{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7121-1FA00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7121-1FA00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7121-1FA00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7121-1FA00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC SC electronic submodule, 6ES7121-1FA00-0AA0, 1 digital input, AC 115/230 V, 51 mm depth, 10 mm width, 64 mm height.","salesMarkdown":"## Single AC input slice for SIMATIC SC The 6ES7121-1FA00-0AA0 is a spare-part electronic submodule for the SIMATIC SC system, carrying one digital input rated for 120/230 V AC nominal (74 to 264 V AC for signal '1', 0 to 40 V AC for signal '0'). It occupies one slot from position 8 onward in the SC backplane and draws a typical power loss of 0.6 W. ## Panel fit and wiring constraints It accepts a TB 16SC terminal block and supports unshielded cable runs up to 600 m or shielded runs up to 1 000 m. ## Input characteristics and diagnostics The input filters both rising and falling edges with a maximum delay of 30 ms — this built-in debounce prevents false triggers from contact bounce or line noise but adds latency that must be accounted for in fast-response safety logic. A green LED per channel provides a local status indication; the module has no diagnostic function or alarm output. It is compatible with 2-wire sensors, with a permissible quiescent current up to 1.5 mA (signal '0' max 2.2 mA), and draws a typical 3.7 mA at signal '1'. ## Isolation and approvals Channel-to-backplane bus isolation is provided, and the isolation is tested at 2 500 V DC. Between the M terminal internally and the inputs, the rated voltage is 240 V AC.","metaTitle":"Siemens 6ES7121-1FA00-0AA0 SIMATIC SC 1 DI AC 115/230 V","metaDescription":"Siemens 6ES7121-1FA00-0AA0 SIMATIC SC electronic submodule, 1 digital input, 115/230 V AC. Active production, 51 mm depth, 10 mm width. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Depth":"51 mm","Width":"10 mm","Alarms":"No","Height":"64 mm","2-Wire Sensor":"Yes","For Signal \"0\"":"0 to 40 V AC/ 0 to 40 V DC","For Signal \"1\"":"74 to 264 V AC/75 to 264 V DC","Required Slots":"1; from 8","Shielded, Max.":"1 000 m","Weight, approx.":"15 g","lifecycle_stage":"current","Power loss, typ.":"0.6 W","Rated value (AC)":"230 V; 120/230 V AC","Unshielded, Max.":"600 m","At \"0\" To \"1\", Max.":"30 ms","At \"1\" To \"0\", Max.":"30 ms","Diagnostics function":"No","For Signal \"1\", Typ.":"3.7 mA","Isolation tested with":"2 500 V DC","Usable terminal block":"TB 16SC","Number of digital inputs":"1","between M internally and the inputs":"240 V AC","Between The Channels And Backplane Bus":"Yes","Status indicator digital input (green)":"Yes","Permissible Quiescent Current (2-Wire Sensor), Max.":"1.5 mA","For Signal \"0\", Max. (Permissible Quiescent Current)":"2.2 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$205.74","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=162749&mlfb=6ES7121-1FA00-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7121-1FA00-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How can I order 6ES7121-1FA00-0AA0 and check availability?","answer":"This part is quoted to order against your BOM quantity through independent distribution."},{"question":"What is the closest pin-compatible alternative to 6ES7121-1FA00-0AA0?","answer":"No official successor or pin-compatible alternative is recorded from the manufacturer. The module is a current-production spare part; for a functional replacement, confirm the slot position and AC input voltage match before specifying."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7121-1FA00-0AA0","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/6ES7121-1FA00-0AA0 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}}