Allen-Bradley 1746-A4 SLC 500 4-Slot Rack Backplane Assembly

The Allen-Bradley 1746-A4 SLC 500 4-Slot Rack Backplane Assembly is a four-slot modular chassis for the SLC 500 family, providing a backplane-based frame to host up to four 1746 I/O modules in a single rack. It is part of the SLC 500 modular chassis lineup that includes 1746-A7, 1746-A10, and 1746-A13 options, offering scalable I/O expansion for small to mid-size control panels. This backplane assembly is designed for use with standard 1746-series I/O modules in SLC 500 configurations, supporting common automation tasks such as digital and analog I/O within a compact enclosure. The chassis helps organize module connections and simplifies wiring for reliably deployed controllers in manufacturing, packaging lines, and other light-to-medium automation environments.