Allen-Bradley 1746-A13 SLC 500 Series Rack Chassis

The Allen-Bradley 1746-A13 is a 13-slot modular rack chassis for the SLC 500 family, designed to mount a backplane and up to 13 plug-in modules in a single enclosure. It is paired with a 1746-P3 power supply (28.8 V DC input) to power the rack backplane and installed modules, a common configuration documented in SLC 500 chassis datasheets. This chassis provides the frame and backplane for SLC 500 processors and I/O modules, enabling compact control panels and industrial automation racks that require a scalable mix of CPU, analog, and digital I/O cards. As part of the SLC 500 modular hardware ecosystem, the 1746-A13 is widely cataloged alongside other 1746-series racks and power supplies, offering a straightforward path to building, expanding, or replacing a modular PLC system. The 13-slot design is a defining feature that supports a modular approach to control architecture, allowing technicians to consolidate multiple I/O types in a single chassis and simplify wiring and maintenance.