{"product_id":"siemens-simatic-s7-1200-g2-sm-1221-digital-input-16di-24vdc-sink-source","title":"Siemens Simatic S7-1200 G2: SM 1221 Digital input, 16DI,  24VDC sink\/source","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens SIMATIC S7-1200 G2 SM 1221 digital input module (6ES7221-1BH50-0XB0) is a compact and reliable input expansion module designed for automation systems. It provides 16 digital inputs at 24 V DC, configurable for both sinking and sourcing operations, enabling precise signal acquisition for industrial applications. This module integrates seamlessly into the SIMATIC S7-1200 series, offering robust performance, high signal reliability, and easy configuration through TIA Portal.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Channels:\u003c\/strong\u003e 16 digital inputs for flexible signal acquisition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 24 V DC (sinking or sourcing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Delay:\u003c\/strong\u003e Configurable from 0.2 ms to 12.8 ms for optimized response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e Up to 300 m (unshielded) or 500 m (shielded)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostics:\u003c\/strong\u003e Integrated input status indication for easy troubleshooting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Standard DIN-rail installation for space-saving integration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fully compatible with SIMATIC S7-1200 CPUs and TIA Portal engineering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e IP20 for safe operation in control cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Series:\u003c\/strong\u003e SIMATIC S7-1200 G2 – SM 1221 Digital Input Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Channels:\u003c\/strong\u003e 16 (24 V DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Type:\u003c\/strong\u003e Sink\/Source\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Current (per channel):\u003c\/strong\u003e 4.1 mA (typical)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Loss:\u003c\/strong\u003e Approx. 3.2 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Current:\u003c\/strong\u003e Max. 90 mA at 5 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Delay (parameterizable):\u003c\/strong\u003e 0.2 – 12.8 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length (unshielded):\u003c\/strong\u003e Up to 300 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length (shielded):\u003c\/strong\u003e Up to 500 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e DIN-rail (EN 60715)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e –20 °C to +60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e –40 °C to +70 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 45 mm × 100 mm × 75 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 0.21 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCE Marking:\u003c\/strong\u003e Complies with EU Machinery and Low Voltage Directives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL \/ CSA:\u003c\/strong\u003e Certified for industrial control equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS Compliant:\u003c\/strong\u003e Free of restricted hazardous substances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWEEE Directive:\u003c\/strong\u003e Take-back obligations apply where required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExport Control:\u003c\/strong\u003e ECCN EAR99H \/ AL N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Classification:\u003c\/strong\u003e Industrial automation input module (Class A)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIdeal for automation systems, control panels, and distributed I\/O applications that require reliable digital signal acquisition. Commonly used in process control, machine building, and factory automation to interface sensors, switches, and signal devices with the SIMATIC S7-1200 PLC platform.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775103709248,"sku":"6ES7221-1BH50-0XB0","price":4063.02,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/6ES7221-1BH50-0XB0.jpg?v=1761123523","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-simatic-s7-1200-g2-sm-1221-digital-input-16di-24vdc-sink-source","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}