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. he 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 involves a
safe, two-channel method.
Note
• Chassis components support this function from an order number with the ending ...xxx3.
• To ensure that this function can be used for Blocksize Power Modules, a Safe Brake
"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 e.g. a short-circuit in the brake winding
Enabling the "Safe Brake Control" function
The "Safe Brake Control" function is enabled via the following parameters:
● p9602 SI enable safe brake control (Control Unit)
● p9802 SI enable safe brake control (Motor Module)
The "Safe Brake Control" function cannot be used until at least one safety monitoring
function has been enabled (i.e. p9601 = p9801 ≠ 0).
470
A Safe Brake Adapter is needed in addition 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.
or wire breakage can be detected.
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions