Leuze MSI-SR4 Safety Relay, 24VAC/DC 100mA

The Leuze MSI-SR4 is a compact safety relay module designed for safety-related control applications. It provides reliable monitoring of safety circuits such as emergency stop buttons, safety doors, and light curtains. The relay ensures high functional safety levels in compliance with international standards for industrial machinery. Technical Specifications: Manufacturer: Leuze Electronic GmbH + Co. KG Model Number: MSI-SR4 Product Type: Safety Relay Module Function: Monitors and controls safety inputs to trigger safe stop or power-off functions in hazardous situations Rated Supply Voltage: 24V AC/DC (20.4–27.6V operating range) Power Consumption: <3W typical Input Channels: Dual-channel inputs for safety devices (redundant monitoring) Safety Outputs: 3 safety relay outputs (NO contacts, positively driven) Auxiliary Output: 1 monitoring output (NC contact for status signaling) Rated Output Current: 3A per safety output (resistive load) Response Time: ≤25 ms typical Safety Category: Cat. 4 / PL e according to EN ISO 13849-1 SIL Rating: SIL 3 according to IEC 61508 Insulation Voltage: 250V between input and output circuits Indicators: LED indicators for power, channel status, and output state Connection Type: Plug-in screw terminals for 0.2–2.5 mm² (AWG 24–14) wires Mounting Type: DIN rail (35 mm standard rail) Housing Material: Polycarbonate (PC) flame-retardant enclosure Ambient Temperature Range: -10°C to +55°C (14°F to 131°F) Protection Rating: IP20 (for installation inside control cabinet) Applications: Emergency stop monitoring, guard door control, two-hand safety operations, and safety interlock systems Certifications: CE, cULus, TÜV, and BG certified Dimensions (Approximate): 22.5 mm (W) × 100 mm (H) × 120 mm (D) Manufacture Country: Germany Please review pictures carefully and let us know if you have any questions!