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

4.1.3

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.
Not e
No S B C f or SINAMICS HLA
SINAMICS HLA does not support Safe Brake Control.
Not e
Cont rolling the brake v ia a relay for "Safe B rake 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 enabled.
Danger to life as a result of undesirable motor motion due to defective brake
"Safe Brake Control" does not detect mechanical defects of the brake.
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 and/or closes. In SINAMICS S120M, a cable
break is only identified when opening the brake.
For devices in chassis format with connected Safe Brake Adapter, the connecting cable
between the Safe Brake Adapter and the motor brake is not monitored for cable break or
short-circuit.
The aforementioned defects may trigger unwanted motor motion, which may result in
physical injury or death.
• In particular, ensure the brake is not powered from an external source. Information on
• During commissioning, test the brake using the Safety Integrated Extended Function
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
WA RNING
this topic can be found in EN 61800-5-2:2007, Appendix D.
"Safe Brake Test (SBT)" (for further information, see Section "Safe Brake Test (SBT)
(Page 132)").
Description of Safety Integrated functions
4.1 Safety Integrated basic functions
71