{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7331-7SF00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7331-7SF00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7331-7SF00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7SF00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SM 331 analog input module, 6ES7331-7SF00-0AB0, 8 analog inputs configurable for thermocouples (types B, E, J, K, N, R, S, T, U, L) or resistance thermometers (Pt100, Pt200, Ni100), ATEX II 3 G and FM Class I Div 2 approved, 24 V DC rated supply, end-of-life status.","salesMarkdown":"## 8 AI thermocouple / RTD — hazloc-rated end-of-life module The Siemens SM 331 analog input module 6ES7331-7SF00-0AB0 provides 8 analog inputs that can be configured as thermocouple inputs (types B, E, J, K, N, R, S, T, U, L) or as resistance thermometer inputs (Pt100, Pt200, Ni100). This module carries ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc and FM Class I, Division 2, Groups A, B, C, D T4 approvals, confirming it is suitable for installation in Zone 2 gas and Zone 22 dust hazardous areas (ATEX) and Class I Div 2 locations (FM). The ATEX marking includes intrinsic safety entity parameters for the connected field circuits. ## Thermocouple and RTD input flexibility with mV ranges For thermocouple inputs, the module supports millivolt ranges from -25 mV to +25 mV, -50 mV to +50 mV, -80 mV to +80 mV, -250 mV to +250 mV, and -500 mV to +500 mV, as well as a ±1 V range. This covers the full output span of common thermocouple types including the low-level signals from Type T and Type E at cryogenic temperatures. Resistance thermometer inputs (Pt100, Pt200, Ni100) are supported via 4-wire connection for Pt100 and Pt200, eliminating lead resistance error. The module does not provide channel-to-channel isolation, so the common-mode voltage on all inputs must remain within the module's rated limits. The maximum shielded cable length is 200 meters for thermocouple inputs and 50 meters for resistance thermometer inputs. This constraint should be factored into field wiring plans to avoid signal degradation. ## End-of-life sourcing — order against RFQ For replacement planning, verify that any alternative module in the S7-300 family supports the same thermocouple types and RTD configurations, and confirm the ATEX/FM hazardous-area approvals match your installation requirements.","metaTitle":"Siemens 6ES7331-7SF00-0AB0 SM 331 Analog Input, 8 AI","metaDescription":"Siemens SM 331 analog input module, 8 AI for thermocouple and RTD. ATEX II 3 G Ex nA and FM Class I Div 2 approved. End-of-life; order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"Max.":"60 °C","Ni 100":"Yes","Pt 100":"Yes","Pt 200":"Yes","Type B":"Yes","Type E":"Yes","Type J":"Yes","Type K":"Yes","Type L":"Yes","Type N":"Yes","Type R":"Yes","Type S":"Yes","Type T":"Yes","Type U":"Yes","Current":"No","Voltage":"Yes","Overrange":"Yes","FM marking":"Class I, Division 2, Group A, B, C, D T4","Resistance":"Yes","-1 V to +1 V":"Yes","ATEX marking":"ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc","Thermocouple":"Yes","Shielded, Max.":"200 m; TC: 50 m","Test number PTB":"Ex-96.D.2108X","Weight, approx.":"210 g","lifecycle_stage":"eol_hot","-25 mV to +25 mV":"Yes","-50 mV to +50 mV":"Yes","-80 mV to +80 mV":"Yes","Power loss, typ.":"0.6 W","Rated value (DC)":"24 V","-250 mV to +250 mV":"Yes","-500 mV to +500 mV":"Yes","Between The Channels":"No","Diagnostics function":"Yes","Group error SF (red)":"Yes","Resistance thermometer":"Yes","Number of analog inputs":"8; 8x thermocouples; 4x RTD thermoresistors","Po (power output), max.":"41.4 mW","Required Front Connector":"20-pin","Input resistance (Ni 100)":"10 MΩ","Input resistance (Pt 100)":"10 MΩ","Input resistance (Pt 200)":"10 MΩ","Input resistance (Type B)":"10 MΩ","Input resistance (Type E)":"10 MΩ","Input resistance (Type K)":"10 MΩ","Input resistance (Type L)":"10 MΩ","Input resistance (Type N)":"10 MΩ","Input resistance (Type R)":"10 MΩ","Input resistance (Type S)":"10 MΩ","Input resistance (Type T)":"10 MΩ","Input resistance (Type U)":"10 MΩ","Input resistance (type J)":"10 MΩ","Uo (no-load voltage), max.":"5.9 V","Module for Ex(i) protection":"Yes","Channel fault indicator F (red)":"Yes","Diagnostic information readable":"Yes","Input resistance (-1 V to +1 V)":"10 MΩ","from backplane bus 5 V DC, max.":"120 mA","Io (short-circuit current), max.":"28.8 mA","Integration time, parameterizable":"Yes; 2.5 to 100 ms","Input resistance (-25 mV to +25 mV)":"10 MΩ","Input resistance (-50 mV to +50 mV)":"10 MΩ","Input resistance (-80 mV to +80 mV)":"10 MΩ","Input resistance (-250 mV to +250 mV)":"10 MΩ","Input resistance (-500 mV to +500 mV)":"10 MΩ","Between The Channels And Backplane Bus":"Yes","Wire-break in signal transmitter cable":"Yes","Co (permissible external capacity), max.":"43 µF","Short-circuit of the signal encoder cable":"Yes","Lo (permissible external inductivity), max.":"40 mH","For Current Measurement As 2-Wire Transducer":"Yes","For Current Measurement As 4-Wire Transducer":"Yes","Resolution with overrange (bit including sign), max.":"16 bit; 10 bit to 15 bit + sign","Resistance thermometer, relative to input range, (+/-)":"0.008 %; 0.018 ... 0.008%","Interference voltage suppression for interference frequency f1 in Hz":"10 to 400 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$594.36 – $745.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/04ce2e515447eb1631a8bb320e01a17b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=237908&mlfb=6ES7331-7SF00-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7SF00-0AB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 6ES7331-7SF00-0AB0?","answer":"Submit an RFQ to check stock and lead time for your required quantity."},{"question":"Does 6ES7331-7SF00-0AB0 support thermocouple types K and J?","answer":"Yes, the module supports thermocouple types B, E, J, K, N, R, S, T, U, and L. It also supports resistance thermometer inputs (Pt100, Pt200, Ni100)."},{"question":"What are the hazardous-area approvals for 6ES7331-7SF00-0AB0?","answer":"The module carries ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc and FM Class I, Division 2, Groups A, B, C, D T4 approvals, making it suitable for Zone 2 gas, Zone 22 dust, and Class I Div 2 locations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7331-7SF00-0AB0","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/6ES7331-7SF00-0AB0 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}}