SIMATIC S7-1500H, CPU 1517H-4 PN, central processing unit with 4 MB work memory for program and 50 MB for data, 1st interface: PROFINET RT with 2-port switch, 2nd interface: PROFINET, with 2-port switch, 3rd interface: PROFINET, 4th/5th interface: H-SYNC, SIMATIC Memory Card required