{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1221-1BF30-4XB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1221-1BF30-4XB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1221-1BF30-4XB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1221-1BF30-4XB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIPLUS 6AG1221-1BF30-4XB0 8-channel digital input module, 24V DC, for -40 to 70°C ambient, with diagnostics and transmitter supply.","salesMarkdown":"## What it is and the rating that decides fit The Siemens 6AG1221-1BF30-4XB0 is a SIPLUS 8-channel digital input module for the S7-1200 system. The defining spec is the ambient temperature range: -40 to 70°C, which means it runs in freezer lines, unheated warehouses, or outdoor cabinets without derating. That range is the operating limit, not just storage — the module stays powered and functional across the full span. Inputs are 24 VDC, grouped in pairs for electrical isolation (groups of 2). Signal '1' threshold is 15 V DC at 2.5 mA min, 4 mA typical — standard for 3-wire proximity sensors without adjustment. ## What else matters for commissioning Built-in diagnostics and a diagnostic alarm output, parameterizable via the hardware config. The module also supplies voltage for 2-wire transmitters — one less external loop supply to wire. Power consumption is 1.5 W typical, drawing 105 mA from the backplane 5 V and 4 mA per input channel from load voltage L+. That leaves headroom for additional modules in the rack. Cable length: 500 m shielded, 300 m unshielded. IP20 housing, 45 mm wide — one slot on the rail. Compliance: CE marked and FM approved for use in hazardous locations. That covers EU and North American installations for Class I, Division 2 environments.","metaTitle":"6AG1221-1BF30-4XB0 SIPLUS Digital Input, -40 to 70°C","metaDescription":"Siemens 6AG1221-1BF30-4XB0 SIPLUS 8-channel digital input module, 24V DC, rated -40 to 70°C ambient. CE & FM approved. Active production. Source to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Max.":"70 °C","Min.":"-40 °C","Depth":"75 mm","Width":"45 mm","Height":"100 mm","CE mark":"Yes","Plastic":"Yes","FM approval":"Yes","In Groups Of":"2","For Signal \"0\"":"5 V DC at 1 mA","For Signal \"1\"":"15 V DC at 2.5 mA","Shielded, Max.":"500 m","For Maintenance":"Yes","Parameterizable":"Yes","Weight, approx.":"170 g","lifecycle_stage":"current","Diagnostic alarm":"Yes","Power loss, typ.":"1.5 W","Rated value (DC)":"24 V","Unshielded, Max.":"300 m","Fall height, max.":"0.3 m; five times, in product package","up to 40 °C, max.":"8","up to 50 °C, max.":"8","Diagnostics function":"Yes","For Signal \"1\", Min.":"2.5 mA","For Signal \"1\", Typ.":"4 mA","SIL acc. to IEC 61508":"No","IP degree of protection":"IP20","For Status Of The Inputs":"Yes","Number of digital inputs":"8","Required Front Connector":"Yes","Permissible Temperature Change":"5°C to 55°C, 3°C / minute","from backplane bus 5 V DC, max.":"105 mA","Between The Channels, In Groups Of":"2","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","from load voltage L+ (without load), max.":"4 mA; per channel","Performance level according to ISO 13849-1":"No","Product Function / Supply Voltage For Transmitters":"Yes","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 080 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax - 20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m)","For Signal \"0\", Max. (Permissible Quiescent Current)":"1 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$105.41","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=356653&mlfb=6AG1221-1BF30-4XB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6AG1221-1BF30-4XB0/alternatives.json"},"ai":{"faq":[{"question":"What is the operating temperature range of this module?","answer":"Rated for -40 to 70°C ambient air temperature. This covers the full operating range, not just storage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1221-1BF30-4XB0","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/6AG1221-1BF30-4XB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}