{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7321-1FH00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7321-1FH00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7321-1FH00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7321-1FH00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 321 digital input module, 6ES7321-1FH00-0AA0, 16 digital inputs, 120/230 V AC isolated, 1x 20-pole, 40 mm wide.","salesMarkdown":"This 6ES7321-1FH00-0AA0 is a SIMATIC S7-300 SM 321 digital input module – 16 isolated AC inputs rated for 120/230 V AC (47–63 Hz). It reads line-voltage signals from switches, proximity sensors, or pushbuttons directly, without an interposing relay. Each input group of four is optically isolated from the backplane bus. 20-pin front connector required (not included). Unshielded cable max. 600 m; shielded cable max. 1 000 m. Isolation tested at 4 000 V DC between channels and backplane.","metaTitle":"Siemens 6ES7321-1FH00-0AA0 SM 321 Digital Input, 16 DI AC, 1","metaDescription":"Siemens SIMATIC S7-300 SM 321 6ES7321-1FH00-0AA0: 16 digital inputs, 120/230V AC, isolated, end-of-life (EOL). Available quoted to order. Ideal for legacy panel spares or BOM compl","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Depth":"120 mm","Width":"40 mm","Alarms":"No","Height":"125 mm","2-Wire Sensor":"Yes","For Signal \"0\"":"0 to 40V","For Signal \"1\"":"79 to 264V","Shielded, Max.":"1 000 m","Parameterizable":"No","Weight, approx.":"240 g","lifecycle_stage":"eol_hot","Diagnostic alarm":"No","Power loss, typ.":"4.9 W","Rated value (AC)":"230 V; 120/230 V AC (47 ... 63 Hz)","Unshielded, Max.":"600 m","Hardware interrupt":"No","up to 40 °C, max.":"16","up to 60 °C, max.":"16","At \"0\" To \"1\", Max.":"25 ms","At \"0\" To \"1\", Min.":"25 ms","At \"1\" To \"0\", Max.":"25 ms","Between The Channels":"No","Diagnostics function":"No","For Signal \"1\", Typ.":"6.5 mA; (120 V, 60 Hz), 16 mA (230 V, 50 Hz)","Group error SF (red)":"No","Isolation tested with":"4 000 V DC","Type of input voltage":"AC","Number of digital inputs":"16","Required Front Connector":"20-pin","from backplane bus 5 V DC, max.":"29 mA","Between The Channels, In Groups Of":"4","Between The Channels And Backplane Bus":"Yes; Optocoupler","Status indicator digital input (green)":"Yes","Permissible Quiescent Current (2-Wire Sensor), Max.":"2 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$190.50 – $381.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/22283faf45fb026d04be3c8c458117c7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=153365&mlfb=6ES7321-1FH00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7321-1FH00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I source this part now?","answer":"Since it's EOL, we quote each order against available surplus stock. Submit an RFQ and we'll confirm availability and lead time from our network."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7321-1FH00-0AA0","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/6ES7321-1FH00-0AA0 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}}