{"product_id":"siemens-sirius-safety-relay-basic-unit-3no-1nc-110-240vac-dc","title":"Siemens Sirius Safety relay, basic unit, 3NO + 1NC, 110 - 240VAC\/DC","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3SK1111-1AW20 is a basic safety-relay from the SIRIUS 3SK1 series. It is designed to monitor safety circuits (e.g. emergency-off, safety-door, or protective-guard interlocks) and to reliably provide safety switching outputs — making it suitable for machine safety, safeguarding enclosures, and emergency-stop systems according to industrial safety standards. The module offers multiple enabling outputs and a signalling contact, allowing safe and controlled switching of potentially hazardous machine circuits.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSafety relay — SIRIUS 3SK1 standard basic unit\u003c\/li\u003e\n\u003cli\u003eSupply voltage (Us): 110–240 V AC\/DC, 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003eSafety enable outputs: 3 × NO contacts (safety-related enabling circuits)\u003c\/li\u003e\n\u003cli\u003eSignalling output: 1 × NC contact (non-safety signalling circuit)\u003c\/li\u003e\n\u003cli\u003eSupports protective-door monitoring, monitored or automatic start, and EMERGENCY-OFF \/ E-Stop functions\u003c\/li\u003e\n\u003cli\u003eScrew-terminal connections for reliable and secure wiring\u003c\/li\u003e\n\u003cli\u003eNarrow housing: width 22.5 mm — compact DIN-rail mounting\u003c\/li\u003e\n\u003cli\u003eFront-panel slide-switch for function selection and two LEDs for status indication \/ diagnostics\u003c\/li\u003e\n\u003cli\u003eFinger-safe terminals (enclosure rated IP20) — safe for enclosed control cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 3SK1111-1AW20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e SIRIUS 3SK1 safety relay, standard basic unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply Voltage (Us):\u003c\/strong\u003e 110–240 V AC \/ DC, 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Enabling Outputs:\u003c\/strong\u003e 3 × NO (normally open) contacts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignalling Output:\u003c\/strong\u003e 1 × NC (normally closed) contact (non-safety)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction Features:\u003c\/strong\u003e Protective-door monitoring; monitored or automatic start; emergency-OFF \/ E-Stop monitoring; sensor inputs (floating sensor allowed)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Configuration:\u003c\/strong\u003e 1-channel or 2-channel (for redundancy \/ cross-circuit detection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20 (finger-safe, enclosure required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage:\u003c\/strong\u003e 300 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature:\u003c\/strong\u003e –25 … +60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e –40 … +80 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical \/ Environmental Ratings:\u003c\/strong\u003e Vibration 5–500 Hz, 0.75 mm; Shock 10 g \/ 11 ms; Pollution degree 3; Surge withstand 4,000 V; EMC Class A device rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 35 mm DIN rail, 22.5 mm enclosure width — compact installation size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Level \/ Safety Integrity Level (when used with compliant wiring):\u003c\/strong\u003e PL e (ISO 13849-1), SIL 3 (IEC 61508 \/ 62061)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Standards\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeets safety-relay requirements per IEC \/ EN standards for emergency-off \/ protective-guard monitoring (EN 60204-1 \/ ISO 13850 etc.)\u003c\/li\u003e\n\u003cli\u003ePerformance level up to PL e according to ISO 13849-1 (when correctly applied with safety wiring)\u003c\/li\u003e\n\u003cli\u003eSuitable for use in safety-related circuits, conforming to relevant industrial safety norms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 3SK1111-1AW20 is ideal for safety-circuit applications such as emergency stop (E-Stop), protective-door monitoring, safety interlocks, guarded areas, and machine safety interfaces. Use cases include guarding enclosures, guarding machinery access doors, integrating safety sensors (light barriers, safety switches), and ensuring safe shut-off of hazardous machine parts. It is appropriate for factory automation, processing plants, safety control panels, machinery safety circuits and any environment where functional safety and operator protection are required.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775038206016,"sku":"3SK1111-1AW20","price":3676.19,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3SK1111-1AW20.jpg?v=1764852346","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-sirius-safety-relay-basic-unit-3no-1nc-110-240vac-dc","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}