{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7331-7TF01-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7331-7TF01-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7331-7TF01-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7TF01-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SM 331 analog input module, 6ES7331-7TF01-0AB0, 8 analog inputs, 14-bit resolution, 24 VDC, 40 x 125 x 117 mm, EOL hot.","salesMarkdown":"## 8 analog inputs, 14-bit, Sigma Delta — what it means for a legacy S7-300 rack The Siemens 6ES7331-7TF01-0AB0 is an SM 331 analog input module with 8 differential current inputs, each digitised by a Sigma Delta converter to 14-bit resolution. It occupies a single S7-300 slot, 40 mm wide, and draws 60 mA from the 24 VDC load supply plus 120 mA from the 5 VDC backplane bus. The 20-ms integration time at 50 Hz rejects mains ripple cleanly — the module is parameterisable to 16.6 ms at 60 Hz or 100 ms for higher noise suppression. Each channel accepts 0 to 20 mA or 4 to 20 mA signals with a 140 Ω input resistance, and the module supports both 2-wire and 4-wire transducers. Shielded cable runs up to 800 m are within spec, which covers most field-to-panel distances in a plant. The 20-pin front connector is ordered separately — the module does not ship with one. ## EOL hot — the spare decision you need to make now For a critical spare, the decision is straightforward: buy one now and keep it in the cabinet before the line needs it. ## Panel fit and wiring — 40 mm slot, 20-pin front connector Dimensions are 40 mm wide, 125 mm high, 117 mm deep — it occupies one slot and leaves room for airflow in a crowded enclosure. IP20 rated, so it belongs in a clean, dry cabinet, not in a washdown zone. Wiring terminates on a 20-pin front connector (type 6ES7392-1AJ00-0AA0 or equivalent). Each channel pair uses the same return path — there is no channel-to-channel isolation, so shared return wiring is the norm. The module is short-circuit proof on the input side, and a group error SF LED (red) plus per-channel fault indicators give fast diagnostics when a loop goes down.","metaTitle":"Siemens 6ES7331-7TF01-0AB0 SM 331 AI 8x14 Bit, EOL Hot","metaDescription":"Siemens 6ES7331-7TF01-0AB0 SM 331 analog input module, 8 AI, 14-bit, 24 VDC, 40x125x117 mm. End-of-life (EOL hot) — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"Depth":"117 mm","Width":"40 mm","Height":"125 mm","Step: low":"Yes","0 to 20 mA":"Yes","Step: High":"Yes","Step: None":"Yes","Step: Medium":"Yes","Shielded, Max.":"800 m","Parameterizable":"Yes","Weight, approx.":"205 g","lifecycle_stage":"eol_hot","Diagnostic alarm":"Yes","Isochronous mode":"No","Power loss, typ.":"1.5 W","Rated value (DC)":"24 V","Limit value alarm":"Yes","Short-Circuit Proof":"Yes","Between The Channels":"No","Diagnostics function":"Yes","Group error SF (red)":"Yes","Supply current, max.":"60 mA","Integration time (ms)":"20 ms at 50 Hz; 16.6 ms at 60 Hz; 100 ms at 100 Hz","Isolation tested with":"500 V DC","Measurement principle":"Sigma Delta","IP degree of protection":"IP20","Number of analog inputs":"8","Required Front Connector":"20-pin","Reverse polarity protection":"Yes","Input resistance (0 to 20 mA)":"140 Ω","Channel fault indicator F (red)":"Yes","from backplane bus 5 V DC, max.":"120 mA","Input resistance (4 mA to 20 mA)":"140 Ω","Integration time, parameterizable":"Yes","Input resistance (-20 mA to +20 mA)":"140 Ω","Between The Channels And Backplane Bus":"Yes","Current, relative to input range, (+/-)":"0.1 %","from load voltage L+ (without load), max.":"20 mA","For Current Measurement As 2-Wire Transducer":"Yes","For Current Measurement As 4-Wire Transducer":"Yes","Product Function / Supply Voltage For Transmitters":"Yes","Resolution with overrange (bit including sign), max.":"16 bit","Basic conversion time, including integration time (ms)":"55 ms @ 60 Hz, 65 ms @ 50 Hz, 305 ms @ 100 Hz","Interference voltage suppression for interference frequency f1 in Hz":"10 / 50 / 60 Hz","Permissible Input Current For Current Input (Destruction Limit), Max.":"40 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$889.00 – $973.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=238904&mlfb=6ES7331-7TF01-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7TF01-0AB0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7331-7TF01-0AB0","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/6ES7331-7TF01-0AB0 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}}