{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7338-7XF00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7338-7XF00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7338-7XF00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7338-7XF00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SM 338 IQ-Sense module, 6ES7338-7XF00-0AB0, 8 digital inputs, 24 V DC, 2.5 W, 120 x 40 x 125 mm, 20-pin front connector.","salesMarkdown":"## What it does — IQ-Sense sensor interface The 6ES7338-7XF00-0AB0: The SM 338 connects up to eight IQ-Sense photoelectric proximity switches or ultrasonic sensors, reading their digital status on the S7-300 backplane. Cycle time runs 2.88 to 6 ms per channel — fast enough for part-present and level-detection loops on a conveyor or crusher feed, but not for high-speed counting. Each input is 24 V DC, and the module draws 120 mA typical from the 5 V backplane bus plus 2.5 W total power loss. That 2.5 W is the heat you need to vent in a sealed panel — it is not much, but in a densely packed S7-300 rack with multiple modules, the cumulative thermal load matters. The module measures 120 mm deep, 40 mm wide, and 125 mm tall — standard S7-300 single-width format. It requires a 20-pin front connector (sold separately) for field wiring. The 40 mm width leaves room alongside other slices in the DIN-rail rack, but the depth means you need at least 130 mm clearance behind the mounting panel for the connector and wiring loom. ## Status and diagnostics Each channel has a green status LED for digital input indication. A red group-error SF LED flags a fault on any connected sensor or the module itself. Isolation between channels and the backplane bus is tested at 500 V DC — channel-to-channel isolation is not provided, so all inputs share a common reference.","metaTitle":"Siemens 6ES7338-7XF00-0AB0 SM 338 IQ-Sense, 8 Inputs, 24 V","metaDescription":"Siemens 6ES7338-7XF00-0AB0 SM 338 IQ-Sense module, 8 digital inputs at 24 V, 2.5 W. End-of-life spare part — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Input Modules"],"specifications":{"Depth":"120 mm","Width":"40 mm","Height":"125 mm","Description":"photoelectronic proximity switches and ultrasonic sensors with IQ-Sense, cycle time 2.88 to 6 ms","Weight, approx.":"250 g","lifecycle_stage":"eol_hot","Power loss, typ.":"2.5 W","Rated value (DC)":"24 V","Unshielded, Max.":"50 m","Between The Channels":"No","Group error SF (red)":"Yes","Isolation tested with":"500 V DC","Number of digital inputs":"8","Required Front Connector":"20-pin","from backplane bus 5 V DC, max.":"120 mA; Typical","Between The Channels And Backplane Bus":"Yes","Status indicator digital input (green)":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$156.21","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=300995&mlfb=6ES7338-7XF00-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7338-7XF00-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What sensors does the SM 338 work with?","answer":"It connects up to eight IQ-Sense photoelectric proximity switches and ultrasonic sensors. The IQ-Sense interface handles both the power and the digital status signal over a single cable."},{"question":"Will 6ES7338-7XF00-0AB0 drop into a panel specified around 3RV2021-1GA25?","answer":"No — those are completely different classes. The 3RV2021-1GA25 is a SIRIUS motor-protective circuit breaker; the SM 338 is an S7-300 I/O module. They serve different functions and mount on different DIN rails."},{"question":"What is the depth and width of this module?","answer":"The module is 120 mm deep, 40 mm wide, and 125 mm tall. It takes a 20-pin front connector."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7338-7XF00-0AB0","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/6ES7338-7XF00-0AB0 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}}