6ES7516-3UN00-0AB0 SIMATIC S7-1500TF, CPU 1516TF-3 PN/DP, Central processing unit with 1.5 MB RAM for program and 5 MB for data, 1st interface: PROFINET IRT with 2-port switch, 2nd interface, Ethernet, 3rd interface, PROFIBUS, 10 ns bit performance