Configuration versions for safety-related systems shown by example of SIMATIC PCS 7 with S7-400FH controllers

Thanks to the flexible, scalable fault tolerance of Safety Integrated (Flexible Modular Redundancy™, FMR), the degree of redundancy can be defined separately for each architecture layer, controller, fieldbus and I/O devices, and matched to the field instrumentation. This enables you to realize custom, fault- tolerant architecture perfectly adapted to the task at hand. It not only provides a higher degree of availability than is possible with conventional redundancy architecture, it also enables comparatively more attractive, cost-effective safety applications since the FMR provides redundancy only where it is needed.