Chassis and Racks provide the structural backbone and electrical backplane for modular control systems. The architecture consists of high-strength frames with integrated power distribution buses and communication slots designed to house CPUs and I/O modules. Technical characteristics include varying slot densities, grounding lugs for noise reduction, and rugged mounting ears for cabinet installation. Functionally, the chassis enables high-speed data exchange between modules via a passive or active backplane, ensuring physical stability and electrical connectivity. This modular framework allows for easy system expansion and maintenance, providing the centralized environment necessary for high-performance machinery protection and process automation hardware.