{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7331-7HF01-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7331-7HF01-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7331-7HF01-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7331-7HF01-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 331 analog input module, 8 AI, 52 µs per channel, 24 V DC, EOL hot status.","salesMarkdown":"## 8-Channel Analog Input with Fast Conversion The Siemens 6ES7331-7HF01-0AB0 is an 8-channel analog input module for the SIMATIC S7-300 family, offering a basic conversion time of 52 µs per channel — fast enough to capture rapid process changes without missing edges in a high-speed packaging or material-handling line. It accepts a wide set of voltage and current ranges: ±10 V, ±5 V, ±1 V, ±500 mV, ±80 mV, 0–20 mA, 4–20 mA, and ±20 mA, making it a single-slot fit for mixed-signal panels where you need both transducer-level millivolt signals and 4–20 mA loop transmitters. The module draws 100 mA from the 5 V DC backplane bus and requires a 24 V DC field supply with reverse-polarity protection built in — no external diode needed on the field power rail. ## Diagnostics and Alarms for Fault Isolation Parameterizable diagnostic alarms and a limit-value alarm on channels 0 and 2 let the PLC flag a sensor drift or a broken wire. The group error SF (red) LED and readable diagnostic information mean a field-service tech can identify the faulted channel from the cabinet door without a laptop. Channel-to-channel isolation is not provided, so all eight inputs share a common reference — plan the field wiring with a single ground point per module to avoid ground loops. ## Sourcing Reality: EOL Hot Status The module occupies a 40 mm wide slot in the S7-300 DIN-rail mounting rack — the 117 mm depth and 125 mm height match the standard S7-300 envelope, so it fits without recabling the backplane. It requires a 20-pin front connector (ordered separately) for field wiring; the shielded cable length is rated up to 200 m for voltage and current signals. Input resistance is 50 Ω for 0–20 mA and 4–20 mA loops, 100 kΩ for 1–5 V and ±5 V ranges, and 10 MΩ for the ±1 V range — the high-impedance mV ranges draw negligible current from the sensor.","metaTitle":"Siemens 6ES7331-7HF01-0AB0 Analog Input Module, 8 AI","metaDescription":"Siemens 6ES7331-7HF01-0AB0 SIMATIC S7-300 analog input module, 8 channels, 52 µs conversion, EOL hot status. 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","title":"6ES7331-7HF01-0AB0","Height":"125 mm","Current":"Yes","Voltage":"Yes","0 to +10 V":"No","0 to 20 mA":"Yes","1 V to 5 V":"Yes","Resistance":"No","description":"SIMATIC S7-300, Analog input SM 331, isolated, 8 AI, resolution 14 bit, 0.052 ms/channel current, Voltage alarm, diagnostics, 1x 20-pole, suitable for isochronous mode Improved bus cycle time for isochronous mode","-1 V to +1 V":"Yes","-5 V to +5 V":"Yes","Thermocouple":"No","4 mA to 20 mA":"Yes","-10 V to +10 V":"Yes","Shielded, Max.":"200 m","Weight, approx.":"230 g","lifecycle_stage":"eol_hot","-20 mA to +20 mA":"Yes","-80 mV to +80 mV":"Yes","Diagnostic alarm":"Yes; Parameterizable","Power loss, typ.":"1.5 W","Rated value (DC)":"24 V","Limit value alarm":"Yes; Parameterizable, channels 0 and 2","-500 mV to +500 mV":"Yes","Between The Channels":"No","Diagnostics function":"Yes","Group error SF (red)":"Yes","Isolation tested with":"500 V DC","Resistance thermometer":"No","Number of analog inputs":"8","Required Front Connector":"20-pin","Basic conversion time (ms)":"52 µs per channel","Reverse polarity protection":"Yes","Input resistance (0 to 20 mA)":"50 Ω","Input resistance (1 V to 5 V)":"100 kΩ","Diagnostic information readable":"Yes","Input resistance (-1 V to +1 V)":"10 MΩ","Input resistance (-5 V to +5 V)":"100 kΩ","from backplane bus 5 V DC, max.":"100 mA","Input resistance (4 mA to 20 mA)":"50 Ω","Input resistance (-10 V to +10 V)":"100 kΩ","Integration time, parameterizable":"Yes","Input resistance (-20 mA to +20 mA)":"50 Ω","Between The Channels And Backplane Bus":"Yes","Current, relative to input range, (+/-)":"0.2 %","Voltage, relative to input range, (+/-)":"0.25 %","from load voltage L+ (without load), max.":"50 mA","For Current Measurement As 2-Wire Transducer":"Yes","For Current Measurement As 4-Wire Transducer":"Yes","Resolution with overrange (bit including sign), max.":"14 bit; Unipolar: 14 bit; bipolar: 13 bit + sign","Between The Channels And The Power Supply Of The Electronics":"Yes","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","Permissible Input Voltage For Voltage Input (Destruction Limit), Max.":"20 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$762.00 – $1,790.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/55022666c3ec96c12c2d1c7ec62886be.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=168374&mlfb=6ES7331-7HF01-0AB0"},"ai":{"faq":[{"question":"How can I order the Siemens 6ES7331-7HF01-0AB0 and check availability?","answer":"The 6ES7331-7HF01-0AB0 is an EOL hot part sourced to order against an RFQ."},{"question":"What is the resolution of the 6ES7331-7HF01-0AB0?","answer":"The resolution is not listed in the available specifications. The module supports a basic conversion time of 52 µs per channel across its voltage and current ranges."},{"question":"Is the 6ES7331-7HF01-0AB0 compatible with TIA Portal?","answer":"As a standard SIMATIC S7-300 analog input module, it is configurable in TIA Portal through the hardware catalog for S7-300 stations. The diagnostic and alarm parameters are set in the module's device configuration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7331-7HF01-0AB0","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/6ES7331-7HF01-0AB0 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}}