Use SIMATIC Safety with S7-1200F and TIA Portal
http://www.siemens.com/simatic-safety
SIMATIC Safety Integrated is the seamless integration of machine safety in the SIMATIC automation system. The system, comprising both hardware and software, offers the advantage of having the safety functions already built in, so no second, additional system is needed.
Savings on hardware and engineering. A perfect match between safety and machine design