This module mounting unit provides a secure mechanical foundation for installing I/O modules and controllers. It simplifies the integration of multiple electronic components within a standard 19-inch cabinet. The IEMMU11 accommodates up to 12 single-width modules in a single horizontal row.
Core Technical Specifications
The unit measures 48.3 x 13.3 x 22.0 centimeters and weighs approximately 3.8 kilograms when fully populated. Its cold-rolled steel construction offers excellent rigidity and long-term dimensional stability. The mounting chassis features twelve guided slots with integrated ejector levers for each position. Furthermore, the unit includes a built-in DIN rail for mounting auxiliary power supplies and terminal blocks. It supports modules with 6U height and 4HP or 8HP width formats.
Connectivity and Backplane Design
The rear panel houses a passive backplane with 96-pin connectors for each module slot. This backplane provides both power distribution and high-speed data communication pathways. Additionally, the IEMMU11 includes two 24 V DC input terminals for redundant power feeding. A dedicated grounding bus bar runs along the bottom edge for noise reduction. Engineers can easily route field wiring through the top and bottom cable ducts.
Thermal Management and Power Distribution
An integrated fan tray with three 80-mm fans provides forced-air cooling across all installed modules. This cooling system delivers an airflow rate of 85 cubic feet per minute. The unit distributes up to 150 W of total power across its twelve slots evenly. Moreover, the IEMMU11 incorporates thermal sensors that trigger an alarm at 65°C. These sensors protect sensitive electronics from overheating during high-load conditions.
Mechanical Durability and Installation Flexibility
The chassis uses a powder-coated finish that resists corrosion and scratches in industrial environments. It fits directly into standard EIA 19-inch racks with four front-mounting screws. The operating temperature range spans -5°C to +55°C with 90% non-condensing humidity tolerance. Furthermore, the IEMMU11 supports both horizontal and vertical mounting orientations for layout optimization.
Technical Parameters Summary
| Parameter | Specification |
|---|---|
| Model | ABB IEMMU11 |
| Module Capacity | 12 x single-width (4HP) or 6 x double-width (8HP) |
| Supported Height | 6U |
| Dimensions (W x H x D) | 48.3 x 13.3 x 22.0 cm |
| Weight (empty) | 2.4 kg |
| Weight (full) | 3.8 kg (approx.) |
| Backplane Connector | 96-pin DIN per slot |
| Power Input | 2 x 24 V DC (redundant) |
| Total Power Capacity | 150 W |
| Cooling Fans | 3 x 80 mm, 85 CFM total |
| Thermal Alarm | 65°C trigger point |
| Grounding Bus | Integrated, M6 stud |
| Material | Cold-rolled steel, powder-coated |
| Finish Color | RAL 7035 (light gray) |
| Operating Temperature | -5°C to +55°C |
| Certifications | CE, UL 508 |
Application Scenarios and System Integration
This mounting unit serves as the backbone for ABB’s S800 and S900 I/O families. It enables quick module replacement without powering down the entire subsystem. The unit’s passive backplane design minimizes single points of failure. System integrators appreciate the clear labeling and color-coded slot identifiers.
Summary
The IEMMU11 offers a robust and versatile mounting solution for industrial automation subsystems. Its generous capacity, efficient cooling, and redundant power inputs ensure dependable operation. This unit provides the mechanical infrastructure that modern control cabinets demand.
Details
| Weight | 2.4 kg |
|---|---|
| Dimensions | 483 × 133 × 220 mm |
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