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Amit Pandey
Asked:21 Nov 2025

SIMATIC S7-400 / S7-400H / S7-400F /FH: Fail Safe Platform Authorization key

Dear All,
I want to configure fail safe system. I have S7-400 H (412-5H PN/DP) and Fail-safe IO. Kindly guide me which license and software I need to consider for Fail system.
Waiting for uregent reply,
Regrads,
Yogendra

#sosflex #SIMATIC S7-400 / S7-400H / S7-400F /FH #siemens
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Answers(1)
Siemens Test Added an Answer on21 Nov 2025

Configuring a Fail-Safe System with S7-400H (412-5H PN/DP) and Fail-Safe IO

Dear Yogendra,

To configure a fail-safe system with your S7-400H CPU (412-5H PN/DP) and Fail-safe IO, you'll need specific licenses and software. Here's a breakdown:

  • STEP 7 Professional (TIA Portal): Essential for programming and configuring the fail-safe system.
  • Safety Integrated License: This is mandatory for using fail-safe functions. The specific license depends on the number of fail-safe IO points you intend to use. See Siemens Support article for details on license selection.
  • Safety Matrix (in STEP 7): Used to define the safety functions and their configuration.
  • Fail-Safe IO Configuration: Configuration data for your specific Fail-safe IO modules will be required within the STEP 7 project.

Important Considerations:

  • Ensure your S7-400H CPU firmware is up-to-date for optimal compatibility.
  • Refer to the Siemens documentation for your specific Fail-safe IO modules for detailed configuration instructions.

For urgent support and specific license quotes, please visit SiePortal.

Sincerely,
Siemens Self Support

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