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ABB Bailey IEMMU21 Module Mounting Unit

Brand:ABB Bailey
Item No.:IEMMU21
Product Origin:USA
Product Dimensions:483 mm × 356 mm × 304 mm
Product Weight:7.5kg
Payment:T/T, Western Union, Credit Card
Goods_stock:15
Shipping Port:Xiamen, China
Lead Time:1-3 Days
Condition:Brand New And Original
Warranty:1 Year
Certificate:COO
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ABB Bailey IEMMU21-3ABB Bailey IEMMU21-1ABB Bailey IEMMU21-2IEMMU21-3

Product Overview

The ABB Bailey IEMMU21 Module Mounting Unit is a rugged industrial chassis designed to securely house and interconnect automation modules used in ABB Bailey Infi 90 Distributed Control Systems (DCS). Acting as both a physical mounting rack and electrical backbone, this unit supports power distribution, signal routing, and module communication in demanding process automation environments. Its robust construction and structured slot architecture make it an essential foundation for reliable control system installations.

Technical Specifications & Physical Details

SpecificationDetails
Model NumberIEMMU21
Module TypeModule Mounting Unit (Backplane Chassis)
System CompatibilityABB Bailey Infi 90 DCS and related module families
Slot CapacitySupports up to 21 standard automation modules
Mounting StyleRear‑installed in standard 19‑inch (483 mm) industrial cabinet
Primary Power Input120/240 VAC or 24/48 VDC (system‑dependent)
Regulated OutputsProvides +5 VDC, ±15 VDC, +24 VDC to installed modules
Operating Temperature0 °C to 70 °C
Storage Temperature−40 °C to +85 °C
Humidity Range5 % to 95 % non‑condensing
Dimensions (H × W × D)483 mm × 356 mm × 304 mm (19″ × 14″ × 12″)
WeightApprox. 7.5 kg (16.5 lb)


Industrial Applications

The IEMMU21 is widely used in automation systems where high module density and reliability are needed:

  • Distributed Control System (DCS) racks in process automation

  • Large control panels in oil & gas, petrochemical and refining facilities

  • Power generation and utility automation cabinets

  • Water/wastewater process control systems

  • Manufacturing automation with distributed I/O requirements

  • Retrofit and modernization projects in legacy ABB Bailey installations

By offering a structured platform for numerous control and I/O modules, this unit enhances system scalability and simplifies engineering layout.


Key Advantages

  • High Slot Capacity – Accommodates up to 21 automation modules for complex control systems

  • Integrated Backplane Power & Communication – Ensures reliable intermodule signaling and voltage distribution

  • Industrial‑Grade Construction – Durable chassis and backplane suited for continuous plant service

  • Standard Rack Mounting – Designed for seamless installation in 19‑inch industrial cabinets

  • Scalable Architecture – Supports expansion as system demands grow

These attributes make the IEMMU21 well‑suited for high‑density control applications where space and reliability are both priorities.


Technical FAQs

  1. What is the role of the IEMMU21?
    It serves as a chassis and backplane for mounting and integrating automation modules in Infi 90 DCS installations.

  2. How many modules can it support?
    Up to 21 standard modules depending on system configuration.

  3. What power inputs does it accept?
    Primary power can be 120/240 VAC or 24/48 VDC, based on system design.

  4. What regulated voltages does it supply to modules?
    Outputs include +5 VDC, ±15 VDC, and +24 VDC for connected modules.

  5. Is it compatible with modern ABB systems?
    It is designed for Infi 90 systems; integration with newer ABB platforms requires appropriate interfaces.

  6. Can modules be hot‑swapped?
    Module insertion and removal usually follow power‑down procedures unless the system supports live change.

  7. What environments is the unit rated for?
    Industrial temperatures from 0 °C to 70 °C with broad humidity tolerance.

  8. Does it support communication pathways between modules?
    Yes — the printed circuit backplane provides electrical and logical routing for installed modules.

  9. Is maintenance required?
    Periodic visual inspection and dust control are recommended; otherwise, routine servicing is minimal.

  10. What type of cabinet does it install in?
    Standard 19‑inch (483 mm) industrial control cabinets.


Sales and Business Development

Phone: +8617350837383
E-mail: [email protected]
Skype: +8617350837383
WhatsApp: +8617350837383
Business hours: We Provide Online Support 24/7
Address: Room 1001, Jiuzhou Commercial Building, Xiamen, Fujian Province, China

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