Siemens 6ES7510-1SK03-0AB0 SIMATIC DP, CPU 1510SP F-1 PN for ET 200SP, central processing unit with 300 KB work memory for program and 1 MB for data, 1st interface: PROFINET IRT with 3-port switch, bit performance 6 ns, SIMATIC memory card required, BusAdapter required for ports 1 and 2