ABB IEMMU11 IEMMU12 IEMMU21 IEMMU22 IEMMU01 IEMMU02 NFTP01 IEPMU01 IEPMU02 Mounting Units & Panels

Product Overview

ABB Harmony Rack systems use specialized mounting hardware to organize control modules, input/output modules and communication interfaces within industrial control cabinets. The mounting assembly is an important part of the system infrastructure because it provides physical support and, in compatible configurations, internal backplane connections.

ABB documentation identifies IEMMU11, IEMMU12, IEMMU21 and IEMMU22 as Harmony Rack module mounting units. These assemblies accommodate applicable rack-mounted modules and distribute internal communication connections and logic power through the backplane.

Other related components perform separate tasks. IEMMU01 and IEMMU02 are legacy mounting unit references, while NFTP01 is a field termination panel. IEPMU01 and IEPMU02 are power mounting unit references and should be selected according to the installed power system.

Although these nine references are grouped on one purchasing page, their applications and physical configurations are not identical. Always verify the manufacturer’s part number and relevant installation instructions before selecting a replacement.

Available ABB IEMMU Module Mounting Unit Models

Technical note: The table provides identification guidance, not complete mechanical or electrical specifications. Consult the applicable ABB manuals before installation.

ABB IEMMU11 Module Mounting Unit Features

Harmony Rack Module Support

Harmony Rack module mounting units provide an organized location for compatible control, I/O and communication interface modules. Their role is to support the physical installation of these modules within an approved cabinet arrangement.

The appropriate mounting unit must match the installed system. A similar-looking chassis may have a different mounting orientation or power distribution configuration.

Backplane Communication Connections

ABB describes the module mounting unit backplane as routing Controlway, the I/O Expander Bus and logic power to supported rack modules. These internal connections form part of the Harmony Rack communication architecture.

For maintenance and replacement projects, customers should confirm that the replacement hardware matches the original backplane and module arrangement.

Front and Rear Mounting Options

The IEMMU11 and IEMMU21 are rear-mount configurations. The IEMMU12 and IEMMU22 are front-mount configurations. This distinction affects how the mounting unit is positioned within the control cabinet.

Cabinet layout, maintenance access and existing installation hardware should be considered when selecting a model. Mounting orientation should not be changed without reviewing the applicable system documentation.

Primary Power Distribution

The IEMMU11 and IEMMU12 configurations include primary power distribution. The IEMMU21 and IEMMU22 configurations are identified without primary power distribution.

This is an important difference for spare parts procurement. Buyers should verify the power distribution arrangement of the installed cabinet before placing an order.

Legacy IEMMU01 and IEMMU02

IEMMU01 and IEMMU02 are older module mounting unit references found in legacy ABB Bailey installations. These units may be encountered during maintenance, refurbishment and control system spare parts identification.

When a newer mounting unit is being considered as a replacement, the complete original configuration must be reviewed. Compatibility should not be inferred solely from the product family name.

NFTP01 Field Termination Panel

The NFTP01 Field Termination Panel provides mounting support for compatible termination units. ABB documents it separately from the module mounting unit because termination equipment and rack modules have different installation roles.

Customers sourcing NFTP01 should identify the installed termination units and cabinet configuration. The NFTP01 is not a replacement for an IEMMU module mounting chassis.

IEPMU01 and IEPMU02 Power Mounting Units

IEPMU01 and IEPMU02 are related ABB Bailey power mounting unit references. Their function differs from the module mounting units and the NFTP01 termination panel.

Before ordering either model, verify the exact part number and applicable power system documentation. Electrical ratings, wiring arrangements and interchangeability should not be assumed without manufacturer confirmation.

Industrial Applications

ABB Harmony Rack mounting hardware is relevant to industrial facilities that operate compatible ABB Bailey distributed control systems. Procurement requirements often arise during planned maintenance, cabinet refurbishment and spare parts replacement.

• Power Generation: Maintenance of compatible Harmony Rack control cabinets.
• Oil and Gas: Replacement planning for installed process control equipment.
• Chemical Processing: Procurement of approved DCS mounting hardware.
• Pulp and Paper: Support for established ABB Bailey automation systems.
• Water and Utilities: Maintenance of existing control system infrastructure.
• Industrial Manufacturing: Spare parts planning and control cabinet refurbishment.

These are general industry examples rather than guarantees of compatibility. Each product must be checked against the actual equipment and system requirements.

Model Selection and Purchasing Guide

Step 1: Identify the Original Part Number

Check the installed equipment label, spare parts list or maintenance documentation. Record the complete reference, including any additional ordering information or hardware revision.

Step 2: Confirm the Required Product Function

Determine whether the project requires a module mounting unit, a field termination panel or a power mounting unit. These components perform different tasks and should not be treated as direct substitutes.

Step 3: Review Mounting Requirements

For IEMMU11, IEMMU12, IEMMU21 and IEMMU22, check the mounting orientation and primary power distribution requirement. For legacy IEMMU01 and IEMMU02 hardware, review the original cabinet configuration before selecting a replacement.

Step 4: Verify Associated Equipment

Identify the installed controllers, I/O modules, communication interfaces, termination hardware and power system components. These details help determine which mounting assembly is appropriate for the existing installation.

Step 5: Request a Model-Specific Quotation

Provide the exact part number, quantity, shipping destination and preferred delivery schedule. If available, include a photograph of the original product label. Request confirmation of condition, warranty, lead time and the specific hardware being offered.

Why Choose Wuhan Yuli Automation?

Wuhan Yuli Automation Technology Co., Ltd. is an industrial automation supplier serving international customers. Our product portfolio includes ABB Harmony controllers, communication modules, I/O hardware, power supplies and supporting automation components.

We help customers prepare model-specific purchasing inquiries for maintenance and replacement projects. Buyers can submit several related part numbers in one request while specifying the quantity required for each item.

Our published commercial offering focuses on new, original products with at least a one-year warranty. Exact product condition, availability, warranty terms, packaging and delivery details remain subject to formal quotation and order confirmation.

Explore related equipment on our ABB Harmony BRC Bridge Controller product page.

For manufacturer reference information, consult the official ABB Harmony Rack I/O Product Overview.

Frequently Asked Questions

What is the ABB IEMMU11 Module Mounting Unit?

IEMMU11 is a Harmony Rack module mounting unit used with compatible ABB Bailey control system hardware. It is identified as a rear-mount configuration with primary power distribution.

What is the difference between IEMMU11 and IEMMU12?

Both configurations include primary power distribution. IEMMU11 is rear-mounted, while IEMMU12 is front-mounted.

What is the difference between IEMMU21 and IEMMU22?

Both are configurations without primary power distribution. IEMMU21 is rear-mounted and IEMMU22 is front-mounted.

Are IEMMU01 and IEMMU02 legacy products?

Yes. They are legacy module mounting unit references associated with older ABB Bailey installations. Replacement selection requires verification of the installed configuration.

What is the NFTP01 used for?

NFTP01 is a field termination panel for mounting compatible termination units. It performs a different function from an IEMMU module mounting unit.

Are IEPMU01 and IEPMU02 interchangeable?

Interchangeability should not be assumed. Confirm the complete model reference and the applicable power system requirements before selecting either unit.

How can I request a quotation?

Contact Wuhan Yuli Automation with the exact model, quantity, shipping destination and any relevant hardware revision details. We can provide a quotation based on confirmed supply information.

Request a Quote