The SIMATIC S7-400FH automation systems ensure highest plant availability (Flexible Modular Redundancy) and a consistent, efficient safety concept in plants with high safety requirements (Process Control of Critical Systems).

Safe and fault-tolerant controllers monitor themselves autonomously and detect faults. When a fault occurs they immediately switch to/remain in safe mode or, in the event of a hardware failure, automatically switch over to the redundant system.

The SIMATIC S7-400FH automation systems offer the unique Flexible Modular Redundancy. This means you benefit from the high flexibility of choosing the redundancy levels to fit the Safety Instrumented Function (SIF). Single, dual, triple and any other I/O configuration can be used.

Benefits of the high-availability systems from Siemens:
	Different safety requirements, one solution for applications up to SIL 3
	More flexibility and reduction of stock-keeping thanks to the possibility to separate or combine safety and standard applications in one CPU
	High flexibility with Flexible Modular Redundancy, Mix and Match to meet the goals of the application
	High availability due to the automatic switchover to the redundant hardware without loss of data, should a hardware failure occur
	Easier and less wiring due to the parallel use of PROFIsafe on PROFIBUS for safety communication
	Easier handling thanks to the use of one engineering tool with the standard Siemens programming environment STEP 7, CFC and Safety Matrix
	The full integration capability into SIMATIC PCS 7 gives you one platform for control and safety, including the complete functionality of PCS 7
	Easy operation and maintenance with the integrated, improved diagnostic functions

Product overview:
SIMATIC S7-400FH	SIMATIC ET 200M