{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7521-1FH00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7521-1FH00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7521-1FH00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7521-1FH00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-1500, digital input module, 16 digital inputs, AC 120/230 V, MSI, 35 x 147 x 129 mm (WxHxD), current lifecycle.","salesMarkdown":"The 6ES7521-1FH00-0AA0 is a 16-channel digital input module for SIMATIC S7-1500 systems, accepting AC signals from 0 to 264 V AC. Rated input at 120/230 V AC, it reads line-level field devices without step-down transformers. Every channel scans in under 25 ms, configurable for source or sink wiring (P-reading). Power draw is a typical 4.9 W, so thermal load in a packed cabinet is modest. I&M data 0–3 is included for asset tagging. ## Integration Notes Mounts on S7-1500 DIN rail (35 mm width, 129 mm depth, 147 mm height). No shielded cable required up to 1 000 m; unshielded max 600 m. Signal '0' threshold 0–40 V AC, signal '1' 79–264 V AC. Typical input current 11 mA at 230 V AC, 5.5 mA at 120 V AC. Firmware V2.0.0, field-upgradable. Isolation tested at 3 100 V DC between channels and backplane; 500 V AC between channels themselves. The green RUN and channel status LEDs give quick visual on power and each input.","metaTitle":"Siemens 6ES7521-1FH00-0AA0 Digital Input Module, 16DI AC, 12","metaDescription":"Active Siemens S7-1500 16-channel digital input module. AC 120/230V, 35mm width, 4.9W. Compatible with 2- and 3-wire sensors. Sourced to order. RFQ for lead times.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Digital Input Modules"],"specifications":{"DI":"Yes","MSI":"Yes","Depth":"129 mm","Width":"35 mm","title":"6ES7521-1FH00-0AA0","Height":"147 mm","Counter":"No","RUN LED":"Yes; green LED","I&M data":"Yes; I&M0 to I&M3","ERROR LED":"Yes; red LED","Wire-break":"No","description":"SIMATIC S7-1500, digital input module DI 16x230 V AC BA, 16 channels in groups of 4; Input delay 20 ms; Input type 1 (IEC 61131): Front connector (screw terminals or push-in) to be ordered separately","2-Wire Sensor":"Yes","Short-circuit":"No","For Signal \"0\"":"0V AC to 40V AC","For Signal \"1\"":"79V AC to 264V AC","Shielded, Max.":"1 000 m","Parameterizable":"No","Weight, approx.":"300 g","lifecycle_stage":"current","Diagnostic alarm":"No","Firmware version":"V2.0.0","Isochronous mode":"No","Power loss, typ.":"4.9 W","Rated value (AC)":"230 V; 120/230 V AC, 50/60 Hz","Unshielded, Max.":"600 m","Source/sink input":"P-reading","FW update possible":"Yes","Hardware interrupt":"No","At \"0\" To \"1\", Max.":"25 ms","At \"1\" To \"0\", Max.":"25 ms","Prioritized startup":"Yes","Between The Channels":"No","Diagnostics function":"No","For Signal \"1\", Typ.":"11 mA; At 230 V AC and 5.5 mA at 120 V AC","HW functional status":"FS01","Isolation tested with":"3 100 V DC","Channel status display":"Yes; green LED","For Module Diagnostics":"Yes; red LED","For Channel Diagnostics":"No","Number of digital inputs":"16","Between Different Circuits":"250 V AC between the channels and the backplane bus; 500 V AC between the channels","Vertical Installation, Max.":"40 °C","Vertical Installation, Min.":"0 °C","Horizontal Installation, Max.":"60 °C","Horizontal Installation, Min.":"0 °C","Monitoring the supply voltage":"No","Suitable for safety functions":"No","Digital inputs, parameterizable":"No","Between The Channels, In Groups Of":"4","Between The Channels And Backplane Bus":"Yes","PROFIBUS from GSD version/GSD revision":"V1.0 / V5.1","PROFINET from GSD version/GSD revision":"V2.3 / -","Power available from the backplane bus":"1 W","Monitoring of the supply voltage (PWR-LED)":"No","STEP 7 configurable/integrated from version":"V5.5 SP3 / -","Permissible Quiescent Current (2-Wire Sensor), Max.":"2 mA","STEP 7 TIA Portal configurable/integrated from version":"V12 / V12"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$162.56","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/280249ed9a1cbf9f24e2efdc40f36e32.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=490003&mlfb=6ES7521-1FH00-0AA0"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Width 35 mm, height 147 mm, depth 129 mm. Suitable for standard DIN-rail mounting in S7-1500 racks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7521-1FH00-0AA0","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/6ES7521-1FH00-0AA0 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}}