Controlling the safety functions
5.3 Control of "STO" and "SS1" via terminals on the Control Unit and the Motor/Power Module
Safety Integrated
Function Manual, 08/2023, A5E03264275A
53
Figure 5-6 Example: Terminals for "Safe Torque Off": Example of Motor Modules Booksize and CU320-2
Grouping drives
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
By appropriately interconnecting the binector input to a joint input terminal for the drives
to be combined to form a group.
2. Switch-off signal path (Motor Module / Power Module)
By appropriately wiring the terminals for the individual Motor Modules / Power Modules
belonging to the group.
Note
Parameterization of the grouping
The grouping must be configured (DI on Control Unit) and wired (EP terminals) identically in
both monitoring channels.
Response of STO for grouping
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).
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.
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