SIPLUS S7-1500 CPU 1511F-1 PN based on 6ES7511-1FL03-0AB0 with conformal coating -40...+60 °C . central processing unit with work memory 450 KB for program and 1.5 MB for data, 1st interface: PROFINET IRT with 2-port switch, 25 ns bit performance, SIMATIC Memory Card required.