Safe Brake Control (Sbc) - Siemens SINAMICS S120 Function Manual

Safety Integrated basic functions

9.6 Safe Brake Control (SBC)

9.6 Safe Brake Control (SBC)
The "Safe Brake Control" function (SBC) is used to control holding brakes that function
according to the closed-circuit principle (e.g. motor holding brake).
The command for releasing or applying the brake is transmitted to the Motor Module/Power
Module via DRIVE-CLiQ. The Motor Module / Safe Brake Relay then carries out the action
and activates the outputs for the brake.
Brake activation via the brake connection on the Motor Module / Safe Brake Relay (SBR) /
Safe Brake Adapter (SBA) involves a safe, two-channel method.
Note
SBC for chassis components and Power Modules blocksize
• Chassis components support this function starting from an order number with the ending
• To ensure that this function can be used for Blocksize Power Modules, a Safe Brake
No detection of mechanical defects
"Safe Brake Control" does not detect mechanical defects. The system does not detect
whether a brake is e.g. worn or has a mechanical defect, whether it opens or closes.
A cable break or a short-circuit in the brake winding is only detected when the state
changes, i.e. when the brake either opens or closes.
Functional features of "Safe Brake Control"
● SBC is executed when "Safe Torque Off" (STO) is selected.
● Unlike conventional brake control, SBC is executed via p1215 through two channels.
● SBC is executed regardless of the brake control or mode set in p1215. SBC is not
● The function must be enabled using parameters.
● When the state changes, electrical faults, such as a short-circuit in the brake winding or
582
...xxx3. A Safe Brake Adapter is also needed for this design.
Relay must be used (for more information, see the Equipment Manual).
When the Power Module is configured automatically, the Safe Brake Relay is detected
and the motor holding brake type is defaulted (p1278 = 0).
WARNING
recommended, however, when 1215 = 0 or 3.
wire breakage can be detected.
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions