Safe Brake Adapter Sba 230 V Ac (Option K88) - Siemens SINAMICS G150 Operating Instructions Manual

4.10.28

Safe Brake Adapter SBA 230 V AC (option K88)

Description
Safe Brake Control (SBC) is a safety function that is used in safety-related applications. 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).
The Safe Brake Adapter 230 VAC is installed in the cabinet unit in the factory. An infeed is
connected to terminal -X12 on the Safe Brake Adapter for the power supply. For control, a
connection is established between the Safe Brake Adapter and the Control Interface Module
via a cable harness installed in the factory.
For controlling the brake, a connection must be established on site between terminal -X14 on
the Safe Brake Adapter and the rectifier of the brake. Direct connection of AC brakes is not
permissible.
NOTICE
Device failure caused by connecting a 24 VDC brake
When a 24 VDC brake is connected to option K88 (Safe Brake Adapter 230 VAC) this can
damage the Safe Brake Adapter and cause the device to fail (when the brake closes this is
not displayed on an LED, the fuses can then rupture, the relay contact service life is
reduced).
• Do not connect a 24 VDC brake to the 230 VAC Safe Brake Adapter.
Note
Maximum cable length of the brake control
The maximum permissible cable length of 300 m between the Safe Brake Adapter 230 VAC
and the brake must be observed. To accurately calculate the maximum cable length, see the
SINAMICS Low Voltage Configuration Manual on the customer DVD supplied with the
device.
Fast de-energization
Some brake rectifier types 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-energizing using the two additional
connections -X15:1 and -X15:2. This function does not belong to safe brake control.
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
Electrical installation
4.10 Other connections
177