Siemens Industry Online Support
Siemens AG
Entry type: Application example Entry ID: 24690377, Entry date: 09/08/2017

Wiring and Voting Architectures for failsafe Analog Input Modules (F-AI) of the ET 200M

  • Entry
  • Associated product(s)
Several analog signals shall be monitored failsafe in a plant. Depending on importance and failure risk, there are several options of wiring and voting the signals.
The voting can, for example, be realized in the analog input modules and/or in the CPU. The various possibilities of wiring and voting failsafe signals are illustrated in this application example.

Featured architectures

  • One sensor (1oo1)
  • Two sensors (1oo2) – voting in the F-AI
  • Two sensors (1oo2) – voting in the user program
  • Three sensors (2oo3) – voting  in the user program

  Wiring and Voting for failsafe F-AI (3,8 MB)

Last changes
Improved wording and expansion

Additional keywords
F Systems