ABB IEMMU11 Infi 90 Module Mounting Unit

Product Overview

The IEMMU11 is a front-mount module mounting unit engineered for distributed control architectures within ABB Infi 90 and Symphony control environments. Rather than performing control or signal processing, this unit provides the structural framework and mechanical interface required to install and support standard Infi 90 system modules inside industrial control cabinets.

Designed as a cabinet-mounted chassis, the IEMMU11 ensures correct module alignment, reliable connector engagement, and long-term mechanical stability in demanding plant environments. It is commonly selected for new system builds as well as modernization projects replacing earlier mounting platforms.

Functional Role

The IEMMU11 (Module Mounting Unit) acts as a physical carrier for Infi 90 OPEN system modules and Harmony bridge controllers. It supports secure insertion and retention of control cards while maintaining consistent spacing, airflow, and accessibility for maintenance.
This unit is frequently deployed as a direct replacement for earlier mounting assemblies, enabling upgrades without altering cabinet layouts or field wiring.

Mechanical Design and Construction

The chassis is fabricated from industrial-grade metal to withstand vibration, thermal cycling, and long service intervals. Its front-mount configuration allows technicians to install and service modules directly from the cabinet face, improving accessibility during commissioning and troubleshooting.

The enclosure geometry is optimized for compatibility with standard 19-inch control cabinets and rack systems commonly used in ABB DCS installations.

Technical Specifications

General Characteristics

• Product Type: Infi 90 Module Mounting Unit

• Mounting Style: Front-mount cabinet installation

• Function: Mechanical housing and module support

• Manufacturer: ABB

Physical Parameters

• Dimensions: 48.3 cm × 17.8 cm × 25.4 cm

• Weight: 4.0 kg

• Construction Material: Industrial steel chassis

Environmental Limits

• Operating Temperature Range: −20 °C to +60 °C

• Intended Environment: Indoor control cabinets

• Protection Level: Dependent on cabinet enclosure rating

Compliance and Classification

• HS Code: 853710

• Typical Certifications: CE, UL, CSA (system-dependent)

System Compatibility

The IEMMU11 is designed for seamless integration with ABB distributed control system components, including:

• Infi 90 OPEN system modules

• Harmony Bridge Controller platforms

• Symphony Enterprise control architectures

Its mechanical footprint allows straightforward replacement of earlier mounting units such as IEMMU01 and IEMMU02, reducing retrofit effort and downtime.

Typical Applications

This mounting unit is widely used in continuous and discrete process environments where ABB DCS platforms are deployed, including:

• Power generation and auxiliary systems

• Oil, gas, and petrochemical processing

• Chemical production facilities

• Pulp and paper mills

• Large-scale industrial process control cabinets

Frequently Asked Questions

Q: Does the IEMMU11 provide control or signal processing functions?
A: No. The IEMMU11 is strictly a mechanical mounting and integration unit. All control and communication functions are performed by the installed Infi 90 or Harmony modules.

Q: Can this unit replace older Infi 90 mounting assemblies?
A: Yes. The IEMMU11 is commonly used as a replacement for earlier ABB mounting units while preserving cabinet layouts and module compatibility.

Q: Is power distribution integrated into this model?
A: Power handling depends on the specific system configuration. The IEMMU11 itself serves as a mounting platform and does not act as an active power supply.