SIPLUS S7-1500 CPU 1516F-3 PN based on 6ES7516-3FP03-0AB0 with conformal coating -40...+60 °C . central processing unit with work memory 3 MB for program and 7.5 MB for data 1st interface: PROFINET IRT with 2-port switch, 2nd interface: PROFINET RT, 3rd interface: PROFIBUS, 6 ns bit performance, SIMATIC Memory Card required.