{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7323-1BH81-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7323-1BH81-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7323-1BH81-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7323-1BH81-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 323, 8 digital inputs / 8 digital outputs, 24V DC, 0.5A per output, optically isolated, expanded temperature range, 20-pin front connector required.","salesMarkdown":"## End-of-life — plan the swap now The 6ES7323-1BH81-0AA0: No stock-holding claim. ## What this SM 323 module does The 6ES7323-1BH81-0AA0 is a SIMATIC S7-300 digital combination module: 8 inputs and 8 outputs on one 40 mm-wide unit. It is optically isolated between the channels and the backplane bus. Rated supply is 24 V DC (20.4 V to 28.8 V permissible range). Each output delivers 500 mA rated value, with a total current limit of 2 A across all eight outputs, derated to 4 A at 60 °C. Inputs accept 2-wire sensors; signal \"1\" threshold is 13 to 30 V, signal \"0\" is -30 to +5 V. Typical input current at signal \"1\" is 7 mA. ## Wiring and integration notes Requires a 20-pin front connector (sold separately). The module snaps onto the S7-300 DIN rail and connects to the backplane bus via the standard ribbon connector. Outputs switch resistive loads up to 100 Hz and inductive loads up to 0.5 Hz. Inductive shutdown voltage is clamped to L+ (-48 V). ## Sourcing this EOL module Because the 6ES7323-1BH81-0AA0 is EOL, the primary channel is the independent surplus and new-old-stock market. Confirm the BOM position count and the mating half before committing. Power consumption: 4.5 W typical, drawing 40 mA from the 5 V DC backplane bus and up to 20 mA from the load voltage L+ (unloaded).","metaTitle":"Siemens 6ES7323-1BH81-0AA0 SM 323, 8DI/8DO, 24V DC, 0.5A","metaDescription":"Siemens SM 323 digital module for S7-300, 8 inputs / 8 outputs, 24V DC, 0.5A per output, 2A total. End-of-life. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"Depth":"120 mm","Width":"40 mm","Height":"125 mm","2-Wire Sensor":"Yes","For Signal \"0\"":"-30 to +5V","For Signal \"1\"":"13 to 30V","Shielded, Max.":"1 000 m","Weight, approx.":"220 g","lifecycle_stage":"eol_hot","Power loss, typ.":"4.5 W","Rated value (DC)":"24 V","Unshielded, Max.":"600 m","On Lamp Load, Max.":"100 Hz","up to 60 °C, max.":"4 A","At \"0\" To \"1\", Max.":"4.8 ms","At \"0\" To \"1\", Min.":"1.2 ms","For Signal \"1\", Min.":"L+ (-0.8 V)","For Signal \"1\", Typ.":"7 mA","Isolation tested with":"500 V DC","Number of digital inputs":"8","Required Front Connector":"20-pin","Number of digital outputs":"8","With Inductive Load, Max.":"0.5 Hz","With Resistive Load, Max.":"100 Hz","For Signal \"1\" Rated Value":"500 mA","from backplane bus 5 V DC, max.":"40 mA","Between The Channels, In Groups Of":"8","For Signal \"1\" Minimum Load Current":"5 mA","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","For Signal \"0\" Residual Current, Max.":"0.5 mA","Between The Channels And Backplane Bus":"Yes; Optocoupler","from load voltage L+ (without load), max.":"20 mA","Limitation of inductive shutdown voltage to":"L+ (-48 V)","Permissible Quiescent Current (2-Wire Sensor), Max.":"2 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$245.11","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=410401&mlfb=6ES7323-1BH81-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7323-1BH81-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the Siemens 6ES7323-1BH81-0AA0?","answer":"No stock-holding claim; the order is placed per the BOM quantity."},{"question":"What is the difference between 6ES7323-1BH81-0AA0 and the older 6ES7323-1BH80-0AA0?","answer":"The 6ES7323-1BH81-0AA0 is the expanded temperature range variant of the standard SM 323. The key difference is the wider ambient operating range. Electrically, the I/O ratings are identical: 8 inputs, 8 outputs, 24 V DC, 0.5 A per output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7323-1BH81-0AA0","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/6ES7323-1BH81-0AA0 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}}