{"product_id":"siemens-6es7921-3ak20-0aa0-front-connector-cpu312c","title":"Siemens 6ES7921-3AK20-0AA0 SIMATIC TOP Connect Front Connector 40-Pole Screw CPU 312C PLC Connection Module","description":"\u003cp\u003eThe Siemens 6ES7921-3AK20-0AA0 is a SIMATIC TOP connect front connector module built for the onboard I\/O connection X1 of the compact CPU 312C on S7-300. It routes signals through three 16-pole IDC cable connections and feeds power through screw-type terminals rated 24 V DC, 1 A per contact, torqued to 0.4-0.7 N·m. It plugs into the CPU's X1 connector in place of the factory front connector.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU (Order No.)\u003c\/td\u003e\n\u003ctd\u003e6ES7921-3AK20-0AA0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSIMATIC TOP connect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e4025515069843\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget System\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7-300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitability For Use\u003c\/td\u003e\n\u003ctd\u003eCompact CPU 312 (connection X1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Designation\u003c\/td\u003e\n\u003ctd\u003eFront connector module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Operating Voltage (DC)\u003c\/td\u003e\n\u003ctd\u003e24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Operating Voltage (DC)\u003c\/td\u003e\n\u003ctd\u003e60 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Current\u003c\/td\u003e\n\u003ctd\u003e1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Continuous Current per Contact (DC)\u003c\/td\u003e\n\u003ctd\u003e1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Total Current\u003c\/td\u003e\n\u003ctd\u003e4 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Poles (Front Connector)\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnecting Cable Connection Type\u003c\/td\u003e\n\u003ctd\u003ePlug-in connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoles at 1st Interface\u003c\/td\u003e\n\u003ctd\u003e16 (IDC connector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Plug Contacts\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Wire Length\u003c\/td\u003e\n\u003ctd\u003e30 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Terminals\u003c\/td\u003e\n\u003ctd\u003e8 (2x2 L+, 2x2 M)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Connection Type\u003c\/td\u003e\n\u003ctd\u003eScrew-type terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Position\u003c\/td\u003e\n\u003ctd\u003eAt the top\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor Cross-Section, Flexible with Ferrule\u003c\/td\u003e\n\u003ctd\u003e0.25-0.75 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor Cross-Section, Stranded\u003c\/td\u003e\n\u003ctd\u003e0.25-0.75 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStripped Length\u003c\/td\u003e\n\u003ctd\u003e6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrewdriver Blade Width\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTightening Torque, Screw Terminals\u003c\/td\u003e\n\u003ctd\u003e0.4-0.7 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvervoltage Category\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePollution Degree\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0...60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40...+70 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDirect mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Color\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e0.096 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003ePoland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eCertifications \u0026amp; Standards\u003c\/h2\u003e\u003cul\u003e\u003cli\u003ecULus\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThis connector is scoped to the CPU 312C's X1 onboard I\/O port rather than a standalone I\/O module, so it is the correct choice only for that CPU's connection point and not interchangeable with the 40-pole digital-module variants in the same series. Screw terminals give a documented 0.4-0.7 N·m tightening torque on the three L+\/M supply pairs, which suits a CPU connection that is rarely unplugged once commissioned.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960668610843,"sku":"6ES7921-3AK20-0AA0","price":112.67,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7921-3ak20-0aa0-front-connector-cpu312c-screw.png?v=1789798521","url":"https:\/\/stoklink.com\/products\/siemens-6es7921-3ak20-0aa0-front-connector-cpu312c","provider":"Stoklink","version":"1.0","type":"link"}