{"product_id":"siemens-6es7221-3bd30-0xb0-sb-1221-4di-200khz","title":"Siemens 6ES7221-3BD30-0XB0 SIMATIC S7-1200 SB 1221 4DI 24VDC 200kHz Digital Input Signal Board","description":"\u003cp\u003eThe Siemens 6ES7221-3BD30-0XB0 SIMATIC S7-1200 SB 1221 signal board adds 4 current-sourcing digital inputs at 24 V DC to a compact CPU, with a 200 kHz high-speed counting input option. It draws 40 mA from the backplane bus, dissipates 1 W, and mounts directly onto the CPU front without extra rack space.\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\u003e6ES7221-3BD30-0XB0\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\u003eSB 1221, DI 4x24 V DC 200 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4, current-sourcing, in 1 group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 V DC rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal 0 Threshold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eL+ minus 5.0 V DC (1.4-0 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal 1 Threshold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 V to L+ minus 10 V DC (10-2.9 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current, typ.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 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\u003e1 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Filter, parameterizable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1-20 us or 0.05-20 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length, shielded, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 m (shielded, twisted pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature, vertical install\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 50 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e38 x 62 x 21 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e35 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\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThis SB 1221 variant provides 4 current-sourcing inputs at up to 200 kHz; a higher-channel-count sibling in the same signal board family instead offers 8 inputs at 100 kHz. Choose this 4-channel 200 kHz version when the application needs faster edge detection on fewer points, such as a quadrature encoder input, and the 8-channel version when more digital sensing points matter more than raw counting speed. The 50 m shielded cable length limit is notably shorter than the 500 m rating on standard S7-1200 digital input modules, reflecting the higher 200 kHz bandwidth this board is built for.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits high-speed counting tasks directly on an S7-1200 CPU without a rack slot: quadrature encoder feedback, fast proximity sensor pulses, and flow-meter counting up to 200 kHz per channel.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960777728283,"sku":"6ES7221-3BD30-0XB0","price":87.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7221-3bd30-0xb0-sb1221-4di-200khz-signal-board.png?v=1789664085","url":"https:\/\/stoklink.com\/products\/siemens-6es7221-3bd30-0xb0-sb-1221-4di-200khz","provider":"Stoklink","version":"1.0","type":"link"}