Allen-Bradley 1746-A7 Chassis Rack 7-Slot SLC 500

Allen-Bradley 1746-A7 is a 7-slot SLC 500 mounting chassis designed to serve as the backbone of a modular SLC 500 control system. The rack provides seven single slots for installing I/O modules, expansion adapters, or a processor, with the processor occupying slot 0 and leaving six slots available for additional I/O modules. This 1746-A7 chassis is part of Allen-Bradley’s SLC 500 modular hardware style, and multiple chassis can be linked to form larger configurations using expansion cables such as the 1746-C9. Catalog number 1746-A7 identifies the 7-slot chassis within the SLC-500 family, and its design supports the range of SLC 500 components that fit into standard single-slot locations. The 1746-A7 is commonly used in setups that require a compact, mixed-slot rack for combining CPU, I/O, and communication modules within a single enclosure, enabling scalable expansion by adding additional 1746 series chassis as needed.