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- ABB Bailey
- NMMU02
- Module Installation Unit
- Sweden (SE)
- 220 × 90 × 100 mm
- 3.63 kg
- Xiamen, China
- New & In Stock
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- 1 Year
- 1-3 Working Days
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The ABB Bailey NMMU02 Module Installation Unit is a rack-mounted chassis used in ABB Bailey INFI 90 / Net 90 Distributed Control Systems (DCS). It provides the physical structure, backplane connectivity, and power distribution framework for installing multiple control system modules.
This unit is designed to support controllers, I/O modules, communication modules, and interface modules, ensuring stable mechanical mounting and seamless system-level integration within industrial automation cabinets.
The NMMU02 is commonly used in legacy ABB Bailey DCS installations, especially in power generation, petrochemical, and large-scale process control environments.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB (Bailey) |
| Model | NMMU02 |
| Product Type | Module Installation Unit / Chassis Rack |
| System Compatibility | ABB Bailey INFI 90 / Net 90 DCS |
| Function | Module mounting and system backplane support |
| Dimensions | 220 × 90 × 100 mm |
| Weight | 3.63 kg |
| Installation Type | Rack-mounted chassis |
| Module Capacity | Multiple DCS modules (controller, I/O, communication) |
| Backplane Type | Integrated industrial communication backplane |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Range | 5%–95% non-condensing |
Function and Working Principle
The NMMU02 functions as a central mounting and interconnection platform for ABB Bailey control modules.
It provides a structured rack where modules can be securely installed. Once inserted, each module connects directly to the internal backplane, which distributes both power supply and communication signals between all installed units.
This eliminates the need for external wiring between modules and ensures fast, reliable communication across the system.
The chassis also supports modular expansion, allowing additional control capacity to be added without redesigning the system architecture.
Role in Industrial Control Systems
Within ABB Bailey INFI 90 / Net 90 systems, the NMMU02 performs key structural roles:
- Provides mechanical mounting for DCS modules
- Enables backplane-based module communication
- Distributes system power to installed modules
- Supports modular expansion of control systems
- Ensures stable cabinet-level system architecture
It is a fundamental infrastructure component in ABB Bailey distributed control systems.
Industrial Applications
The ABB NMMU02 is widely used in:
- Power generation control systems
- Oil and gas processing facilities
- Petrochemical plants
- Water treatment systems
- Industrial automation systems
- ABB Bailey legacy DCS installations
- Large-scale process control environments
Installation and System Integration
- Installed inside industrial control cabinets
- Mounted on standard rack structures
- Supports multiple ABB Bailey modules simultaneously
- Requires proper grounding and electrical safety configuration
- Installed by qualified control system engineers
- Integrated into INFI 90 / Net 90 system architecture
Compatible System Components
- ABB Bailey NMFC / NMFP controller modules
- ABB Bailey NLIM / NLIS communication modules
- ABB Bailey NLSM loop storage modules
- ABB Bailey NGCM gateway modules
- I/O modules (NIAI, NIDI, NIDO series)
- DCS backplane system components
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| NMMU02 | Module installation unit | Standard rack chassis | DCS module integration |
| NMMU01 | Earlier chassis version | Basic mounting structure | Legacy systems |
| IEMMU01 | Enhanced mounting unit | Improved system integration | INFI 90 setups |
| IEMMU02 | Advanced mounting unit | Higher module support | Complex DCS systems |
| NMMU series | Modular rack platform | Scalable architecture | Large automation systems |
Key Advantages
- Stable mechanical support for DCS modules
- Enables clean backplane communication structure
- Reduces external wiring complexity
- Supports scalable system expansion
- Ensures reliable module integration
- Designed for continuous industrial operation
- High durability in harsh environments
Technical FAQs
Q1: What is the main function of NMMU02?
It provides a chassis for installing ABB Bailey control and I/O modules.
Q2: Does it process signals?
No. It only provides mounting and backplane connectivity.
Q3: What systems use NMMU02?
It is used in ABB Bailey INFI 90 and Net 90 distributed control systems.
Q4: Why is it important?
It forms the structural foundation for modular DCS architecture.
Conclusion
The ABB Bailey NMMU02 Module Installation Unit is a critical structural component in ABB Bailey distributed control systems. It provides mechanical mounting, power distribution, and communication backplane connectivity for multiple industrial control modules.
It is widely used in power plants, petrochemical facilities, and large-scale automation systems where modular structure and system stability are essential for reliable long-term operation.