The SBC function is controlled and monitored by the SINAMICS Drives firmware. The control and feedback signal regarding the switching state of the SBA relay is realized via terminals of the Control Interface Module (CIM). The excitation coil of the holding brake is connected directly at the SBA.

For SINAMICS G130 chassis units and SINAMICS S120 Chassis Format Units, the brake supply voltage must be connected externally at the SBA.

Connection example of a Safe Brake Adapter SBA