Series B requires firmware 13.40 or later and RSLogix 5000 version 13.04.00 or later. Replacement acceptance therefore joins catalog and series verification with project backup, slot restoration, firmware compatibility and controlled I/O testing.
Important Notice: preserve the complete 1756-L61 Series B identity, controller project, firmware revision, chassis slot, network configuration and CompactFlash record before replacement.
The documents separate exact product evidence from the field sequence for identity, isolation, installation, verification and controlled handover.