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The CPU supports a broad S7 communication environment and uses the S7-400 bus for its operating supply. Before replacement, retain the STEP 7 project, firmware level, memory card, interface parameters and I/O configuration. Once the validated project is restored, examine the diagnostic buffer, communication resources, process image and every affected control sequence before the rack returns to operation.
Important Notice: Confirm the complete 6ES7417-4XT05-0AB0 order number, firmware, memory card and installed interface-module arrangement before exchange.
The first document contains the applicable manufacturer reference pages for this exact product; the second organizes preparation, wiring, diagnostics and handover checks.