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

10.6

Safe Brake Control (SBC)

The "Safe Brake Control" function (SBC) is used to safely control holding brakes that
function according to the closed-circuit principle (e.g. motor holding brake).
The opening and closing of the brake is controlled by the Motor Module / Power Module.
Terminals are available for this on the device in booksize format. A Safe Brake Relay is also
required for the "Safe Brake Control" in the blocksize format. A Safe Brake Adapter is
required in the chassis format (as of an order number with the ending ...xxx3). When the
Power Module is configured automatically, the Safe Brake Relay is detected and the motor
holding brake type is defaulted (p1278 = 0).
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
No SBC for SINAMICS HLA
SINAMICS HLA does not support Safe Brake Control.
No detection of mechanical defects
"Safe Brake Control" does not detect mechanical defects. The system does not detect
whether a brake, for example, is worn or has a mechanical defect, whether it opens or
closes.
A wire breakage or a short-circuit in the brake winding is only detected when the state
changes, i.e. when the brake either opens or closes.
To detect mechanical defects, use the "Safe Brake Test (SBT)" Safety Integrated Extended
Function. Detailed information can be found in the "SINAMICS Safety Integrated Function
Manual".
Functional features of "Safe Brake Control"
● SBC is executed when "Safe Torque Off" (STO) is selected.
● In contrast to conventional brake control, SBC is executed via 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
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
WARNING
recommended, however, when 1215 = 0 or 3.
wire breakage can be detected.
Safety Integrated basic functions
10.6 Safe Brake Control (SBC)
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