Siemens SINAMICS S120 Function Manual page 206

Control of the safety functions
5.2 Control signals by way of terminals on the Control Unit and Motor / Power Module
Description of the two-channel structure
The functions are separately selected/deselected for each drive using two terminals.
● Switch-off signal path, Control Unit (CU310-2/CU320-2)
The desired input terminal is selected via BICO interconnection (BI: p9620[0]).
● Switch-off signal path, Motor Module / Power Module (with CUA3x or CU310-2)
The input terminal is the "EP" terminal ("Enable Pulses").
Both terminals must be energized within the tolerance time p9650, otherwise a fault will be
output.
Figure 5-1 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
Connect the p9620 parameters of all drives that belong to a group with a single DI
(r0722.x) of the CU320-2.
2. Switch-off signal path (Motor Module / Power Module with CUA3x)
Wire the terminals for the individual Motor Modules / Power Modules, belonging to the
group, with CUA31/CUA32.
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Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated