{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7322-1BH81-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7322-1BH81-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7322-1BH81-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7322-1BH81-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SM 322 digital output module, 6ES7322-1BH81-0AA0, 16 DO, 24V DC, 0.5 A, expanded temperature range, 20-pin front connector.","salesMarkdown":"## Output specs and load handling The 6ES7322-1BH81-0AA0: 16 digital outputs, each rated 0.5 A continuous at 24 V DC, with a permissible supply range of 20.4 V to 28.8 V DC. The per-channel current limit is 3 A up to 60 °C, but the 0.5 A continuous rating is the figure that governs steady-state load selection — a solenoid bank or indicator lamp drawing 0.5 A per channel is within the module's thermal budget. Switching frequency is 100 Hz max on resistive or lamp loads; inductive loads are limited to 0.5 Hz. The inductive shutdown voltage is clamped to L+ (-48 V), which protects the output transistor from the flyback spike without an external freewheeling diode. ## S7-300 form factor and isolation Standard S7-300 dimensions: 40 mm wide, 125 mm high, 120 mm deep — it occupies one slot in the mounting rail and mates with a 20-pin front connector (ordered separately). The module draws up to 80 mA from the 5 V DC backplane bus and up to 120 mA from the load voltage L+ (without load). Channel-to-channel isolation is in groups of 8, with optocoupler isolation between the channels and the backplane bus. Isolation is tested at 500 V DC.","metaTitle":"Siemens 6ES7322-1BH81-0AA0 SM 322, 16 DO, 24V DC, 0.5 A","metaDescription":"Siemens 6ES7322-1BH81-0AA0 SM 322 digital output module, 16 channels, 24V DC, 0.5 A, expanded temperature range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Output Modules"],"specifications":{"Depth":"120 mm","Width":"40 mm","Height":"125 mm","Shielded, Max.":"1 000 m","Weight, approx.":"190 g","lifecycle_stage":"eol_hot","Power loss, typ.":"4.9 W","Rated value (DC)":"24 V","Unshielded, Max.":"600 m","On Lamp Load, Max.":"100 Hz","up to 60 °C, max.":"3 A","For Signal \"1\", Min.":"L+ (-0.8 V)","Isolation tested with":"500 V DC","Required Front Connector":"20-pin","Short-circuit protection":"Yes; Electronic","Number of digital outputs":"16","With Inductive Load, Max.":"0.5 Hz","With Resistive Load, Max.":"100 Hz","from backplane bus 5 V DC, max.":"80 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.":"120 mA","Limitation of inductive shutdown voltage to":"L+ (-48 V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=262157&mlfb=6ES7322-1BH81-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7322-1BH81-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for Siemens 6ES7322-1BH81-0AA0?","answer":"No official direct replacement is listed from Siemens. The standard-temperature variant 6ES7322-1BH01-0AA0 is pin-compatible and shares the same 20-pin front connector and S7-300 backplane interface, but it lacks the expanded temperature range rating. For a like-for-like replacement, sourcing the -1BH81 through surplus channels is the only option."},{"question":"Does 6ES7322-1BH81-0AA0 work with S7-300 CPU?","answer":"Yes — this is a standard S7-300 SM 322 digital output module designed for the S7-300 backplane bus. It occupies one slot on the mounting rail and communicates via the 20-pin front connector."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7322-1BH81-0AA0","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/6ES7322-1BH81-0AA0 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}}