IEMMU11 | 12-Slot Module Mounting Unit | ABB Infi 90

Product Description

System Hardware Infrastructure Overview

The IEMMU11 (Model: IEMMU11) is a critical structural component of the ABB Bailey Infi 90 Distributed Control System (DCS). Engineered as a high-density Module Mounting Unit (MMU), the IEMMU11 (Part Number: IEMMU11) provides the mechanical framework and electrical interface required to house and interconnect functional modules such as processors, I/O interfaces, and communication units. This front-mounting version is designed for standard 19-inch cabinet integration, ensuring that modules are securely seated against the system bus (Plant Loop or Controlway) while maintaining optimal alignment for cooling and cable management. Its rugged industrial-grade construction is built to withstand the thermal and mechanical stresses found in continuous-process control environments.

Detailed Technical Specifications

The IEMMU11 (IEMMU11) provides a standardized environment for module synchronization and power distribution.

• Manufacturer: ABB / Bailey

• Model Number: IEMMU11

• System Family: Infi 90, Symphony Harmony

• Mounting Configuration: Front-access mounting (Standard 19-inch Rack)

• Module Capacity: Supports up to 12 slots (Typical configuration: 10 functional modules + redundant power/comm)

• Backplane Integration: Compatible with standard Infi 90 bus structures

• Material Composition: Heavy-duty anodized aluminum frame with reinforced high-temp polymers

• Cooling Design: Open-frame architecture for vertical convection and forced-air cooling

• Dimensions (Standard): 400 mm x 320 mm x 65 mm (15.75 x 12.6 x 2.56 inches)

• Net Weight: 1.6 kg (3.5 lbs)

• Environmental Rating: Designed for Cabinet-level IP20 protection

• Grounding: Integrated chassis grounding points for EMI/RFI shielding

Structural Reliability and Installation Integrity

• Precision Alignment: The IEMMU11 (IEMMU11) utilizes precision-machined guide rails that ensure every module's multi-pin connector aligns perfectly with the backplane, preventing pin damage during hot-swapping or maintenance.

• Bus Protection: The rigid frame prevents PCB flexing, which is essential for maintaining the integrity of high-speed data transfers across the Controlway.

• Versatile Connectivity: The unit is designed to facilitate both front-side module insertion and rear-side cable termination, providing clear separation between logic hardware and field wiring.

Industrial Application Scenarios

• Central Control Rooms: Primary housing for Multi-Function Processors (MFP) in thermal power plant control cabinets.

• DCS Expansion Projects: Adding additional I/O capacity to existing Symphony Harmony systems by installing new MMU racks.

• Legacy System Modernization: Replacing worn or damaged original Bailey mounting units to ensure reliable electrical contact for aging modules.

• Marine & Offshore: Providing a vibration-resistant mounting platform for automation controllers on maritime vessels.