Product Overview

The IEMMU11 is a fundamental structural component of the ABB Bailey Infi 90 and Harmony Rack (HR) Series systems, serving as the primary Module Mounting Unit (MMU). This chassis-level hardware provides the mechanical framework and backplane connectivity necessary to house and power various control and I/O modules. Precision-engineered for high-density environments, the IEMMU11 ensures that the modules are aligned correctly with the system bus, facilitating reliable data communication across the Distributed Control System (DCS). Its heavy-duty construction is designed to mitigate vibration and provide a stable electrical ground, which is essential for maintaining the integrity of sensitive process control signals.

Mechanical Integrity and Hardware Configurations

The IEMMU11 is built for longevity and secure module retention, featuring a design that prioritizes both accessibility and environmental shielding.

• Chassis Construction: High-strength alloy steel for maximum structural rigidity.

• Module Capacity: Designed to support standard Infi 90 rack-mount modules.

• Protection Rating: Engineered to meet IP67 standards for dust and moisture resistance in sealed configurations.

• Securing Mechanism: Integrated mechanical locking bars to prevent module dislodgement in high-vibration zones.

• Physical Footprint: 33.0cm x 17.8cm x 48.3cm.

• Unit Weight: 4.0 kg.

• Cooling Architecture: Optimized airflow paths for passive heat dissipation from mounted electronics.

Strategic Industrial Implementations

As the backbone of the Harmony Rack architecture, the IEMMU11 is deployed in mission-critical infrastructure where hardware failure is not an option. In thermal and nuclear power plants, it houses the primary controllers and communication interfaces that manage turbine synchronization and boiler safety. It is equally indispensable in large-scale petrochemical refineries and pulp and paper mills, providing a centralized and protected environment for the I/O modules that monitor volatile process variables. The unit’s robust sealing and corrosion-resistant finish make it suitable for installation in control rooms located near harsh processing areas, ensuring that the internal control logic remains shielded from external industrial contaminants.