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Ensuring functional safety
3.7 Safety functions in conjunction with SINAMICS converters
3.7
Safety functions in conjunction with SINAMICS converters
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 SBC function belongs to the Safety Integrated Basic Functions and is available for
SINAMICS S120, S110 and G120 converters (depending on the Control Unit installed).
• The Motor Module / Power Module controls the opening and closing of the brake.
Terminals are available at the device, depending on the particular SINAMICS type and
version. A Safe Brake Relay or a Safe Brake Adapter are required for the safety-related
brake control.
The brake is controlled through a safety-related two-channel data link via the brake
connection on the Motor Module / Safe Brake Relay (SBR) / Safe Brake Adapter (SBA).
The Motor Module/Power Module adopts a controlling function for the "Safe Brake Control"
function: The function ensures that if the Control Unit fails or malfunctions, the brake current
is interrupted, therefore closing the brake.
Safe Brake Test (SBT)
The diagnostic function "Safe Brake Test " (SBT) checks whether a brake provides the required
braking effect (holding torque).
The SBT function belongs to the Safety Integrated Extended Functions and is available for
SINAMICS S120 converters (a Safety Extended License is required).
The Safe Brake Test (SBT) diagnostic function is possible if the drive has a mounted rotary
encoder.
More detailed information is provided in the SINAMICS S120 Safety Integrated Function
Manual (6SL3097-5AR00-0AP3) and in the manual for the specific converter.
Additional information is provided in the SINAMICS Guidelines for handling the Safe Brake
Test (SBT), Article ID: 109782484.
34
SIMOGEAR 2332 - Safety-related brake
Operating Instructions, 11/2021, A5E51390096A/RS-AA
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