The part number **24561-R** typically refers to a specific series of **VME/VXI Subrack Components** or horizontal rail extrusions manufactured by **Schroff (nVent)**. These components are fundamental to the structural integrity of electronic modular cabinets and server racks. ### Product Overview: 24561-R Series The 24561-R series consists of **horizontal rails** used to build subracks or cases that house PCBs (Printed Circuit Boards). They are designed to meet international standards for electronics packaging (IEC 60297-3-101). --- ### Technical Specifications | Feature | Description | | :--- | :--- | | **Material** | Extruded Aluminum (Anodized) | | **Standard** | IEEE 1101.1 / 1101.10 | | **Compatibility** | VME, VXI, CompactPCI, and PXI systems | | **Mounting** | Pre-drilled for M2.5 or M3 screws | | **Usage** | Front, Rear, or Center rail positioning | --- ### Key Components & Variations The suffix following "24561-" determines the specific type of rail and its length (expressed in HP - Horizontal Pitch). 1. **Type R (Rugged/Heavy Duty):** * Designed for high mechanical loads. * Features a double-screw fixing points for increased stability. 2. **Conductive Layers:** * Most versions feature a clear chromate finish or are conductive to ensure proper **EMC (Electromagnetic Compatibility)** grounding when the modules are plugged in. 3. **The "Z" Rail:** * Often used for mounting backplanes or connectors. --- ### Application Areas * **Industrial Computing:** Building custom rack-mount PCs. * **Telecommunications:** Housing switching and routing cards. * **Aerospace & Defense:** Ruggedized enclosures for signal processing. * **Test & Measurement:** Creating PXI/VXI instrument chassis. --- ### Installation Note When assembling a subrack using 24561-R rails, it is critical to use **threaded inserts** or **perforated strips** inside the rail groove. This allows for the secure mounting of guide rails and front panels.