The SBT function performs a test of the brake function at cyclical intervals.
The intended function of wear-prone brakes is safely tested by increasing torque against the closed brake. Two brakes can be tested with different test torques on each drive, e.g. motor brake and external brake.
The SBT function is suitable for implementing a safe brake combined with the SBC function.
The function identifies faults or wear in the brake mechanics. Automatically testing the effectiveness of brakes reduces maintenance costs and increases the safety and availability of plants/machines. The SBT function goes beyond the safety functions named in IEC 61800-5-2.