General
The central processing units (CPUs) are the heart of the SIMATIC S7-1500. They execute the user program and network the controller with other automation components.
The following CPUs are available:
CPU-1511-1 PN for small to medium applications
CPU-1513-1 PN for medium applications
CPU 1515-2 PN for medium to large applications
CPU-1516-3 PN/DP for exceptionally demanding applications and additional communication tasks
CPU 1518-4 PN/DP for high-performance applications and shortest reaction times
CPU 1516F-3 PN/DP for demanding standard and fail-safe applications
CPU 1518F-4 PN/DP for demanding standard and fail-safe applications with very high requirements