CPU 412-1 for S7-400 racks
The 6ES7412-1XF00-0AB0 is a SIMATIC S7-400 CPU 412-1 central processing unit with a multi-point MPI interface and 48 KB of working memory. It is classified as a mature product in its lifecycle, meaning it is no longer in active forward production but remains available through independent sourcing channels against an RFQ.
What the 48 KB working memory means
The 48 KB working memory is the runtime memory for user program execution and data. It determines how much logic and how many tags the CPU can handle before hitting a capacity wall — enough for a medium-sized machine cell or a small process skid, not a multi-rack line.