Siemens SINAMICS S120 Function Manual page 54

Extended Functions
4.9 Forced dormant error detection
Forced dormant error detection F-DI/F-DO of TM54F through test stop
An automatic test stop function is available for forced dormant error detection within the
F-DI/DO test.
In order to be able to utilize the TM54F test stop function, all F-DIs used must be
interconnected as shown in the wiring example in the SINAMICS S120 GH1 Equipment
Manual. The digital inputs of F-DI 0 to F -DI 4 must be connected to the "L1+" power supply.
The digital inputs of F-DI 5 to F -DI 9 must be connected to the "L2+" power supply.
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Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Safety Integrated