{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7431-1KF00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7431-1KF00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7431-1KF00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7431-1KF00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6ES7431-1KF00-0AB0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","salesMarkdown":"## Overview The 6ES7431-1KF00-0AB0 is a Siemens SM 431 analog input module for the SIMATIC S7-400 system, providing 8 isolated analog inputs with 13-bit resolution across voltage, current, and resistance measuring ranges. It draws 1.8 W from the backplane bus and occupies a single slot width of 25 mm, fitting into the standard S7-400 rack. Temperature error is specified at 0.02 %/K across most ranges, with a tighter ±0.007 % in impedance measuring ranges. The module does not include onboard diagnostics, so fault detection relies on the CPU or external monitoring. The SM 431 series sits in the S7-400 analog input family, offering a balance of channel count and resolution for medium-density applications. The 6ES7431-1KF00-0AB0 is specified when the application requires resistance measurement alongside standard voltage and current inputs, without the higher channel count or thermocouple capability of other SM 431 variants.","metaTitle":"Siemens 6ES7431-1KF00-0AB0 SM 431 Analog Input Module, 8 AI, 13 bit","metaDescription":"Siemens SM 431 analog input module 6ES7431-1KF00-0AB0: 8 isolated analog inputs, 13-bit resolution, voltage/current/resistance ranges, 1.8 W, 24 V backplane.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog Input Modules"],"specifications":{"Depth":"210 mm","Width":"25 mm","Height":"290 mm","Current":"Yes","Voltage":"Yes","1 V to 5 V":"Yes","Resistance":"Yes","-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.":"1.8 W","Rated value (DC)":"not necessary","Between The Channels":"No","Diagnostics function":"No","Integration time (ms)":"16,7 / 20 ms","Isolation tested with":"2 120 V DC between bus and analog part; 500 V DC between bus and local ground; 2 120 V DC between analog part and local ground","Resistance thermometer":"No","For Voltage Measurement":"Yes; possible","Number of analog inputs":"8","Basic conversion time (ms)":"23 / 25 ms","For resistance measurement":"4","Input resistance (1 V to 5 V)":"200 kΩ","For voltage/current measurement":"8","Input resistance (-1 V to +1 V)":"200 kΩ","from backplane bus 5 V DC, max.":"350 mA","Input resistance (0 to 600 ohms)":"usable up to 500 ohms","Input resistance (4 mA to 20 mA)":"80 Ω","Input resistance (-10 V to +10 V)":"200 kΩ","Integration time, parameterizable":"Yes","Potential separation analog inputs":"Yes; internal/external","Input resistance (-20 mA to +20 mA)":"80 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, (+/-)":"0.7 %; 0.7% at ±1 V; 0.4% at ±10 V; 0.5% at 1 to 5 V","Resistance, relative to input range, (+/-)":"0.8 %; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms)","For Current Measurement As 2-Wire Transducer":"Yes; with external transmitter supply","For Current Measurement As 4-Wire Transducer":"Yes","Temperature error (relative to input range), (+/-)":"0.02 %/K; ±0.02 %/K in impedance measuring range; ±0.007 % in all other measuring ranges","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.":"13 bit","For Resistance Measurement With Three-Wire Connection":"Yes; Line resistances are also measured","Basic execution time of the module (all channels released)":"200 ms; 184 / 200 ms","Constant measurement current for resistance-type transmitter, typ.":"1.67 mA","Interference voltage suppression for interference frequency f1 in Hz":"50 / 60 Hz","Permissible Input Current For Current Input (Destruction Limit), Max.":"50 mA; 40 mA continuous","Permissible Input Voltage For Voltage Input (Destruction Limit), Max.":"50 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,442.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f29e21306497bbacb5b4260bbee99248.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=263844&mlfb=6ES7431-1KF00-0AB0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7431-1KF00-0AB0","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/6ES7431-1KF00-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-06-29T07:19:29.075Z","lastPublished":"2026-06-29T07:19:29.075Z","indexable":true}}