Allen-Bradley 1756-A17 ControlLogix 17-Slot Chassis

The Allen-Bradley 1756-A17 ControlLogix 17-Slot Chassis is the standard 17-slot backplane enclosure in the ControlLogix family, designed to host a mix of 1756-series modules—processors, I/O blocks, communications cards, and specialty modules—on a single shared backplane. This chassis serves as the core rack for scalable ControlLogix automation, providing inter-module data pathways and power distribution across all 17 slots, so a single rack can support extensive I/O and complex control logic. Part of Rockwell Automation’s ControlLogix ecosystem, the 1756-A17 accepts 1756-series modules that mate with the chassis for centralized control, and it is commonly used in large manufacturing and process automation where many I/O points or advanced processing are required. The 17-slot configuration enables builders to consolidate a broad module mix in one enclosure, simplifying wiring and reducing panel footprint while preserving modularity for future expansion. The family includes variants to accommodate different mounting or installation needs, while remaining compatible with the broader 1756 ControlLogix portfolio and power/CPU options that complete the controller setup.