Product number (marketing number) 6ES7516-3AN02-0AB0 Product description SIMATIC S7-1500, CPU 1516-3 PN/DP, central processing unit with main memory 1MByte for program and 5MByte for data, 1st interface: PROFINET IRT with 2-port switch, 2nd interface: PROFINET RT , 3rd interface: PROFIBUS, 10 ns Bit high performance, requires SIMATIC memory card