range: 5% to 95% non-condensing

• Designed for continuous industrial duty operation

Application Areas

• Thermal and hydro power generation control systems

• Refinery and petrochemical process automation

• Heavy industrial distributed control systems

• Legacy ABB DCS maintenance and spare part replacement

• Expansion of remote I/O capacity in existing INFI-90 installations

Specifications

• Brand: ABB

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems