The SICK RLY3-OSSD100 is a compact safety relay module designed to process signals from safety devices with OSSDs (Output Signal Switching Devices). It acts as an interface between safety sensors (e.g., light curtains, safety switches) and machinery controls, ensuring safe shutdown of equipment when a hazard is detected. This module is critical for achieving compliance with machinery safety standards (e.g., ISO 13849, IEC 62061).