CPU 1515SP PC (F) (+HMI): for applications with higher requirements in terms of program scope and processing speed, for distributed configurations via PROFINET IO or PROFIBUS DP. Especially suitable for solutions with high data volumes, C integration, open Windows applications or integrated HMI. The fail-safe versions of the CPU 1515SP PC also make it possible to control machines or plants in a fail-safe environment. With the fail-safe CPU 1515SP PC F it is possible to address applications which require an SIL3 (Safety Integrity Level) safety class according to IEC 61508 2nd Edition or a PL e (Performance Level) according to ISO 13849.