{"product_id":"siemens-3rh2911-1fa22-sirius-front-mount-auxiliary-contact-block","title":"Siemens 3RH2911-1FA22 | SIRIUS Auxiliary Contact Block | Front-Mount Switch Block | 2NO + 2NC Instantaneous | Screw Terminals | Brand New Original","description":"\u003cdiv class=\"yz-v6-5-gold\" style=\"width: 100%; max-width: 850px; margin: 20px auto; font-family: 'Inter', system-ui, sans-serif; color: #333; line-height: 1.6; border: 3px solid #000000; border-radius: 12px; overflow: hidden; background: #ffffff; box-shadow: 0 4px 15px rgba(0,0,0,0.1);\"\u003e\n\n    \u003cdiv style=\"background: #009999; padding: 25px 30px; color: #ffffff;\"\u003e\n        \u003cdiv style=\"font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 5px; opacity: 0.95; color: #ffffff;\"\u003eContactor Accessories | Gold SEO Optimized\u003c\/div\u003e\n        \u003ch1 style=\"margin: 0; font-size: clamp(20px, 5vw, 26px); font-weight: 800; color: #ffffff;\"\u003eSiemens 3RH2911-1FA22 Auxiliary Switch\u003c\/h1\u003e\n    \u003c\/div\u003e\n\n    \u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; border: 1px solid #009999;\"\u003e\n        \u003ctr style=\"background: #e6f5f5;\"\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 700; width: 40%;\"\u003eOrder Code (Model Number)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 800;\"\u003e3RH2911-1FA22\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eProduct Series\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 700;\"\u003eSIRIUS Industrial Control Hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background: #e6f5f5;\"\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eMounting Location\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 800;\"\u003eFront-Side Integrated Snap-On Mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eContact Configuration\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 700;\"\u003e4 Poles: 2 NO (Normally Open) + 2 NC (Normally Closed)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background: #e6f5f5;\"\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eSwitching Behavior\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 800;\"\u003eInstantaneous Internal Current Pathways\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eTermination Structure\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 700;\"\u003eHeavy-Duty Screw Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"background: #e6f5f5;\"\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; color: #666;\"\u003eCore Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; border: 1px solid #009999; font-weight: 800;\"\u003eSiemens 3RT2 Power Contactors \/ 3RH2 Contactor Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003cdiv style=\"padding: 30px;\"\u003e\n        \u003ch2 style=\"font-size: 18px; font-weight: 800; color: #333; margin-top: 0;\"\u003ePerformance Overview\u003c\/h2\u003e\n        \u003cp style=\"font-size: 14px; color: #555; line-height: 1.8;\"\u003e\n            The Siemens 3RH2911-1FA22 is an industrial-tier 4-pole auxiliary contact block designed to expand the signaling capacity of the flagship SIRIUS control network. Engineered for direct front-side snap-on installation onto 3RT2 power contactors and 3RH2 contactor relays, this space-saving module requires no tools or DIN rail extensions. It provides an efficient 2NO (Normally Open) and 2NC (Normally Closed) instantaneous contact configuration, ideal for implementing electrical interlocks, remote loop status feedback, and PLC system state signaling. Equipped with robust screw terminals that provide secure wire retention under severe heavy-vibration environments, it functions as a highly dependable hardware solution for complex machinery control panels.\n        \u003c\/p\u003e\n\n        \u003cdiv style=\"background: #fdfdfd; border: 2px solid #eee; border-radius: 12px; padding: 25px; border-left: 10px solid #009999; margin-top: 20px;\"\u003e\n            \u003ch3 style=\"margin-top: 0; font-size: 16px; color: #333;\"\u003e📋 Critical Application Check\u003c\/h3\u003e\n            \u003cul style=\"font-size: 14px; color: #555; padding-left: 20px;\"\u003e\n                \u003cli\u003e\n\u003cstrong\u003eIndustry:\u003c\/strong\u003e Motor Start-Stop Feedback Chains, Electrical Control Cabinet Interlocks, Cascade Conveyor Enable Loops, Star-Delta Motor Control Centers.\u003c\/li\u003e\n                \u003cli\u003e\n\u003cstrong\u003ePanel Density Optimization:\u003c\/strong\u003e The front-mount configuration allows direct integration onto existing contactor bodies, maintaining a compact footprint within narrow electrical enclosures.\u003c\/li\u003e\n                \u003cli\u003e\n\u003cstrong\u003eSystem Resiliency:\u003c\/strong\u003e Boasts a mechanical endurance of 10 million switching cycles under wide operating temperatures (-25°C to +60°C) to ensure consistent signaling performance.\u003c\/li\u003e\n            \u003c\/ul\u003e\n\n            \u003ch4 style=\"font-size: 14px; color: #333; margin-top: 20px; font-weight: 800;\"\u003eSiemens Industrial Controls Integration:\u003c\/h4\u003e\n            \u003cul style=\"font-size: 14px; color: #555; padding-left: 20px;\"\u003e\n                \u003cli\u003eSIRIUS Switch Accessories: \n                    \u003ca href=\"\/collections\/siemens\" style=\"color: #009999; text-decoration: underline; font-weight: 700;\"\u003eSiemens 3RH9 \/ 3RH29 Blocks\u003c\/a\u003e\n                \u003c\/li\u003e\n                \u003cli\u003ePrecision Plant Automation: \n                    \u003ca href=\"\/collections\/siemens\" style=\"color: #009999; text-decoration: underline; font-weight: 700;\"\u003eSiemens Factory Control Infrastructure\u003c\/a\u003e\n                \u003c\/li\u003e\n            \u003c\/ul\u003e\n        \u003c\/div\u003e\n    \u003c\/div\u003e\n\u003c\/div\u003e","brand":"YingZhou Automatization","offers":[{"title":"3RH2911-1FA22","offer_id":58014041047343,"sku":"3RH2911-1FA22","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/9473\/5919\/files\/Siemens-3RH2911-1FA22-SIRIUS-Auxiliary-Contact-Block-Front-Mount-Switch-Block-2NO-2NC-Instantaneous-Screw-Terminals-Brand-New-Original.jpg?v=1780144852","url":"https:\/\/szyingzhou.com\/products\/siemens-3rh2911-1fa22-sirius-front-mount-auxiliary-contact-block","provider":"YingZhou Automatization","version":"1.0","type":"link"}