{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7331-7KB81-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7331-7KB81-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7331-7KB81-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7KB81-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SM 331 analog input module, 6ES7331-7KB81-0AB0, 2 channels × 12-bit resolution, galvanically isolated, lifecycle stage end-of-life.","salesMarkdown":"## S7-300 Analog Input Module — SM 331, 2×12 Bit The Siemens 6ES7331-7KB81-0AB0 is an SM 331 analog input module providing 2 analog input channels with 12-bit resolution and galvanic isolation between channels and the backplane bus. Galvanic isolation means each input channel is electrically separated from the module's internal circuitry and the backplane — this prevents ground loops when the module is wired to field transmitters running on different power supplies, a common requirement in mixed-signal panels. The SM 331 snaps onto the S7-300 DIN rail and communicates over the backplane bus — no separate fieldbus wiring needed for the analog data. The 2-channel density saves one slot compared to a 4-channel module if only two analog points are required.","metaTitle":"Siemens 6ES7331-7KB81-0AB0 SM 331 Analog Input, 2×12 Bit","metaDescription":"Siemens SM 331 analog input module, 2 channels 12-bit, galvanically isolated. Lifecycle stage eol_hot — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$190.50","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=295956&mlfb=6ES7331-7KB81-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7KB81-0AB0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7331-7KB81-0AB0","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/6ES7331-7KB81-0AB0 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}}