Allen-Bradley 1746-A10 SLC 500 Card Rack 10 Slot

The Allen-Bradley 1746-A10 SLC 500 10-Slot Modular Chassis is a backplane-based expansion rack for the SLC-500 family, designed to hold a processor or I/O adapter in slot 0 and up to nine additional I/O modules in slots 1–9. As a 10-slot chassis, it provides the interconnections, mounting framework, and backplane required to form a compact, scalable SLC-500 control system, and is cataloged by Rockwell Automation as the 1746-A10 10-slot chassis for modular expansion. In typical configurations, the processor occupies slot 0, while the remaining slots accommodate single-slot I/O modules or adapters that support a range of digital and analog I/O, communications, and specialty modules compatible with the SLC-500 ecosystem. Common applications include small to mid-size manufacturing lines, packaging, and automated material handling, where a single rack provides CPU plus a tailored mix of I/O, enabling straightforward expansion without replacing the controller.