SINAMICS Safe brake relay for Power Module With SINAMICS S120 released as of V2.6! Safe Brake Relay SINAMICS Safe Brake Relay for Power Modules with SINAMICS S120 for modular SINAMICS G120 converters and SINAMICS S110 servo converters. The Safe Brake Relay allows the Power Module to be safely connected to an electromechanical motor brake. This allows the brake to be directly and safely controlled from the CU250S-2 Control Unit in accordance with IEC 61508 SIL 2 and EN ISO 13849-1 PL d and Category 3. The scope of supply of a Safe Brake Relay includes the following: two cable harnesses for connection to the CTRL socket of the Power Module – 0.32 m long for frame sizes FSA to FSC and – 0.55 m long for frame sizes FSD to FSF. SINAMICS – simply my drive.