Safe Brake Adapter Optional Module; Description - Siemens SINAMICS S120 Equipment Manual
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Supplementary system components and encoder system integration
9.4 Safe Brake Adapter optional module
9.4
Safe Brake Adapter optional module
9.4.1
Description
The Safe Brake Adapter (SBA) is required to implement Safe Brake Control (SBC) in
conjunction with Power Modules in the chassis format.
The Safe Brake Control (SBC) is a safety function, that is used in safety-related applications,
e.g. in presses or in rolling mills. In the no-current state, the brake acts on the motor of the
drive using spring force. The brake is released (opened) when current flows through it (=low
active).
Power must be connected to terminal X12 on the Safe Brake Adapter.
For controlling the brake, a connection must be established between terminal X14 on the
Safe Brake Adapter and the motor holding brake.
For the control, a connection must be established between the Safe Brake Adapter and the
Control Interface Module.
The cable harness with article number 6SL3060-4DX04-0AA0 can be used.
Fast de-energization
In some cases, DC brakes are operated with an upstream brake rectifier (230 VAC input
side) for fast de-energization. Some brake rectifiers are equipped with two additional
connections for switching the brake load on the DC side. This allows the brake coil to be
quickly de-energized, i.e. braking starts earlier.
The Safe Brake Adapter supports such fast de-energization via the two additional
connections for X15.1 and X15.2. This function does not belong to safe brake control.
Note
Determination of the time until the brake engages without fast de-energization
As the fast de-energization is not part of the safety function, this functionality is not
monitored. The fast de-energization can therefore fail during operation without being noticed.
Therefore, to determine the time until the brake engages for a machine acceptance, the fast
de-energization must be bypassed by short-circuiting the terminals at X15.1 and X15.2.
342
Manual, 06/2019, 6SL3097-5AL00-0BP1
AC Drive
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