Siemens 3SF5401-0AA02 Single Module Safety Relay

Siemens 3SF5401-0AA02 is a single-module safety relay designed for Profibus-based safety circuits, part of Siemens' 3SF family of safety relays. Marketed specifically as a Profibus single module, this device is intended for integration in industrial automation safety architectures to monitor safety inputs and provide a safe output in networked control systems, enabling coordinated responses between PLCs, field devices, and safety interlocks. As a Siemens part, the 3SF5401-0AA02 supports use in safety-related control applications to help ensure reliable, fail-safe operation of machinery when connected to a Profibus network, delivering deterministic safety signaling within a modular automation stack. In practice, technicians deploy this module to implement safety logic across vendor equipment in production lines, supporting emergency-stop, safety gate, and interlock scenarios within a networked safety architecture. For exact electrical specifications, contact configurations, and certification details, consult the official Siemens product literature and catalog entries for the 3SF5400-series and model 3SF5401-0AA02 to ensure correct integration and compliance with your application requirements.