Siemens SINAMICS G120 - Safe Brake Control (SBC)

3.7.2 Safe Brake Control (SBC)
What is the effect of the SBC safety function?
An inverter equipped with the SBC function monitors the cables to an electromagnetic brake
and when requested, safely shuts down the 24 V control of the brake.
You must supplement the inverter with a Safe Brake Relay for the SBC function.
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The brake can be integrated in the motor or externally mounted.
Table 3-3 An overview of the principle of operation of SBC
Safe Brake Control (SBC) Standard brake function
1. When the STO function is active, the inverter requests the SBC
function via the connecting cable to the Safe Brake Relay.
The Safe Brake Relay safely switches off the supply voltage
for the connected brake.
The brake closes.
2. The inverter signals "STO is active" via a fail-safe digital output
or via PROFIsafe.
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Figure 3-2 The principle of operation of SBC
The SBC function is not able to identify as to whether the brake is mechanically worn, for
example.
Description
3.7 An overview of the principle of operation of the safety functions
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
34 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD