{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3321-2AA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3321-2AA10","canonicalUrl":"https://aoctrl.com/siemens/3RK3321-2AA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3321-2AA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK3321-2AA10 expansion module, 8 digital inputs, 24 VDC, spring-loaded terminals, 22.5 mm width, IP20, for 3RK32 and 3RK33 systems.","salesMarkdown":"The Siemens 3RK3321-2AA10 is a SIRIUS expansion module for the 3RK32 and 3RK33 modular safety system families, adding 8 digital inputs in a 22.5 mm-wide housing. It is designed to snap onto a DIN rail and is powered by a 24 VDC control supply. The spring-loaded terminals accept conductors without tools, which speeds panel wiring and reduces the risk of loose connections under vibration. The 124 mm depth and 105 mm height are typical for this series; verify clearance against the cabinet door and adjacent wiring ducts. The 24 VDC control supply is common across the system, and the module draws its power from the backplane bus, so no separate supply wiring is needed for the inputs. ## Environmental and electrical robustness It withstands shock at 15g for 11 ms and vibration per IEC 60068-2-6 from 5 to 500 Hz at 0.75 mm amplitude. ESD immunity is 4 kV contact / 8 kV air discharge, and burst immunity on power ports is 2 kV per IEC 61000-4-4. Operating humidity range is 10 to 95 % RH, and installation altitude is up to 2 000 m above sea level. The module supports monitored start-up, a safety-system feature that checks the input circuit integrity before enabling the safety function. It does not provide parameterizable outputs, emergency-off function, protective door monitoring, or evaluation for enabling switches, selector switches, two-hand operator panels, or electro-sensitive protective equipment. It has no outputs for testing contact-based sensors. These are pure input expansion modules — all safety logic and output functions are handled by the base unit (3RK32 or 3RK33) they connect to.","metaTitle":"Siemens 3RK3321-2AA10 SIRIUS Expansion Module, 8 DI, 24 VDC,","metaDescription":"Siemens 3RK3321-2AA10 SIRIUS expansion module, 8 digital inputs, 24 VDC, spring-loaded terminals, 22.5 mm width, IP20. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Safety Relays"],"specifications":{"Depth":"124 mm","Width":"22.5 mm","title":"3RK3321-2AA10","Height":"105 mm","2-Channel":"0","description":"Siemens 3RK3321-2AA10 expansion module, 8 digital inputs, 22.5 mm width, IP20, spring-loaded terminals, for 3RK32 and 3RK33 systems, RoHS since 01-05-12.","Safety-Related":"0","Single Channel":"0","Type Of Voltage":"DC","lifecycle_stage":"current","Fastening Method":"DIN rail","Product Category":"Modular Safety System","Shock Resistance":"15g / 11 ms","Mounting Position":"vertical","Monitored Start-Up":"Yes","Non-Safety-Related":"0","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","protection class IP":"IP20","Design Of The Product":"8 DI","EMERGENCY OFF function":"No","Parameterizable Outputs":"No","Safety-Related 2-Channel":"0","Protective Door Monitoring":"No","Evaluation: Enabling Switch":"No","Evaluation: Selector Switch":"No","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"spring-loaded terminals","Insulation Voltage Rated Value":"50 V","Relative Humidity During Operation":"10 ... 95 %","Evaluation: Two-Hand Operator Panel":"No","Surge Voltage Resistance Rated Value":"500 V","due to burst according to IEC 61000-4-4":"2 kV (power ports)","reference code according to IEC 81346-2":"K","Touch Protection Against Electrical Shock":"finger-safe","control supply voltage 1 at DC rated value":"24 V","vibration resistance according to IEC 60068-2-6":"5 ... 500 Hz: 0.75 mm","Evaluation: Electro-Sensitive Protective Equipment":"No","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Number Of Outputs For Testing Contact-Based Sensors":"0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$137.16","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ad879d7d404518fc875bad3167929993.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=159836&mlfb=3RK3321-2AA10"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RK3321-2AA10?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ against this order code through the storefront; the part is sourced and quoted to order through independent distribution channels."},{"question":"What is 3RK3321-2AA10's listed width?","answer":"The listed width is 22.5 mm, which is the standard single-slot footprint for SIRIUS modular components on a DIN rail."},{"question":"What compliance documentation does this part carry?","answer":"The module is RoHS-compliant with a substance prohibition date of 05/01/2012. It is designed to meet IEC 61000-4-2 (ESD), IEC 61000-4-4 (burst), and IEC 60068-2-6 (vibration) standards. The IP20 rating and finger-safe touch protection are verified per IEC 60529 and relevant safety standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3321-2AA10","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/3RK3321-2AA10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}