PRODUCT INFORMATION
Product Overview
The ABB IEMMU21 MMU21 is a Module Mounting Unit designed for the Bailey INFI 90 process control system. This chassis houses and interconnects functional cards across standard automation cabinets. It provides dedicated backplane slots to accommodate various system processing and communication hardware. The unit delivers internal signal routing and power distribution across all installed modules.
The assembly uses a rear-mount card chassis configuration for installation in standard industrial enclosures. Its internal backplane structure supports the Module Bus, Controlway, and I/O-Expander Bus networks. Operating power rails distribute regulated plus 5 V, plus 15 V, and minus 15 V lines. This physical layout allows modular maintenance while maintaining clean wiring termination paths.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Mounting Style | Rear-mount card chassis |
|---|
| Module Capacity | Up to 12 system modules (or 10 system modules + 2 power modules) |
|---|
| Supply Voltages Provided | +5 V, +15 V, –15 V (regulated) for logic and module bus |
|---|
| Backplane Supports | I/O-Expander Bus, Module Bus, Controlway & signal distribution |
|---|
| Chassis Dimensions (approx.) | 483 mm × 178 mm × 330 mm (≈ 19.02 in × 7.01 in × 12.99 in) |
|---|
| Weight (approx.) | 4.2 kg (≈ 9.3 lb) |
|---|
TECHNICAL INFORMATION
Features
- Accommodates up to 12 system modules or 10 system modules plus two power modules.
- Features an integrated backplane supporting Module Bus, Controlway, and I/O-Expander Bus signal distribution.
- Delivers regulated supply lines of +5 V, +15 V, and -15 V.
- Utilizes a rear-mount chassis profile measuring approximately 483 mm by 178 mm by 330 mm.
TECHNICAL INFORMATION
Applications
- Bailey INFI 90 distributed control system enclosures.
- Housing process controllers, communication modules, and power supply cards.
- Signal routing across I/O expander and module bus architectures.
TECHNICAL INFORMATION
Connections / Interfaces
- Module Bus backplane interface.
- Controlway communication channels.
- I/O-Expander Bus interface.
TECHNICAL INFORMATION
Installation Guidelines
- Secure the rear-mount card chassis directly into compatible cabinet racking.
- Allow adequate clearance around the chassis for cable routing and thermal dissipation.
- Verify chassis grounding before connecting module bus lines or turning on power supplies.
TECHNICAL INFORMATION
Compatibility
- Compatible with ABB Bailey INFI 90 system modules and standard power units.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with ABB Bailey INFI 90 system modules and standard power units.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the module capacity of the ABB IEMMU21 MMU21 chassis?
The unit holds up to 12 system modules, or 10 system modules with two power modules.
Which backplane communication protocols does the IEMMU21 support?
The backplane supports the I/O-Expander Bus, Module Bus, Controlway, and internal signal distribution lines.
What is the reference price for the ABB IEMMU21 MMU21?
Market reference pricing is approximately 690.00 USD for refurbished condition. Figures are indicative market reference pricing only and not a final quotation.
