Core Features Multi-Function Safety Control for Industrial Safety Systems: Functions as a certified industrial safety relay designed to monitor and control safety-related circuits (e.g., emergency stops, light curtains, door interlocks) in 24V DC industrial systems. It integrates 8 normally open (NO) safety outputs and 1 normally closed (NC) auxiliary output, supporting complex safety configurations to meet EN ISO 13849-1 PLd (Performance Level d) and SIL 2 (Safety Integrity Level 2) requirements—critical for protecting personnel and equipment in manufacturing environments. Emergency Stop (E-Stop) & Safety Input Monitoring: Features dedicated inputs for monitoring emergency stop buttons, safety gates, or light curtains, with dual-channel input redundancy to prevent single-point failures. It detects input faults (e.g., open circuits, short circuits) and immediately de-energizes safety outputs to stop hazardous machinery, ensuring compliance with EN 60947-5-5 standards for safety control devices. Compact Design & Flexible Integration: Features a slim, DIN-rail mountable form factor (35mm standard DIN rail) with a width of only 45mm—optimized for space-constrained control cabinets. It supports tool-free screw terminal wiring (accepts 0.5–2.5mm² cables) and clear labeling for safety/auxiliary terminals, simplifying installation and reducing wiring errors. Additionally, it includes a built-in manual reset function to restore safety circuits after a fault, ensuring controlled restart of machinery. Industrial Durability & Reliable Operation: Built for harsh industrial conditions, with an IP20 protection rating (IEC 60529) to shield internal components from dust and accidental contact. It operates reliably in temperatures from -25°C to +60°C, suitable for cold warehouses, warm production floors, or high-humidity environments. It also resists vibration (10–500Hz, 30m/s² per IEC 60068-2-6) and shock (1000m/s² per IEC 60068-2-27), maintaining safety functionality in high-vibration setups (e.g., stamping machines). Status Monitoring & Diagnostic Capabilities: Integrates multi-color LED indicators to provide real-time safety circuit status: Green LED: Power-on and normal operation. Red LED: Safety fault (e.g., E-Stop activation, input short circuit). Yellow LED: Auxiliary output active. These indicators enable quick troubleshooting of safety circuits, reducing downtime and ensuring compliance with safety audit requirements. Typical Applications The Phoenix Contact PSR-SPP-24UC-ESAM4-8X1-1X2 2963996 is engineered for industrial safety circuit control—ideal for scenarios where personnel and equipment safety depend on reliable monitoring of emergency stops and safety interlocks—with core use cases including: Manufacturing Machinery Safety Control: Monitors emergency stop buttons and safety gate interlocks on production line machinery (e.g., conveyor systems, robotic arms). It de-energizes 8 safety outputs to stop machinery immediately upon E-Stop activation, complying with EN ISO 13849-1 PLd requirements for machinery safety. Light Curtain & Area Guard Monitoring: Integrates with safety light curtains (e.g., Phoenix Contact PSENopt) to protect access to hazardous machine zones (e.g., CNC machine work areas). The dual-channel input redundancy ensures no single fault bypasses the safety circuit, meeting SIL 2 standards for functional safety. Packaging & Material Handling Safety: Controls safety circuits for packaging machines or material handling equipment (e.g., forklift barriers). The 1 NC auxiliary output triggers alarms or upstream process shutdowns when a safety fault occurs, preventing secondary hazards—complying with EN 60204-1 standards for electrical equipment of machines. Automotive Assembly Line Safety: Manages safety interlocks for automotive assembly stations (e.g., welding booths, paint lines). The compact design fits in dense control cabinets, while status LEDs enable maintenance teams to quickly resolve safety faults and minimize production downtime—complying with IATF 16949 standards for automotive quality management.