{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7322-1HF20-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7322-1HF20-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7322-1HF20-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7322-1HF20-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 322, 6ES7322-1HF20-0AA0, digital output module, 8 relay outputs, 24 V DC / 120-230 V AC, 5 A, optically isolated, integrated snubber.","salesMarkdown":"## Eight relay outputs with built-in snubber The 6ES7322-1HF20-0AA0 is an SM 322 digital output module for the SIMATIC S7-300 rack, delivering eight relay outputs rated 5 A each at 24 V DC or 120–230 V AC. The integrated snubber across each relay coil suppresses inductive kickback from contactors, solenoids, and motor starters — so out here in the grease, a valve or a conveyor contactor won't weld the relay contacts on the first open. The 40-pin front connector carries the field wiring; the backplane bus provides the 24 V DC module supply and the PII data. ## What the specs mean for your panel Eight relay outputs means eight independent Form C (SPDT) contacts, each rated 5 A — enough for a small contactor coil or a solenoid valve directly, no interposing relay needed. The 24 V DC side powers the module logic; the 120–230 V AC side is the switched load. Optically isolated between the backplane and the field, so a short on the load side won't take out the S7-300 backplane bus. The 40-pin connector is the standard S7-300 front connector; the module snaps into any S7-300 rack slot.","metaTitle":"Siemens 6ES7322-1HF20-0AA0 SM 322, 8 Relay Outputs, EOL","metaDescription":"Siemens 6ES7322-1HF20-0AA0 SM 322 digital output module, 8 relay outputs, 5 A, with integrated snubber. EOL lifecycle — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Output Modules"],"specifications":{"lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$137.16","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=219394&mlfb=6ES7322-1HF20-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7322-1HF20-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does 6ES7322-1HF20-0AA0 have a built-in snubber for inductive loads?","answer":"Yes. The module includes an integrated snubber circuit across each relay output, specifically noted for inductive loads. This suppresses the voltage spike when switching off coils, extending relay contact life."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7322-1HF20-0AA0","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/6ES7322-1HF20-0AA0 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}}