{"product_id":"siemens-3sk1121-1cb42","title":"3SK1121-1CB42","description":"\u003ch2\u003eBuy genuine Siemens 3SK1121-1CB42 online\u003c\/h2\u003e\n\u003cp\u003eThe Siemens 3SK1121-1CB42 is a SIRIUS series safety relay designed as a basic unit with advanced features ideal for industrial automation safety applications. It features an adjustable time delay ranging from 0.5 to 30 seconds and operates at 24 V DC via secure screw terminals. This compact device provides 2 instantaneous normally open (NO) and 2 delayed NO safety contacts, making it suitable for critical safety monitoring tasks. With an IP20 protection rating, it is designed for finger-safe operation and reliable performance in harsh environments with temperatures from -25 to +60 °C. Certified to SIL 3 and PL e standards, the 3SK1121-1CB42 ensures high reliability for complex safety control systems requiring advanced time-delay safety circuits. The relay’s compact DIN-rail mount design optimizes panel space, while its rugged construction supports vibration and shock resistance, making it a dependable choice for machine and process safety controls.\u003c\/p\u003e\n\u003ch2\u003eKey Features of Siemens 3SK1121-1CB42\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAdjustable time delay from 0.5 to 30 seconds for flexible safety timing\u003c\/li\u003e\n  \u003cli\u003eTwo instantaneous and two delayed normally open contacts for versatile safety outputs\u003c\/li\u003e\n  \u003cli\u003e24 V DC control voltage with screw terminal connection for secure wiring\u003c\/li\u003e\n  \u003cli\u003eCompact DIN-rail mount design suitable for control panel integration\u003c\/li\u003e\n  \u003cli\u003eIP20 finger-safe enclosure for operator safety during installation and maintenance\u003c\/li\u003e\n  \u003cli\u003eCertified to SIL 3 (IEC 61508) and PL e (ISO 13849) for highest safety integrity\u003c\/li\u003e\n  \u003cli\u003eRobust construction with resistance to vibration (5-500 Hz) and shock (10g\/11 ms)\u003c\/li\u003e\n  \u003cli\u003eReliable insulation voltage rating up to 300 V and surge voltage resistance of 4,000 V\u003c\/li\u003e\n  \u003cli\u003eComplies with EMI standards IEC 60947-5-1 for electromagnetic compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specs of 3SK1121-1CB42\u003c\/h2\u003e\n\u003cp\u003eExplore Siemens 3SK1121-1CB42 specifications covering voltage, I\/O, and communication to ensure system compatibility.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Delay Range\u003c\/td\u003e\n\u003ctd\u003e0.5 to 30 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Contacts\u003c\/td\u003e\n\u003ctd\u003e2 instantaneous NO, 2 delayed NO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN-rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25 to +60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Certifications\u003c\/td\u003e\n\u003ctd\u003eSIL 3, PL e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Voltage\u003c\/td\u003e\n\u003ctd\u003e300 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge Voltage Resistance\u003c\/td\u003e\n\u003ctd\u003e4,000 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\n\u003cp\u003eThis Siemens 3SK1121-1CB42 is commonly used in industrial automation for ensuring safe control of emergency stops, light barriers, protective doors, and safety scanners. Its configurable time delay feature provides adaptable protection timing needed in production line systems, packaging operations, and factory control panels where precise safety interlock sequences are critical. The relay supports SIL 3 and PL e safety standards, making it suitable for applications requiring high reliability and compliance with international safety regulations. It integrates seamlessly into machine automation setups that demand robust and certified safety control components.\u003c\/p\u003e\n\u003ch2\u003ePrice \u0026amp; Availability\u003c\/h2\u003e\n\u003cp\u003eCheck Siemens 3SK1121-1CB42 price and availability online through LeadTime.ca for fast worldwide dispatch.\u003c\/p\u003e\n\u003ch2\u003eWhy Order from LeadTime.ca\u003c\/h2\u003e\n\u003cp\u003eAll product on LeadTime.ca is genuine, authentic OEM, supplied by trusted distributors, and available for worldwide shipping. Order now for worldwide delivery.\u003c\/p\u003e\n\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/\"\u003eLeadTime.ca – Industrial Automation Components \u0026amp; Repair Services\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/collections\/siemens\"\u003eBrowse Siemens PLCs, Drives \u0026amp; Automation Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-plc-programming-basics\"\u003eSiemens PLC programming basics\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-tia-portal-io-errors\"\u003eSiemens TIA Portal IO errors troubleshooting\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-drive-parameter-setup\"\u003eSiemens drive parameter setup guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":47796228423979,"sku":null,"price":305.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/3SK1121-1CB42.png?v=1705841035","url":"https:\/\/leadtime.ca\/products\/siemens-3sk1121-1cb42","provider":"LEADTIME","version":"1.0","type":"link"}