Siemens SINAMICS S120 Function Manual page 699

The assignment is checked during the test for the switch-off signal paths. The operator
selects "Safe Torque Off" for each group. The check is drive-specific.
Example: Terminal groups
It must be possible to select/deselect "Safe Torque Off" separately for group 1 (drives 1 and
2) and group 2 (drives 3 and 4). For this purpose, the same grouping for "Safe Torque Off"
must be realized both for the Control Unit and the Motor Modules.
Figure 10-3 Example: Grouping terminals with Motor Modules Booksize and CU320-2
Information on the parallel connection of chassis type Motor Modules
When chassis type Motor Modules are connected in parallel, a safe AND element is created
on the parallel drive object. The number of indexes in p9620 corresponds to the number of
parallel chassis components in p0120.
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
10.8 Control via terminals on the Control Unit and Motor/Power Module
Safety Integrated Basic Functions
699