4.2.2 Safe Brake Control (SBC)
Overview
The "Safe Brake Control" function (SBC) is
used to safely control the motor-integrated
holding brake.
The holding brake opens as soon as voltage is
available - and closes when in the no-voltage
state.
Functional features
In order that SBC can become active you must enable the function when commissioning the
system.
Note
SBC cannot be selected as an autonomous function; however, if it is enabled, it is activated
at the same time that STO is selected.
The holding brake is controlled using the encoder integrated in the motor.
Applications
SBC can be used wherever a safe position must be maintained even with a de-energized
motor, in order to prevent suspended or passing loads from dropping (e.g. lifting gear,
passenger elevators, winders). No external logic or switching elements required, as the
functionality is completely integrated in the drive.
Note
Condition of the motor holding brake
SBC is not able to identify as to whether a holding brake is mechanically worn or is a defective.
As a consequence, observe the maximum permissible number of emergency braking
operations for the motor holding brake being used.
Safety functions integrated in the drive
4.2 Basic Functions
SINAMICS S210 servo drive system
Operating Instructions, 12/2017, A5E41702836B AA 61
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