{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7331-7TB00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7331-7TB00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7331-7TB00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7TB00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 331 analog input module, 2 AI, HART, Ex(i), 24 V DC, 2-wire, 4 to 20 mA, FM/ATEX, 6ES7331-7TB00-0AB0.","salesMarkdown":"## What this module does in a hazardous-area loop The Siemens 6ES7331-7TB00-0AB0 is a 2-channel analog input module designed for intrinsically safe (Ex(i)) 2-wire transmitters in hazardous locations. It accepts 0 to 20 mA or 4 to 20 mA signals, with HART communication active on both channels — indicated by a green LED per channel. The module carries FM approval for Class I, Division 2, Groups A–D T4 and ATEX marking II3 (2) G Eex nA [ib] IIC T4, so it slots into Zone 2 installations with Ex(i) loop-powered field devices without an external barrier. ## End-of-life — sourcing reality No pin-compatible drop-in replacement from Siemens has been published for this exact Ex(i) variant. ## Integration into an S7-300 rack The module occupies one slot in an S7-300 rack — 40 mm wide, 125 mm high, 120 mm deep — and draws 100 mA from the 5 V DC backplane bus plus 4.5 W from the 24 V DC load voltage L+. It is compatible with ET200M distributed I/O via an IM 153-2 interface module, which is the typical deployment for hazardous-area remote I/O. Channel-to-channel isolation is 1 500 V AC, and isolation between channels and the backplane bus is 500 V DC. The 50 Ω input resistance on the 4 to 20 mA range means the loop burden is low enough for most 2-wire transmitters to drive without exceeding compliance voltage. ## Sigma-delta conversion with configurable integration The module uses a sigma-delta measurement principle with parameterizable integration times: 2.5 ms, 16.67 ms, 20 ms, or 100 ms. The 16.67 ms and 20 ms settings reject 60 Hz and 50 Hz line noise respectively — a practical choice when the module shares a panel with VFDs or switching power supplies. Diagnostics are fully parameterizable: a red SF group-error LED, a red F channel-fault LED per channel, and configurable limit-value alarms on channels 0 and 1. Overrange is indicated by a red LED and a signal flag.","metaTitle":"Siemens 6ES7331-7TB00-0AB0 Analog Input Module, 2 AI, HART","metaDescription":"Siemens 6ES7331-7TB00-0AB0 analog input module, 2 channels, HART active, Ex(i) protection, FM/ATEX rated. End-of-life — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"Max.":"60 °C","Min.":"0 °C","Depth":"120 mm","Width":"40 mm","title":"6ES7331-7TB00-0AB0","Height":"125 mm","Overrange":"Yes; red LED, signal","0 to 20 mA":"Yes","FM marking":"Class I, Division 2, Group A, B, C, D T4; Class I, Zone 2, Group IIC T4","FM approval":"Available soon","description":"********** Replacement part ********* SIMATIC DP, HART analog input SM 331, 2 AI, 0/4 - 20 mA HART, to HART rev. 5.0, for ET200M with IM 153-2, 1 x 20-pole","ATEX marking":"II3 (2) G Eex nA [ib] IIC T4","4 mA to 20 mA":"Yes","Shielded, Max.":"400 m","Weight, approx.":"260 g","lifecycle_stage":"eol_hot","Between channels":"1 500 V AC","Diagnostic alarm":"Yes; Parameterizable","Power loss, typ.":"4.5 W","Rated value (DC)":"24 V","Limit value alarm":"Yes; Parameterizable, channels 0 and 1","Short-Circuit Proof":"Yes; approx. 30 mA","Between The Channels":"Yes","Diagnostics function":"Yes; can be set in parameters, red LED, alarm message","Group error SF (red)":"Yes","Integration time (ms)":"2,5 / 16,67 / 20 / 100 ms","Measurement principle":"Sigma Delta","Number of analog inputs":"2","Po (power output), max.":"511 mW","between the inputs (UCM)":"60 V DC/30 V AC","HART communication active":"Yes; green LED (H)","Uo (no-load voltage), max.":"26 V","Module for Ex(i) protection":"Yes","Reverse polarity protection":"Yes","Input resistance (0 to 20 mA)":"50 Ω","Channel fault indicator F (red)":"Yes","from backplane bus 5 V DC, max.":"100 mA","Input resistance (4 mA to 20 mA)":"50 Ω","Io (short-circuit current), max.":"96.1 mA","Integration time, parameterizable":"Yes","Load voltage L+ against backplane bus":"500 V DC","Between The Channels And Backplane Bus":"Yes","Wire-break in signal transmitter cable":"Yes; red LED, signal","Current, relative to input range, (+/-)":"0.1 %; From 0/4 to 20 mA","Co (permissible external capacity), max.":"62 nF","Short-circuit of the signal encoder cable":"Yes; red LED, signal","from load voltage L+ (without load), max.":"180 mA","Lo (permissible external inductivity), max.":"3 mH","For Current Measurement As 2-Wire Transducer":"Yes","For Current Measurement As 4-Wire Transducer":"Yes","Channels against backplane bus and load voltage L+":"1 500 V AC","Product Function / Supply Voltage For Transmitters":"Yes","Resolution with overrange (bit including sign), max.":"16 bit; 10 bit to 15 bit + sign","Basic conversion time, including integration time (ms)":"2.5 / 16.67 / 20 / 100 (1 channel enabled); 7.5 / 50 / 60 / 300 (2 channels enabled)","Um (voltage at non-intrinsically safe connecting terminals), max.":"250 V; DC","Interference voltage suppression for interference frequency f1 in Hz":"10 / 50 / 60 / 400 Hz","Permissible Input Current For Current Input (Destruction Limit), Max.":"40 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$192.02","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/aa98043430345f30f576ec74f153f551.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=110116&mlfb=6ES7331-7TB00-0AB0"},"ai":{"faq":[{"question":"Does 6ES7331-7TB00-0AB0 support HART?","answer":"Yes. HART communication is active on both channels, indicated by a green LED per channel. The module supports HART pass-through for configuration and process variable readback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7331-7TB00-0AB0","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/6ES7331-7TB00-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}