Siemens SINAMICS S120 Function Manual page 82

Description of Safety Integrated functions
4.1 Safety Integrated basic functions
2-channel brake control
Note
Connecting the brake
The brake cannot be directly connected to the Motor Module in chassis format. A Safe Brake
Adapter is also required.
The brake is controlled from the Control Unit. Two signal paths are available for applying the
brake.
Figure 4-2
The Motor / Power Module carries out a check to ensure that the "Safe Brake Control"
function is working properly and ensures that, if the Control Unit fails or is faulty, the brake
current is interrupted and the brake applied.
The brake diagnosis can only reliably detect a malfunction in either of the switches (TB+, TB-
) when the status changes, i.e. when the brake is released or applied.
If the Motor Module or Control Unit detects a fault, the brake current is switched off. The
brake then closes and a safe state is reached.
80
2-channel brake control, blocksize (example)
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated