{"id":7771,"date":"2026-08-03T16:33:24","date_gmt":"2026-08-03T08:33:24","guid":{"rendered":"https:\/\/atfits.com\/?post_type=product&p=7771"},"modified":"2026-08-03T16:33:42","modified_gmt":"2026-08-03T08:33:42","slug":"new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc","status":"publish","type":"product","link":"https:\/\/atfits.com\/es\/producto\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/","title":{"rendered":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC"},"content":{"rendered":"
\n

New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC<\/h1>\n<\/div>\n
\n

Product Overview<\/h2>\n<\/div>\n
\n
3TK2830-1CB30 is an extension safety relay belonging to the Siemens SIRIUS 3TK28 safety relay series. It serves as an auxiliary expansion unit designed to cooperate with basic safety evaluation relays to expand the quantity of safety output contacts. Powered by 24 V AC\/DC, this module receives safety enabling signals from upstream safety relays and provides additional safe contact outputs for controlling contactors, valves and other actuators. Adopting forced-guided contact technology to meet international machinery safety standards, the unit is equipped with screw-type wiring terminals and standard DIN rail mounting structure. It is widely used in automated production lines, machine tools, packaging equipment, robotic workstations and conveyor systems to expand safety output circuits for emergency stop loops, safety door interlock and light curtain protection. The product complies with CE, UL, T\u00dcV and RoHS specifications for global industrial safety applications.<\/div>\n<\/div>\n
\n

Main Technical Specifications<\/h2>\n<\/div>\n
\n
\n
\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter Item<\/th>\nDetailed Specification<\/th>\n<\/tr>\n<\/thead>\n
Model Code<\/td>\n3TK2830-1CB30<\/td>\n<\/tr>\n
Series<\/td>\nSIRIUS 3TK28 Safety Relay Extension Unit<\/td>\n<\/tr>\n
Rated Control Supply Voltage<\/td>\n24 V AC \/ DC<\/td>\n<\/tr>\n
Voltage Tolerance<\/td>\n85% ~ 110% of rated voltage<\/td>\n<\/tr>\n
Safety Contact Configuration<\/td>\n3 Normally Open (NO) safety contacts; 1 Normally Closed (NC) signal contact<\/td>\n<\/tr>\n
Terminal Type<\/td>\nScrew terminals<\/td>\n<\/tr>\n
Rated operational current (AC-15)<\/td>\n3 A at 230 V AC<\/td>\n<\/tr>\n
Rated thermal continuous current<\/td>\n6 A<\/td>\n<\/tr>\n
Contact Structure<\/td>\nForced-guided contacts (mechanically linked contacts)<\/td>\n<\/tr>\n
Response Time<\/td>\n\u2264 25 ms<\/td>\n<\/tr>\n
Mechanical Service Life<\/td>\nUp to 10,000,000 switching cycles<\/td>\n<\/tr>\n
Safety Classification<\/td>\nPL e, Category 4 when matched with corresponding base safety relays<\/td>\n<\/tr>\n
Mounting Standard<\/td>\n35 mm DIN rail<\/td>\n<\/tr>\n
Protection Class<\/td>\nIP20 (for installation inside control cabinet)<\/td>\n<\/tr>\n
Operating Ambient Temperature<\/td>\n-25 \u2103 ~ +60 \u2103<\/td>\n<\/tr>\n
Storage Temperature<\/td>\n-40 \u2103 ~ +80 \u2103<\/td>\n<\/tr>\n
Ambient Humidity<\/td>\n10% ~ 95% RH, non-condensing<\/td>\n<\/tr>\n
Status Indicator<\/td>\nLED power supply indication<\/td>\n<\/tr>\n
Certifications<\/td>\nCE, UL, T\u00dcV, RoHS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n

Overall Dimensions & Net Weight<\/h2>\n<\/div>\n
\n
\n
\n
\n
\n\n\n\n\n\n\n\n\n\n
Dimension & Weight Parameter<\/th>\nExact Data<\/th>\n<\/tr>\n<\/thead>\n
External Dimensions<\/td>\nWidth 22.5 mm \u00d7 Height 100 mm \u00d7 Depth 121.5 mm<\/td>\n<\/tr>\n
Single Unit Net Weight<\/td>\n235 g<\/td>\n<\/tr>\n
Packaged Gross Weight<\/td>\nApproximately 275 g<\/td>\n<\/tr>\n
Housing Material<\/td>\nFlame retardant thermoplastic engineering plastic<\/td>\n<\/tr>\n
Recommended Clearance<\/td>\nMinimum 5 mm gap between adjacent modules on DIN rail<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n

Primary Main Functions<\/h2>\n<\/div>\n
\n
    \n
  1. Safety Contact Expansion: Increase the number of safe load output contacts of the main safety relay to drive multiple independent actuators simultaneously.<\/li>\n
  2. Signal Transfer for Safety Circuits: Receive enabling signals from front-end safety evaluation units and realize synchronous safe cut-off of multi-channel loads.<\/li>\n
  3. Safety Status Signal Feedback: The built-in NC auxiliary contact transmits the working state of the safety circuit to PLC or upper monitoring system.<\/li>\n
  4. Fail-safe Disconnection Function: When the safety circuit is triggered, all safety contacts reliably open to cut off power of dangerous equipment.<\/li>\n
  5. Compatibility with mainstream safety relays: Can be matched with Siemens 3TK28 and 3SK1 series safety base units for system expansion.<\/li>\n
  6. Reliable Contact Monitoring: Forced-guided contact structure prevents dangerous closed contact faults caused by contact welding.<\/li>\n
  7. Centralized load control: Realize unified safety shutdown of multiple contactors, hydraulic valves and pneumatic actuators in automation equipment.<\/li>\n
  8. Convenient cabinet layout: Slim housing structure supports intensive installation inside compact electrical control cabinets.<\/li>\n<\/ol>\n<\/div>\n
    \n

    Key Technical Features<\/h2>\n<\/div>\n
    \n
      \n
    1. Forced-guided contact design strictly meets machinery safety requirements, effectively avoiding hidden dangers caused by contact adhesion failure.<\/li>\n
    2. Compact 22.5 mm slim width saves valuable installation space inside electrical cabinets.<\/li>\n
    3. Universal 24 V AC\/DC wide-range power supply adapts to various industrial control power supply environments.<\/li>\n
    4. Standard 35 mm DIN rail structure allows fast installation, disassembly and replacement.<\/li>\n
    5. Visible LED indicator directly reflects power status for quick on-site inspection and troubleshooting.<\/li>\n
    6. High mechanical durability ensures long-term stable cyclic operation under continuous production conditions.<\/li>\n
    7. Screw terminals provide stable wiring connection, suitable for equipment with strong vibration.<\/li>\n
    8. Modular expansion scheme can cascade multiple extension units according to the quantity of required load contacts.<\/li>\n<\/ol>\n<\/div>\n
      \n

      List of 10 Similar Functional Siemens Safety Relay & Extension Units<\/h2>\n<\/div>\n
      \n
        \n
      1. 3TK2830-2CB30: Push-in terminal version of 3TK2830-1CB30 safety extension unit<\/li>\n
      2. 3TK2825-1BB40: Integrated safety relay with built-in input evaluation and output contacts<\/li>\n
      3. 3TK2840-1CB30: Time-delay safety extension unit with delayed safety contact opening<\/li>\n
      4. 3SK1220-2AA30: Expansion module for SIRIUS 3SK1 safety relay series<\/li>\n
      5. 3TK2831-1CB30: Safety extension unit with different contact configuration<\/li>\n
      6. 3TK2828-1BB40: Safety relay for safety light curtain and safety door monitoring<\/li>\n
      7. 3SK1111-1AB30: Basic safety evaluation relay with screw terminals<\/li>\n
      8. 3RK3221-1AA10: Modular safety system expansion relay for complex safety circuits<\/li>\n
      9. 3TK2850-1CB30: High-current safety contact extension unit for heavy load actuators<\/li>\n
      10. 3SK2112-1AA10: Programmable high-performance safety relay supporting multi-module expansion<\/li>\n<\/ol>\n<\/div>","protected":false},"excerpt":{"rendered":"

        New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC Product Overview 3TK2830-1CB30 is an extension safety relay<\/p>","protected":false},"featured_media":7772,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[111],"product_tag":[],"class_list":["post-7771","product","type-product","status-publish","has-post-thumbnail","product_cat-siemens","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\nNew Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atfits.com\/es\/producto\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits\" \/>\n<meta property=\"og:description\" content=\"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC Product Overview 3TK2830-1CB30 is an extension safety relay\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atfits.com\/es\/producto\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/\" \/>\n<meta property=\"og:site_name\" content=\"Autofits\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-03T08:33:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/atfits.com\/wp-content\/uploads\/2026\/08\/IMG_20260625_095352.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/\",\"url\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/\",\"name\":\"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/atfits.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/IMG_20260625_095352.jpg\",\"datePublished\":\"2026-08-03T08:33:24+00:00\",\"dateModified\":\"2026-08-03T08:33:42+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/#primaryimage\",\"url\":\"https:\\\/\\\/atfits.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/IMG_20260625_095352.jpg\",\"contentUrl\":\"https:\\\/\\\/atfits.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/IMG_20260625_095352.jpg\",\"width\":1000,\"height\":1000,\"caption\":\"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/atfits.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Products\",\"item\":\"https:\\\/\\\/atfits.com\\\/products\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/atfits.com\\\/#website\",\"url\":\"https:\\\/\\\/atfits.com\\\/\",\"name\":\"Autoifts\",\"description\":\"Connecting You to Global Automation Excellence\",\"publisher\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/#organization\"},\"alternateName\":\"Atifts Technology Co., Ltd.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/atfits.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/atfits.com\\\/#organization\",\"name\":\"Atifts Technology Co., Ltd.\",\"alternateName\":\"Autoifts\",\"url\":\"https:\\\/\\\/atfits.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/atfits.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/atfits.com\\\/wp-content\\\/uploads\\\/2024\\\/05\\\/Autofits-logo-700.png\",\"contentUrl\":\"https:\\\/\\\/atfits.com\\\/wp-content\\\/uploads\\\/2024\\\/05\\\/Autofits-logo-700.png\",\"width\":701,\"height\":701,\"caption\":\"Atifts Technology Co., Ltd.\"},\"image\":{\"@id\":\"https:\\\/\\\/atfits.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/atfits.com\/es\/producto\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/","og_locale":"es_ES","og_type":"article","og_title":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits","og_description":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC Product Overview 3TK2830-1CB30 is an extension safety relay","og_url":"https:\/\/atfits.com\/es\/producto\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/","og_site_name":"Autofits","article_modified_time":"2026-08-03T08:33:42+00:00","og_image":[{"width":1000,"height":1000,"url":"https:\/\/atfits.com\/wp-content\/uploads\/2026\/08\/IMG_20260625_095352.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Tiempo de lectura":"4 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/","url":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/","name":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC - Autofits","isPartOf":{"@id":"https:\/\/atfits.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/#primaryimage"},"image":{"@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/#primaryimage"},"thumbnailUrl":"https:\/\/atfits.com\/wp-content\/uploads\/2026\/08\/IMG_20260625_095352.jpg","datePublished":"2026-08-03T08:33:24+00:00","dateModified":"2026-08-03T08:33:42+00:00","breadcrumb":{"@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/#primaryimage","url":"https:\/\/atfits.com\/wp-content\/uploads\/2026\/08\/IMG_20260625_095352.jpg","contentUrl":"https:\/\/atfits.com\/wp-content\/uploads\/2026\/08\/IMG_20260625_095352.jpg","width":1000,"height":1000,"caption":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC"},{"@type":"BreadcrumbList","@id":"https:\/\/atfits.com\/product\/new-original-siemens-3tk2830-1cb30-industrial-safety-relay-extension-unit-24v-ac-dc\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/atfits.com\/"},{"@type":"ListItem","position":2,"name":"Products","item":"https:\/\/atfits.com\/products\/"},{"@type":"ListItem","position":3,"name":"New Original Siemens 3TK2830-1CB30 Industrial Safety Relay Extension Unit 24V AC DC"}]},{"@type":"WebSite","@id":"https:\/\/atfits.com\/#website","url":"https:\/\/atfits.com\/","name":"Autoifts","description":"Connecting You to Global Automation Excellence","publisher":{"@id":"https:\/\/atfits.com\/#organization"},"alternateName":"Atifts Technology Co., Ltd.","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/atfits.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/atfits.com\/#organization","name":"Atifts Technology Co., Ltd.","alternateName":"Autoifts","url":"https:\/\/atfits.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/atfits.com\/#\/schema\/logo\/image\/","url":"https:\/\/atfits.com\/wp-content\/uploads\/2024\/05\/Autofits-logo-700.png","contentUrl":"https:\/\/atfits.com\/wp-content\/uploads\/2024\/05\/Autofits-logo-700.png","width":701,"height":701,"caption":"Atifts Technology Co., Ltd."},"image":{"@id":"https:\/\/atfits.com\/#\/schema\/logo\/image\/"}}]}},"tiered_pricing_type":"fixed","tiered_pricing_fixed_rules":[],"tiered_pricing_product_settings":{"layout":"default","base_unit_name":{"singular":null,"plural":null},"default_variation":null},"tiered_pricing_minimum_quantity":null,"tiered_pricing_roles_data":[],"tiered_pricing_percentage_rules":[],"tiered_pricing_maximum_quantity":null,"tiered_pricing_quantity_step":null,"_links":{"self":[{"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product\/7771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/comments?post=7771"}],"version-history":[{"count":1,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product\/7771\/revisions"}],"predecessor-version":[{"id":7778,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product\/7771\/revisions\/7778"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/media\/7772"}],"wp:attachment":[{"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/media?parent=7771"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product_brand?post=7771"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product_cat?post=7771"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/atfits.com\/es\/wp-json\/wp\/v2\/product_tag?post=7771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}