{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7403-1JA00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7403-1JA00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7403-1JA00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7403-1JA00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-400, ER2 expansion rack, 9 slots, for signal modules only, order code 6ES7403-1JA00-0AA0.","salesMarkdown":"The Siemens 6ES7403-1JA00-0AA0 is a SIMATIC S7-400 ER2 expansion rack with 9 slots, designed exclusively for signal modules — no CPU or power supply slot on this backplane. It extends the I/O capacity of an S7-400 system by housing up to nine signal modules (digital/analog input or output) in a separate chassis, connected via the rack bus to the central controller. ## Integration note Mounts in a standard 19-inch cabinet or panel; the rack connects to the S7-400 central controller via the backplane bus cable (not included). No DIN-rail clip — it bolts into the enclosure. Only signal modules populate these slots; the CPU and power supply reside in the central rack (UR1/UR2). Verify bus cable length and slot numbering before commissioning.","metaTitle":"Siemens 6ES7403-1JA00-0AA0 S7-400 ER2 9-Slot Expansion Rack,","metaDescription":"SIMATIC S7-400 ER2 expansion rack, 9 slots for signal modules only. Lifecycle stage: mature. Sourced to order via RFQ. Siemens 6ES7403-1JA00-0AA0.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"lifecycle_stage":"mature"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=270075&mlfb=6ES7403-1JA00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7403-1JA00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to 6ES7403-1JA00-0AA0 in the S7-400 family?","answer":"Within the S7-400 family, the ER2 rack is a 9-slot expansion chassis for signal modules only. A direct functional equivalent would be another ER2 rack with the same slot count and bus interface — no pin-compatible drop-in exists outside the Siemens S7-400 line."},{"question":"What does the description 'ER2 EXP. RACK, W. 9 SLOTS, F. SIGNAL MOD. ONLY' mean?","answer":"It means this is an expansion rack (ER2) with nine slots that accept only signal modules (digital/analog I/O). It does not have a slot for a CPU or power supply module; those go in the central rack."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7403-1JA00-0AA0","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/6ES7403-1JA00-0AA0 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}}