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 (starting with article numbers ending with ...3). 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.
Note
Controlling the brake via a relay for "Safe Brake Control":
If you use the "Safe Brake Control (SBC)" function, the use of relays/contactors can cause
faults in the brake control when brakes are switched. For this reason, this type of control is
not generally permissible.
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. This can result in death and serious
injury.
• To detect mechanical defects, use the "Safe Brake Test (SBT)" Safety Integrated
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
WARNING
Extended Function. Detailed information can be found in the "SINAMICS
Safety Integrated Function Manual".
Safety Integrated Basic Functions
10.6 Safe Brake Control (SBC)
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