{"product_id":"siemens-sirius-3sk1-advanced-safety-relays","title":"Siemens SIRIUS 3SK1 Advanced Safety Relays (3SK1120, 3SK1121, 3SK1122)","description":"\u003cp class=\"ps-intro\"\u003eSIRIUS 3SK1 Advanced basic safety relays that can be expanded with inputs and outputs via 3ZY12 device connectors without extra wiring.\u003c\/p\u003e\u003ch4 class=\"ps-h\"\u003eKey features\u003c\/h4\u003e\u003cul class=\"ps-feat\"\u003e\n\u003cli\u003eUp to SIL 3 (IEC 62061) and PL e (ISO 13849-1)\u003c\/li\u003e\n\u003cli\u003eUse of 3ZY12 device connectors possible for sensor and output expansion\u003c\/li\u003e\n\u003cli\u003eRelay outputs (3SK1121) or semiconductor outputs (3SK1120, 3SK1122)\u003c\/li\u003e\n\u003cli\u003eVersions with adjustable OFF-delay: 0.05-3 s, 0.5-30 s or 5-300 s\u003c\/li\u003e\n\u003cli\u003eParameterization via DIP switches\u003c\/li\u003e\n\u003cli\u003eScrew or spring-loaded (push-in) terminals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4 class=\"ps-h\"\u003eSpecifications\u003c\/h4\u003e\u003ctable class=\"ps-kv\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct line\u003c\/th\u003e\n\u003ctd\u003eSIRIUS 3SK1 Advanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eControl supply voltage\u003c\/th\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAmbient temperature\u003c\/th\u003e\n\u003ctd\u003e-25 ... +60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDegree of protection\u003c\/th\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSafety level\u003c\/th\u003e\n\u003ctd\u003eSIL 3 \/ PL e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApprovals\u003c\/th\u003e\n\u003ctd\u003eUL, TÜV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003e35 mm DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSource\u003c\/th\u003e\n\u003ctd\u003eSiemens Catalog IC 10 · 2026, p. 1053-1056\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable class=\"ps-src\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-1AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 3 NO + 1 NC signaling (relay) | OFF-delay: None | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-2AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 3 NO + 1 NC signaling (relay) | OFF-delay: None | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-1CB41\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 0.05 ... 3 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-2CB41\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 0.05 ... 3 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-1CB42\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 0.5 ... 30 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-2CB42\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 0.5 ... 30 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-1CB44\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 5 ... 300 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1121-2CB44\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1121 Advanced | Outputs: 2 NO instant. + 2 NO delayed (relay) | OFF-delay: 5 ... 300 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1120-1AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1120 Advanced | Outputs: 1 safety (semicond.) | OFF-delay: None | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1120-2AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1120 Advanced | Outputs: 1 safety (semicond.) | OFF-delay: None | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-1AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 3 safety + 1 signaling (semicond.) | OFF-delay: None | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-2AB40\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 3 safety + 1 signaling (semicond.) | OFF-delay: None | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-1CB41\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 0.05 ... 3 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-2CB41\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 0.05 ... 3 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-1CB42\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 0.5 ... 30 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-2CB42\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 0.5 ... 30 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-1CB44\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 5 ... 300 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3SK1122-2CB44\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3SK1122 Advanced | Outputs: 2 instant. + 2 delayed (semicond.) | OFF-delay: 5 ... 300 s | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":67535296364834,"sku":"3SK1121-1AB40","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/0744\/7586\/files\/siemens-sirius-3sk1-advanced-safety-relays.jpg?v=1792150171","url":"https:\/\/prosourcemro.com\/products\/siemens-sirius-3sk1-advanced-safety-relays","provider":"ProSource MRO","version":"1.0","type":"link"}