{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7321-1BH50-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7321-1BH50-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7321-1BH50-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7321-1BH50-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 321 digital input module, 6ES7321-1BH50-0AA0, 16 isolated inputs, 24 V DC source input, 1x 20-pole front connector.","salesMarkdown":"## S7-300 Rack Fit — 16 DI, Isolated, Source Input The 6ES7321-1BH50-0AA0 is a SIMATIC S7-300 SM 321 digital input module delivering 16 isolated inputs at 24 V DC, source-input type, drawing 7 mA typical per channel at signal \"1\". It occupies one slot on the S7-300 DIN rail backplane — 40 mm wide, 125 mm high, 120 mm deep — and requires a 20-pin front connector for field wiring. The input filters are fixed (not parameterizable): 1.2 ms to 4.8 ms on both rising and falling edges, so the module responds to fast sensor edges within that window. ## Isolation, Diagnostics, and Sensor Compatibility Channel-to-backplane isolation uses optocouplers, tested at 500 V DC — the 16 inputs share a common group, so all channels in the group must reference the same field ground. No diagnostic alarm, no hardware interrupt, no parameterizable alarms — this is a basic-input module for straightforward 24 V DC sensing where you don't need per-channel fault reporting. Accepts 2-wire proximity sensors; the permissible quiescent current is 1.5 mA max, so a sensor's dark current must stay below that to guarantee a clean \"0\" signal. ## End-of-Life Status — Sourcing Reality","metaTitle":"Siemens 6ES7321-1BH50-0AA0 SIMATIC S7-300 SM 321, 16 DI","metaDescription":"Siemens 6ES7321-1BH50-0AA0 SIMATIC S7-300 digital input module, 16 isolated inputs, 24 V DC source input, 20-pin front connector.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Depth":"120 mm","Width":"40 mm","title":"6ES7321-1BH50-0AA0","Alarms":"No","Height":"125 mm","description":"SIMATIC S7-300, Digital input SM 321, Isolated 16 DI, 24 V DC, Source input, 1x 20-pole","2-Wire Sensor":"Yes","For Signal \"0\"":"-5 to +30V","For Signal \"1\"":"-13 to -30V","Shielded, Max.":"1 000 m","Parameterizable":"No","Weight, approx.":"200 g","lifecycle_stage":"eol_hot","Diagnostic alarm":"No","Power loss, typ.":"3.5 W","Rated value (DC)":"24 V","Unshielded, Max.":"600 m","Hardware interrupt":"No","up to 40 °C, max.":"16","up to 60 °C, max.":"16","At \"0\" To \"1\", Max.":"4.8 ms","At \"0\" To \"1\", Min.":"1.2 ms","At \"1\" To \"0\", Max.":"4.8 ms","At \"1\" To \"0\", Min.":"1.2 ms","Between The Channels":"No","Diagnostics function":"No","For Signal \"1\", Typ.":"7 mA","Isolation tested with":"500 V DC","Type of input voltage":"DC","Number of digital inputs":"16","Required Front Connector":"20-pin","from backplane bus 5 V DC, max.":"10 mA","Between The Channels, In Groups Of":"16","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","Between The Channels And Backplane Bus":"Yes; Optocoupler","Status indicator digital input (green)":"Yes","Permissible Quiescent Current (2-Wire Sensor), Max.":"1.5 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$160.02 – $215.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/49ae384ccd762685b52e5386486d434e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=409025&mlfb=6ES7321-1BH50-0AA0"},"ai":{"faq":[{"question":"Where can I buy 6ES7321-1BH50-0AA0?","answer":"Sourced to order against an RFQ through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7321-1BH50-0AA0","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/6ES7321-1BH50-0AA0 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}}