Safe Brake Control (Sbc) - Siemens SINAMICS G120 Function Manual

Description

3.8 Safe Brake Control (SBC)

3.8 Safe Brake Control (SBC)
How does the SBC safety function work?
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.
The brake can be integrated in the motor or externally mounted.
Table 3- 3 The principle of operation of SBC
Safe Brake Control (SBC)
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.
2. The inverter signals that "STO is
active" via a safety output or via the
PROFIsafe safe communication.
The safety-related brake control does not mean that the brake keeps the load in position.
The SBC function is not able to identify as to whether the brake is mechanically worn, for
example.
30
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Standard brake functions
The brake closes.
The brake maintains the motor
shaft in position.
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Function Manual, 04/2014, FW V4.7, A5E34261271B AA