Siemens SINAMICS S120 Function Manual page 379

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Grouping drives (not for CU310)

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 (CU320)

● 2. switch-off signal path (Motor Module/Power Module with CUA3x)"

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 (drive 1 and

2) and group 2 (drive 3 and 4).

For this purpose, the same grouping for "Safe Torque Off" must be performed on both the

Control Unit and the Motor Modules.

Drive functions

Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5

9.7 Control signals by way of terminals on the Control Unit and Motor/Power Module

By connecting the binector input to the joint input terminal on the drives in one group.

By appropriately wiring the terminals for the individual Motor Modules/Power Modules

with CUA31/CUA32 assigned to the group.

The grouping must be identical in both monitoring channels.

If a fault in a drive results in a "Safe Torque Off" (STO), this does not automatically mean

that the other drives in the same group also switch to "Safe Torque Off" (STO).

Safety Integrated basic functions