{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7521-7EH00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7521-7EH00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7521-7EH00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7521-7EH00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Simatic S7-1500 digital input module 6ES7521-7EH00-0AB0, DI Yes MSI Yes, rated 24/48/125 V AC/DC, depth 129 mm.","salesMarkdown":"## Module overview The Siemens 6ES7521-7EH00-0AB0 is a digital input module for the S7-1500 system, supporting both source/sink inputs and motion-sensing interface (MSI) inputs. Diagnostic alarm, hardware interrupt, and prioritized startup are included. Firmware version V1.0.0 is field-updatable. ## Input voltages and signal thresholds Rated for 24 V, 48 V, and 125 V in both AC (50-60 Hz) and DC variants. Signal '0' spans -5 to +5 V; signal '1' requires +11 to +146 V. Typical input current at 24 V DC is 3 mA. Wire-break detection triggers below 550 µA. Marked as current production. Firmware V1.0.0 includes I&M data (I&M0–I&M3). Available to order against RFQ.","metaTitle":"Siemens 6ES7521-7EH00-0AB0 DI Module, 125 V","metaDescription":"Active production Siemens 6ES7521-7EH00-0AB0 digital input module. Rated for 24/48/125 V AC/DC, diagnostic alarm, firmware V1.0.0. Sourced against RFQ.","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","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":"Yes; To I < 550 µA","Oversampling":"No","2-Wire Sensor":"Yes","Short-circuit":"No","For Signal \"0\"":"-5 ... +5 V","For Signal \"1\"":"+11 ... +146 V","Shielded, Max.":"1 000 m","Parameterizable":"No","Weight, approx.":"240 g","lifecycle_stage":"current","Diagnostic alarm":"Yes","Firmware version":"V1.0.0","Isochronous mode":"No","Power loss, typ.":"2.2 W; At 24 V DC; 6.0 W at 125 V AC","Rated value (AC)":"24 V; 48 V, 125 V (50 - 60 Hz)","Rated value (DC)":"24 V; 48 V, 125 V","Unshielded, Max.":"600 m","Source/sink input":"Yes","FW update possible":"Yes","Hardware interrupt":"Yes","At \"0\" To \"1\", Max.":"20 ms","At \"0\" To \"1\", Min.":"0.05 ms","At \"1\" To \"0\", Max.":"20 ms","At \"1\" To \"0\", Min.":"0.05 ms","Prioritized startup":"Yes","Between The Channels":"Yes","Diagnostics function":"Yes","For Signal \"1\", Typ.":"3 mA; At 24 V DC","HW functional status":"FS01","Isolation tested with":"2 000 V DC","Channel status display":"Yes; green LED","For Module Diagnostics":"Yes; red LED","For Channel Diagnostics":"Yes; red LED","Number of digital inputs":"16","Between Different Circuits":"146 V DC/132 V AC","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":"Yes","Between The Channels, In Groups Of":"1","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":"1.2 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.":"1.5 mA","STEP 7 TIA Portal configurable/integrated from version":"V13 SP1 / -"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$491.61 – $1,181.15","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d17db1fb92360830fd82d42a102a4898.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=644329&mlfb=6ES7521-7EH00-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7521-7EH00-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What are the rated supply voltages?","answer":"The module is rated for 24 V, 48 V, and 125 V AC/DC."},{"question":"Does this module support diagnostic alarms?","answer":"Yes, diagnostic alarm and hardware interrupt are available."},{"question":"What is the physical width and depth?","answer":"Width 35 mm, depth 129 mm, height 147 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7521-7EH00-0AB0","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/6ES7521-7EH00-0AB0 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}}