Transponder switch set STS 0110 Different applications require different implementations with regard to the existing tamper protection. The safety switches of the STS series always offer the right solution with 3 different coding variants. Coded: The safety switch accepts any STS actuator. Full-coded: The safety switch only accepts the trained STS actuator. Unique: The safety switch only accepts the supplied STS actuator. It is not possible to teach an STS actuator. Applications