Processors: 2x Allen Bradley SLC 5/04 CPUs (1747-L543). Chassis: Allen Bradley 1746-A10 (10-slot SLC 500 chassis). SLC 5/04 CPUs 10-slot rack for SLC 500 system. Legacy SLC 500 installations. Output Modules: 2x Isolated Relay Output Modules (e.g., 1746-OX8, 8-point).
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