SIPLUS S7-1500 CPU 1511-1 PN -40...+70°C start up -20°C with conformal coating based on 6ES7511-1AK01-0AB0 ! To the left of the CPU, no module can be inserted! . Central processing unit with Work memory 150 KB for Program and 1 MB for data, 1st interface: PROFINET IRT with 2-port switch, 60 ns bit performance, SIMATIC Memory Card required