In many areas of automation technology, there is a continually increasing demand for the availability and thus the fail-safety of the automation systems. There are areas where a plant standstill can result in extremely high costs. Here, only redundant systems can do justice to the availability requirements.

The high-availability SIMATIC S7-400H meets these requirements. It continues to operate even when parts of the controller have failed due to one or more faults. The availability thus achieved makes the SIMATIC S7-400H especially suitable for the following application areas:

• Processes with high restart costs following a controller failure.
• Processes with expensive standstill times.
• Processes involving valuable materials.
• Processes in which no data must be lost in the event of an error.
• Unsupervised applications.
• Applications with reduced maintenance personnel.

Ordering data

The ordering data of the components for the S7-400H can be found with the relevant modules under "S7-400/S7-400H/S7-400F/FH".