Siemens SINAMICS S120 Function Manual page 607

Description of the two-channel structure
The functions are separately selected/deselected for each drive using two terminals.
1. Switch-off signal path, Control Unit (CU310-2/CU320-2)
2. Switch-off signal path, Motor Module / Power Module (with CUA3x or CU310-2)
Both terminals must be energized within the tolerance time p9650, otherwise a fault will be
output.
Figure 10-2 Example: Terminals for "Safe Torque Off": Example of Motor Modules Booksize and CU320-2
Grouping drives (not for CU310-2)
To ensure that the function works for more than one drive at the same time, the terminals for
the corresponding drives must be grouped together as follows:
1. Switch-off signal path
2. Switch-off signal path (Motor Module / Power Module with CUA3x)
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
10.8 Control via terminals on the Control Unit and Motor/Power Module
The desired input terminal is selected via BICO interconnection (BI: p9620[0]).
The input terminal is the "EP" terminal ("Enable Pulses").
The p9620 parameters of all drives that belong to a group are connected with a single DI
(r0722.x) of the CU320-2.
By appropriately wiring the terminals for the individual Motor Modules / Power Modules,
belonging to the group, with CUA31/CUA32.
Safety Integrated basic functions
607