What Are Fail-Safe Automation Systems And Fail-Safe Modules - Siemens SIMATIC S7-1500 System Manual

2.3

What are fail-safe automation systems and fail-safe modules?

Fail-safe automation systems
Fail-safe automation systems (F-systems) are used in systems with higher safety
requirements. F-systems control processes and ensure that they are in a safe state
immediately after shutdown. In other words, F-systems control processes in which an
immediate shutdown does not endanger persons or the environment.
Safety Integrated
Safety Integrated is the integrated safety concept for automation and drive technology from
Siemens.
Proven technologies and systems from automation technology, such as the S7-1500
automation system described here, are used for safety engineering. Safety Integrated
includes the complete safety sequence, ranging from sensor, actuator and fail-safe modules
right through to the controller, including safety-related communication via standard
fieldbuses. Drives and controllers handle safety tasks in addition to their actual functions.
Fail-safe m odules
Fail-safe modules (F-modules) differ from non-fail-safe modules in that they internally
monitor themselves and their sensor and actuator lines for faults and enter the safe state
when faults are detected.
The F-CPU communicates with a fail-safe module via the safety-related PROFIsafe bus
profile.
Application area of S7-1500/ET 200MP with fail-safe I/O modules
By using S7-1500 automation systems / ET 200MP distributed I/O systems with fail-safe
I/O modules, you replace the conventional safety engineering technical setup. This includes
replacing, for example, switching devices for emergency stop, protective door monitors,
two-hand operation, etc.
Automation system
System Manual, 09/2016, A5E03461182-AD
2.3 What are fail-safe automation systems and fail-safe modules?
System overview
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