{"product_id":"siemens-6es7221-1bh32-0xb0-sm1221-16di-24vdc","title":"Siemens 6ES7221-1BH32-0XB0 SIMATIC S7-1200 SM 1221 16x24VDC Digital Input PLC I\/O Module","description":"\u003cp\u003eThe Siemens 6ES7221-1BH32-0XB0 is a SIMATIC S7-1200 digital input module (SM 1221) with 16 sink\/source inputs rated 24 V DC, expanding a CPU rack with additional discrete inputs. Input delay is parameterizable in groups of four from 0.2 ms to 12.8 ms, and interrupt-capable channels support event-driven program response.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6ES7221-1BH32-0XB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7-1200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct type designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSM 1221, DI 16x24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply voltage, permissible range (DC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20.4 - 28.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of digital inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16, in groups of 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput characteristic curve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIEC 61131, type 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput voltage for signal \"0\" \/ \"1\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 V DC at 1 mA \/ 15 V DC at 2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput current from backplane bus, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e130 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower loss, typ.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable length, shielded \/ unshielded, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 m \/ 300 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP degree of protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient temperature, operation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth \/ Height \/ Depth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 mm \/ 100 mm \/ 75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight, approx.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e210 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eCertifications \u0026amp; Standards\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCE\u003c\/li\u003e\n\u003cli\u003eCSA\u003c\/li\u003e\n\u003cli\u003eUL\u003c\/li\u003e\n\u003cli\u003ecULus\u003c\/li\u003e\n\u003cli\u003eFM\u003c\/li\u003e\n\u003cli\u003eRCM\u003c\/li\u003e\n\u003cli\u003eKC\u003c\/li\u003e\n\u003cli\u003eMarine Approval\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eGrouped in fours, the 16 inputs let four independent sensor groups sit on separate ground references without cross-loading, and the parameterizable input delay (0.2 ms to 12.8 ms per group) trades noise immunity against response speed — set it short for fast interrupt inputs and longer for switch or relay contacts prone to bounce. Choose the 16 DI 24V DC module over an 8-input SM 1221 variant when the station needs headroom for future sensor additions without adding another rack slot.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eExpanding S7-1200 CPU input count for discrete sensors, limit switches, and pushbuttons in machine control panels, with interrupt-capable channels for fast event capture.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960777335067,"sku":"6ES7221-1BH32-0XB0","price":241.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7221-1bh32-0xb0-sm1221-16di-24vdc.png?v=1789662608","url":"https:\/\/stoklink.com\/products\/siemens-6es7221-1bh32-0xb0-sm1221-16di-24vdc","provider":"Stoklink","version":"1.0","type":"link"}