In combination with the safety-related automation systems of the SIMATIC PCS 7 process control system, the safety-related electronics modules of SIMATIC ET 200pro can be used to implement safety applications. The safety-related digital inputs record the signal statuses from safety-related sensors, and generate corresponding safety telegrams for the automation system. Depending on the safety telegrams of the automation system, the safety-related digital outputs trigger safe shut-down procedures. They are also responsible for monitoring short-circuits and cross-circuits up to the actuator. The safe communication with the automation systems is carried out over PROFIBUS with PROFIsafe.

All modules are certified up to SIL 3 (IEC 61508) and Cat. 4 (EN954-1).