Common engineering system for basic process control system and safety instrumented system

The process industry frequently features complex technological sequences with high safety demands, and faults and failures in the process automation could have fatal consequences for personnel, machines, plants and the environment. Therefore process safety is of particular significance. The safety technology used must reliably detect errors in the process and also its own internal errors, and automatically set the plant/application to a safe state if an error is detected.

S7 F/FH Systems is the comprehensive range of products and services from Siemens for safe, fault-tolerant applications in the process industry. This is characterized by:

• Safe communication via PROFIBUS with PROFIsafe
• Safe communication also via PROFIBUS PA with PROFIsafe
• ET 200 distributed I/O systems with safety-related I/O modules
• User-friendly process visualization, including safety-relevant fault messages, via the optional operator system
• Engineering system with S7 F Systems software package and SIMATIC Safety Matrix
• AS 412F/FH, AS 414F/FH and AS 417F/FH safety-related automation systems
  The safety-related automation systems of the S7 F/FH-System are based on the hardware of the CPU 412H, CPU 414H or CPU 417H automation systems that are extended with the S7 F Systems software package to include safety functions. All F/FH systems listed are TГњV-certified and comply with the safety requirements up to SIL 3 according to IEC 61508. There are two design variants:
  • Single-channel (with one CPU, safety-related)
  • High-availability (with redundant CPUs, safety-related and fault-tolerant)