Allen-Bradley 1746-PI 7-Slot Rack Backplane is the electrical backbone for a seven-slot SLC 500 rack, designed to live in the 1746-A7 chassis and provide the interconnections that let a CPU and I/O modules communicate and share power across the backplane. In standard SLC 500 configurations, slot 0 is reserved for the processor or a network adapter, while slots 1 through 6 accommodate I/O modules. This backplane is part of the SLC 500 modular hardware family, enabling reliable expansion of Allen-Bradley automation systems by linking the CPU, I/O, and communication modules through the rack’s backplane.
