Allen-Bradley 51050004 PCA Card Rack Expansion Chassis

The 51050004 PCA Card Rack Expansion Chassis is a metal, multi-slot enclosure designed to mount and organize PCB boards and expansion cards within electronic control and expansion systems. Commonly used in industrial automation equipment, telecommunications systems, instrumentation racks, and custom assemblies where modular circuit boards require mechanical support and centralized backplane connections. Key specs include its form factor as a Multi-Slot Expansion Chassis, mounting as a rack or panel, construction as a metal chassis assembly, and the Manufacturer Part Number 51050004 with alternate part numbers 410500001 and 4105000. Compatibility depends on the host system and installed cards, and the status is legacy with limited public documentation available.