Siemens SINAMICS S150 - Activating SBC Via the Safe Brake Adapter; Activating SBC Via the Safe Brake Adapter for Option K88 (230 V AC)

Controlling the safety functions
5.4 Activating "SBC" via the Safe Brake Adapter
Safety Integrated
88 Function Manual, 08/2023, A5E03264275A
5.4 Activating "SBC" via the Safe Brake Adapter
5.4.1 Activating "SBC" via the Safe Brake Adapter for option K88 (230 V AC)
Description
The Safe Brake Control (SBC) is a safety function which 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 when current flows (=low active).
The Safe Brake Adapter 230 VAC is installed in the factory in the cabinet unit. Power is
connected to terminal -X12 on the Safe Brake Adapter. A connection between the Safe Brake
Adapter and the Control Interface Module is established in the factory so that the Safe Brake
Adapter can be controlled.
For controlling the brake, a connection must be established on the plant side between
terminal -X14 on the Safe Brake Adapter and the rectifier of the brake. Direct connection of
AC brakes is not permissible.
Fast de-energization
Some brake rectifier types feature two additional connections for switching the brake load on
the DC side. This allows the brake coil to be quickly de-energized, i.e. the braking effect starts
earlier.
The Safe Brake Adapter supports such fast de-energizing using the two additional
connections -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 closes for a machine a
cceptance, the fast de-
energization must be bypassed by short-circuiting the terminals at -X15:1, 2.