ABB IEMMU21 Module Mounting Unit

Description

Technical Specifications

Core Identification

• Model: IEMMU21
• Product Type: Rear‑Mount Module Mounting Unit (MMU)
• Compatible Systems: ABB Bailey INFI 90, Net 90 DCS
• Manufacturer: ABB (Bailey Controls)
• Country of Origin: United States, India

Mechanical & Physical

• Module Slots: 12 independent slots for standard INFI 90 modules
• Mounting: Rear‑mount design for 19‑inch (483 mm) standard industrial cabinets
• Backplane: Multilayer PCB assembly with dipshunt sockets, connectors, and jumpers
• Dimensions: 483 mm (W) × 178 mm (H) × 330 mm (D) (19.0″ × 7.0″ × 13.0″)
• Net Weight: 4.9 kg (9 lbs 5 oz)
• Material: Heavy‑gauge sheet metal chassis with aluminum card guides
• Module Retention: Captive fastening latches and precision card guides for secure installation

Power Distribution

• Regulated Output Voltages: +5 V DC, +15 V DC, -15 V DC, +24 V DC
• Power Source: Accepts power from external Modular Power System II (MPS II) units
• Power Distribution: Shared, filtered power to all 12 module slots via backplane
• Overload Protection: Integrated fusing for each voltage rail on the backplane

Communication & Signaling

• Backplane Buses: I/O Expander Bus, Module Bus, Controlway signal distribution
• Signal Integrity: Impedance‑matched PCB design for noise‑immune high‑speed data transfer
• Isolation: Galvanic isolation between field circuits and system backplane

Environmental Ratings

• Operating Temperature: -20 °C to +70 °C
• Storage Temperature: -40 °C to +85 °C
• Humidity: 5–95% RH, non‑condensing
• Vibration/Shock: Complies with IEC 60068‑2‑6 (vibration) and IEC 60068‑2‑27 (shock)
• Protection Rating: IP20 (chassis)

Certifications

• CE Marking
• UL Listed (Industrial Control Equipment)
• Complies with IEC 61010‑1 safety standards
• EMC compliance per IEC 61000‑6‑2 / 61000‑6‑4

Key Features

12‑Slot Modular Capacity

• Accommodates up to 12 INFI 90 modules in a single chassis, maximizing system density.
• Supports mixed configurations of analog I/O, digital I/O, communication, and control modules.
• Hot‑swap compatible modules enable maintenance without full system shutdown.

High‑Performance Backplane

• Multilayer PCB backplane ensures reliable power and signal distribution to all slots.
• Manages three critical communication buses for seamless inter‑module data exchange.
• Pre‑configured dipshunt sockets and jumpers simplify system setup and configuration.

Rear‑Mount Space Optimization

• Rear‑mount design frees valuable front‑panel space in control cabinets for operator interfaces.
• Ideal for retrofitting existing INFI 90 systems or deploying new, space‑constrained DCS setups.
• Standard 19‑inch rack mounting ensures compatibility with industrial cabinet infrastructure.

Robust Industrial Construction

• Heavy‑duty metal chassis withstands harsh industrial vibration and mechanical stress.
• Wide operating temperature range ensures stable performance in extreme environments.
• Captive latches and precision guides guarantee secure module seating and easy installation/removal.

Scalable System Integration

• Seamless integration with ABB Bailey INFI 90 and Net 90 DCS architectures.
• Works in conjunction with Modular Power System II (MPS II) for flexible power management.
• Supports system expansion by cascading multiple IEMMU21 units across a Controlway network.

Simplified Maintenance & Diagnostics

• Modular design allows for quick replacement of individual modules or the entire chassis.
• Clear labeling and accessible connectors reduce troubleshooting time.
• Backplane status indicators provide visibility into power and communication health.

Application Scenarios

Power Generation

• Fossil Fuel Power Plants: Integration into boiler control, turbine control, and auxiliary systems.
• Nuclear Power Plants: Safety‑related DCS infrastructure for reactor control and monitoring.
• Renewable Energy: Wind and solar farm control systems for grid integration and power management.

Oil & Gas Industry

• Upstream Operations: Wellhead control, pipeline monitoring, and production optimization.
• Refineries: Distributed control for distillation, cracking, and hydroprocessing units.
• LNG Facilities: Cryogenic process control and safety instrumented systems (SIS).

Chemical & Petrochemical Processing

• Continuous Process Plants: Control of reactors, separators, and material handling systems.
• Batch Processing: Flexible I/O configurations for pharmaceutical and specialty chemical production.
• Hazardous Areas: Robust chassis design for Class I, Division 2 hazardous location installations.

Metals & Mining

• Smelting & Refining: High‑temperature process control and material handling automation.
• Mining Operations: Conveyor control, ore processing, and mine safety systems.
• Steel Mills: Integration into rolling mills, furnace control, and quality assurance systems.

Water & Wastewater Treatment

• Municipal Water Plants: Control of filtration, disinfection, and pumping systems.
• Wastewater Facilities: Aeration, clarification, and sludge treatment process automation.
• Desalination Plants: Reverse osmosis and distillation process monitoring and control.

Pulp & Paper Manufacturing

• Paper Machines: Control of stock preparation, forming, pressing, and drying sections.
• Pulp Mills: Digester control, bleaching processes, and energy management systems.
• Recycle Lines: Automation of deinking, screening, and cleaning operations.

Food & Beverage Production

• Continuous Processing: Brewery, dairy, and soft drink manufacturing lines.
• Packaging Lines: Integration with filling, capping, and labeling machine control systems.
• Quality Control: Monitoring of temperature, pressure, and flow in critical process stages.

Marine & Offshore

• Shipboard Automation: Engine control, navigation, and cargo handling systems.
• Offshore Platforms: Process control for drilling, production, and utility systems.
• FPSO Vessels: Integrated DCS for floating production, storage, and offloading operations.