{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7431-1KF20-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7431-1KF20-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7431-1KF20-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7431-1KF20-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-400 6ES7431-1KF20-0AB0 analog input module, 8 AI, 52 µs conversion, 4.9 W, 210 mm depth.","salesMarkdown":"The Siemens 6ES7431-1KF20-0AB0 is an 8-channel analog input module. It accepts voltage, current, and resistance inputs with a basic conversion time of 52 µs and typical power loss of 4.9 W. ## Input flexibility and isolation Input ranges include ±10 V, ±1 V, 1–5 V, 4–20 mA, ±20 mA, and 0–600 Ω. Input resistance varies: 10 MΩ on ±1 V and 1–5 V ranges, 50 kΩ on 4–20 mA, 50 Ω on ±20 mA — relevant when calculating loop loading for passive sensors. Isolation is internal/external with tested breakdown at 2 120 V DC between bus and analog section and 500 V DC between analog part and L+/M. The module draws up to 1 000 mA from the 5 V DC backplane bus. The 24 V DC supply is only required if powering 2-wire transmitters. Shielded cable runs up to 200 m are supported. Lifecycle stage is listed as mature. This is an established part, not flagged for discontinuation.","metaTitle":"Siemens 6ES7431-1KF20-0AB0 Analog Input Module, 8 AI, Mature","metaDescription":"Siemens 6ES7431-1KF20-0AB0 analog input module for S7-400, 8 channels, voltage/current/resistance, mature lifecycle, available on RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog Input Modules"],"specifications":{"Depth":"210 mm","Width":"25 mm","title":"6ES7431-1KF20-0AB0","Height":"290 mm","Current":"Yes","Voltage":"Yes","1 V to 5 V":"Yes","Resistance":"Yes","description":"Siemens 6ES7431-1KF20-0AB0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","-1 V to +1 V":"Yes","Thermocouple":"No","0 To 600 Ohms":"Yes","4 mA to 20 mA":"Yes","-10 V to +10 V":"Yes","Shielded, Max.":"200 m","Weight, approx.":"500 g","lifecycle_stage":"mature","-20 mA to +20 mA":"Yes","Power loss, typ.":"4.9 W","Rated value (DC)":"24 V; Only required for supplying 2-wire transmitters","Between The Channels":"No","Diagnostics function":"No","Isolation tested with":"2 120 V DC between bus and analog section; 500 V DC between bus and local ground; 500 V DC between analog part and L+/M; 2 120 V DC between analog part and local ground; 2 120 V DC between L+/M and local ground","Resistance thermometer":"No","For Voltage Measurement":"Yes; possible","Number of analog inputs":"8","Basic conversion time (ms)":"52 µs","For resistance measurement":"4","Reverse polarity protection":"Yes","Input resistance (1 V to 5 V)":"10 MΩ","For voltage/current measurement":"8","Input resistance (-1 V to +1 V)":"10 MΩ","from backplane bus 5 V DC, max.":"1 000 mA","Input resistance (4 mA to 20 mA)":"50 kΩ","Input resistance (-10 V to +10 V)":"100 kΩ","Integration time, parameterizable":"Yes","Time constant of the input filter":"15 µs","Potential separation analog inputs":"Yes; internal/external","Input resistance (-20 mA to +20 mA)":"50 Ω","Between The Channels And Backplane Bus":"Yes","Current, relative to input range, (+/-)":"0.7 %; at ±20 mA, 4 to 20 mA","Voltage, relative to input range, (+/-)":"0.6 %; 0.6 % at ±1 V; 0.75 % at ±10 V, 1 to 5 V","Between the channels and load voltage L+":"Yes","from load voltage L+ (without load), max.":"200 mA; for 8 connected, fully controlled 2-wire transmitters","Resistance, relative to input range, (+/-)":"0.7 %; 0 to 600 ohms","For Current Measurement As 2-Wire Transducer":"Yes","For Current Measurement As 4-Wire Transducer":"Yes","Temperature error (relative to input range), (+/-)":"0.03 %/K","For Resistance Measurement With Two-Wire Connection":"Yes; Line resistances are also measured","For Resistance Measurement With Four-Wire Connection":"Yes","Resolution with overrange (bit including sign), max.":"14 bit; 14 / 14 / 14","For Resistance Measurement With Three-Wire Connection":"Yes; Line resistances are also measured","Basic execution time of the module (all channels released)":"0.42 s","Constant measurement current for resistance-type transmitter, typ.":"1.67 mA","Interference voltage suppression for interference frequency f1 in Hz":"none / 400 / 60 / 50 Hz","Permissible Input Current For Current Input (Destruction Limit), Max.":"40 mA; Permanent","Permissible Input Voltage For Voltage Input (Destruction Limit), Max.":"18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$887.20 – $1,411.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8f4b42fbac324c2e9b0152a15bf617d0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=246770&mlfb=6ES7431-1KF20-0AB0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7431-1KF20-0AB0","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/6ES7431-1KF20-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}