{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HMISTO531","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"HMISTO531","canonicalUrl":"https://aoctrl.com/schneider/HMISTO531","factsUrl":"https://aoctrl.com/api/mcp/products/HMISTO531","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Harmony STO HMISTO531 HMI operator interface, 3.4\" monochrome STN LCD, 200 x 80 pixels, green/orange/red backlight, analogue touch panel, 24 VDC, 5 W, IP65 front panel, NEMA 4X, Modbus TCP/IP, 16 MB application memory.","salesMarkdown":"## Overview The HMISTO531 is a Schneider Harmony STO compact HMI with a 3.4-inch monochrome STN LCD display at 200 x 80 pixel resolution, backlit in green, orange, and red. It runs on a 24 VDC supply drawing 5 W and includes an analogue touch panel with 16 contrast levels. Application memory is 16 MB with 128 kB backup for data retention. Communication is via a 10/100BASE-TX Ethernet port supporting Modbus TCP/IP, XWAY, and third-party protocols. Compared to the HMISTO511, the HMISTO531 shares the same 3.4-inch monochrome display and 200 x 80 resolution but offers a larger application memory (16 MB vs. 8 MB) and a higher shock rating (15 gn vs. 10 gn).","metaTitle":"Schneider HMISTO531 Harmony STO HMI, 3.4\" monochrome, 200x80, IP65","metaDescription":"Schneider HMISTO531 Harmony STO HMI: 3.4\" monochrome STN LCD, 200x80 pixels, 16 MB app memory, 24 VDC, 5 W, IP65 front, NEMA 4X, Modbus TCP/IP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Supply":"External source","Marking":"CE","Category":"US10MC222569","Contrast":"16 levels via touch panel","Standards":"FCC Class A UL 1604 UL 508 IEC 61000-6-2 EN 61131-2","Brightness":"8 levels","Fixing mode":"By 2 spring clips 1.6...5 mm thick panel","Touch panel":"Analogue","Display Type":"Backlit monochrome STN LCD","Display size":"3.4 inch","Port Ethernet":"10/100BASE-TX","Character font":"Chinese (simplified Chinese) Korean Taiwanese (traditional Chinese) Japanese (ANK, Kanji) ASCII","Inrush current":"30 A","Processor name":"CPU RISC","Realtime clock":"Access to the PLC real-time clock","Number of pages":"Limited by internal memory capacity","lifecycle_stage":"current","Local signalling":"1 LED (green) for normal operation","Range of Product":"Harmony STO & STU","Shock resistance":"15 gn 11 msIEC 60068-2-27","Background colour":"Green, orange and red","Relative humidity":"0...90 % without condensation","Backlight lifespan":"10000 hours red 50000 hours orange 50000 hours green","Display Resolution":"200 x 80 pixels","Enclosure Material":"PPT","Memory description":"Application memory 16 MB Back up of data 128 kB","Operating altitude":"<= 6561.68 ft (2000 m)","Processor frequency":"333 MHz","Vibration resistance":"+/- 3.5 mm 5...9 Hz) IEC 60068-2-6 1 gn 9...150 Hz) IEC 60068-2-6","Nbr. of units in pkg.":"1","Downloadable protocols":"XWAY TCP/IP Modbus TCP/IP Third party protocols","Power Consumption in W":"5 W","IP degree of protection":"IP20 IEC 60529 rear panel) IP65 IEC 60529 front panel)","Immunity to microbreaks":"3 ms","NEMA degree of protection":"NEMA 4X front panel indoor use)","Product or Component Type":"Touch panel screen","[Us] rated supply voltage":"24 V DC +/- 20 %","Integrated connection type":"1 USB 2.0 type mini B 1 USB 2.0 type A power supply - removable screw terminal block 1 Ethernet TCP/IP - 1 RJ45","Electromagnetic compatibility":"Resistance to radiated electromagnetic fields - test level: 10 V/m conforming to IEC 61000-4-3","Ambient Air Temperature for Storage":"-4...140 °F (-20...60 °C)","Ambient Air Temperature for Operation":"32...122 °F (0...50 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$974.60","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7f033a09ee255966365bc5ba9fabd72b.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/HMISTO531/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/HMISTO531","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/HMISTO531 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}