{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7321-1EH00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7321-1EH00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7321-1EH00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7321-1EH00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SM 321, 16*AC 120V, optically isolated, 0.91 kgs, Digital Input Modules.","salesMarkdown":"## 16 AC 120V Inputs for S7-300 Racks The Siemens 6ES7321-1EH00-0AA0 is a SM 321 digital input module providing 16 optically isolated channels rated for AC 120V. It reads 16 discrete AC signals — limit switches, pushbuttons, relay contacts — from the field into the PLC backplane. ## EOL Hot – Sourcing Reality","metaTitle":"Siemens 6ES7321-1EH00-0AA0 SM 321","metaDescription":"Siemens SM 321 digital input module, 16 AC 120V channels, optically isolated. EOL hot phase – sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Part #":"6ES7321-1EH00-0AA0","Weight":"0.91 kgs","Category":"PLCs and Accessories","Sub Category":"PLC Expansion Modules","Top Category":"PLCs & HMIs","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$144.78","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=356698&mlfb=6ES7321-1EH00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7321-1EH00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the specifications of 6ES7321-1EH00-0AA0?","answer":"It is a Siemens SM 321 digital input module with 16 optically isolated channels rated for AC 120V. It weighs 0.91 kg and mounts in an S7-300 rack."},{"question":"Is 6ES7321-1EH00-0AA0 compatible with Siemens S7-300?","answer":"Yes, the SM 321 series is the standard digital input module for the S7-300 platform. This module plugs directly into the S7-300 backplane bus and is addressed as a standard 16-channel input card."},{"question":"How can I order 6ES7321-1EH00-0AA0?","answer":"This module is in EOL hot phase; we source it to order against your RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7321-1EH00-0AA0","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/6ES7321-1EH00-0AA0 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}}