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  • High-availability automation system with redundant design.
  • For applications with high fail-safety requirements.
    Processes with high restart costs, expensive downtimes, little supervision, and few maintenance options.
  • Redundant central functions.
  • Increases availability of I/O: switched I/O configuration.
  • Also possible to use I/Os with standard availability: single-sided configuration.
  • Hot standby: automatic reaction-free switching to the standby unit in the event of a fault.
  • Configuration with two separate or one divided central rack.
  • Connection of switched I/O via redundant PROFIBUS DP and/or PROFINET.
Catalog ST 70:

You can also find information about SIMATIC S7-400 in Catalog ST 70: