{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7221-1BF22-0XA8","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7221-1BF22-0XA8","canonicalUrl":"https://aoctrl.com/siemens/6ES7221-1BF22-0XA8","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7221-1BF22-0XA8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-200 CN EM 221 digital input module, 6ES7221-1BF22-0XA8, 8 DI, 24 V DC, 2 W, 62×46×80 mm.","salesMarkdown":"The Siemens 6ES7221-1BF22-0XA8 is a spare-part digital input module from the SIMATIC S7-200 CN family, specifically the EM 221. It provides 8 digital inputs rated for 24 V DC, with a sinking-sourcing configuration. This module is designed exclusively for S7-22X CPUs and carries only CE approval. The 8 digital inputs accept 24 V DC signals, with a typical '1' signal current of 4 mA. That 4 mA figure tells you the module's input impedance is around 6 kΩ — standard for S7-200 family inputs, so it will work with most 24 V DC sensors and pushbutton contacts without loading issues. The 2 W typical power loss is drawn from the backplane bus, not an external supply; keep that within the CPU's 5 V DC budget. Physical footprint: 62 mm deep, 46 mm wide, 80 mm high. That 46 mm width is the same as the S7-200 CPU itself, so it snaps onto the DIN rail alongside other S7-200 modules without overhang. The depth matches the CPU profile, meaning it won't stick out past the front of the enclosure. Marked as a spare part and listed with a current lifecycle stage, the 6ES7221-1BF22-0XA8 is not in active new-production runs — it's a service-parts holdover for installed S7-200 CN bases. The 'spare part' tag means Siemens supports it for replacements but won't push it for new designs. Sourcing is via RFQ; we quote to order against confirmed demand. This module snaps onto the same DIN rail as the S7-200 CPU and uses the standard S7-200 ribbon-cable bus connector. No special wiring or extra power supply needed — the 2 W backplane draw is within the CPU's capacity. The 8 inputs are grouped in a single terminal block; wire them as sinking or sourcing per the common rail connection.","metaTitle":"Siemens 6ES7221-1BF22-0XA8 S7-200 CN EM 221 8 DI, 24 V DC","metaDescription":"Siemens 6ES7221-1BF22-0XA8 spare part SIMATIC S7-200 CN digital input EM 221, 8 DI 24 V DC, 2 W power loss, 62 mm depth. CE approval only. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Depth":"62 mm","Width":"46 mm","title":"6ES7221-1BF22-0XA8","Height":"80 mm","description":"*** spare part *** SIMATIC S7-200 CN, Digital input EM 221, only for S7-22X CPU, 8 DI, 24 V DC, sinking-sourcing this S7-200 CN product only has CE approval","lifecycle_stage":"current","Power loss, typ.":"2 W","For Signal \"1\", Typ.":"4 mA","Type of input voltage":"DC","Number of digital inputs":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$81.00 – $173.55","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4244e6711ca4776ca4f58c20846e85d2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=317275&mlfb=6ES7221-1BF22-0XA8"},"ai":{"faq":[{"question":"What are the key dimensions of the 6ES7221-1BF22-0XA8?","answer":"Depth 62 mm, width 46 mm, height 80 mm. The 46 mm width matches the S7-200 CPU, so it aligns on the DIN rail without protruding."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7221-1BF22-0XA8","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6ES7221-1BF22-0XA8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}