[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-656249-105":59,"doc-detail-656249-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","isa112-scada-systems-model-architecture-draft","ISA112 - SCADA Systems Model Architecture - DRAFT","","ISA112 SCADA Systems model architecture draft diagram outlines layered network and control organization, including field devices and sensor networks, local controllers, supervisory controllers, controllers and communication servers, and application components. It highlights enterprise, control, and process information networks, plus external and backhaul network considerations. Notes address routing and firewall omission between layers, remote cloud communications requiring extreme care, and guidance to avoid direct connections for remote applications using ISA/IEC-62443 zone and conduit implementation, with a Purdue level 5 reference clarification.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/isa112-scada-systems-model-architecture-draft/656249/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/isa112-scada-systems-model-architecture-draft/656249.png","ImageObject",300,407,{"name":92,"@type":93},"aboduw","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-02","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What architecture elements are shown in the ISA112 SCADA model diagram?","Question",{"text":112,"@type":113},"The diagram presents field sensor networks and field devices, controller network components (local controllers and supervisory controllers), communication servers, and applications across enterprise, process information, and control networks.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why is a Purdue Level 5 included in the reference model?",{"text":117,"@type":113},"The draft states a Purdue Level 5 is shown even though the true Purdue Model traditionally has levels 0–4, because it did not anticipate external applications.",{"name":119,"@type":110,"acceptedAnswer":120},"What guidance is given for remote-hosted external applications (e.g., cloud)?",{"text":121,"@type":113},"It warns that communications for remote-hosted external applications must be done using extreme care, and it strongly discourages direct connections for remote applications, referring to ISA/IEC-62443 for an appropriate zone/conduit implementation.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},656249,1792967218,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":8,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":81},3985747862266,"https://ap-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45","ISA112 SCADA System Model Architecture Diagram – DRAFT (subject to change)  \nISA112 – SCADA Systems Standards Committee – International Society of Automation (ISA)– [www.isa.org/isa112/](www.isa.org/isa112/)  \nK  \n\n| J | \u003Cbr>Enterprise Network | (Note 5) |\n| --- | --- | --- |\n\nI  \nH  \n| G |  HMI  Alarms & Events Historian\u003Cbr>|  | |  |\n| --- | --- | --- | --- | --- |\n| F | Drivers\u003Cbr>|  | Databases |  |\n|  |  |  |  |  |\n|  |  |  |  |  |\n\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| C ~~ ~~ ~~ ~~\u003Cbr>|  |  |  |  |  |  |  | |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n\nE  \nD  \nB  \nA  \nNotes:  \nBackhaul networks  \nSite n  \nExternal Network  \nEnterprise Network  \nProcess Information Network  \nControl Network  \nApplications  \nCommunication Servers  \nWide Area Network  \nController Network  \nLocal Controllers  \nField Sensor networks  \nField Devices  \nSuperv isory Controllers  \n1 Letters are used to avoid potential conflict with ISA-95 and other “Layer” models.  \n2 Routers and Firewalls between layers are not shown.  \n3 Other system-specific servers, applications ,and workstations are not shown.  \n4 Communications for any remote-hosted external applications (Cloud) with lower levels must be done using extreme care.  \n5 The use of direct-connections for remote applications is strongly discouraged. Refer to ISA/IEC-62443 for guidance on an appropriate zone/conduit implementation.  \n* We show a Purdue Level 5. The true Purdue Model only has levels 0-4 because it did not anticipate external applications.  \nLevel 5*  \nLevel 4  \nLevel 3  \nLevel 2  \nLevel 1  \nLevel 0  \nCurrent Working Draft Revision May 28, 2020  \nPurdue Reference Model  \nNote: This is an interim working draft from the ISA112 SCADA Systems standards committee, as of 2020-06-15. This diagram is still subject to change.","cbCaii7q3dIEw31U","https://ap.wps.com/l/cbCaii7q3dIEw31U","pdf",211985,"English","# Purdue Reference Model\n## Notes and Network Layers","[{\"question\":\"What architecture elements are shown in the ISA112 SCADA model diagram?\",\"answer\":\"The diagram presents field sensor networks and field devices, controller network components (local controllers and supervisory controllers), communication servers, and applications across enterprise, process information, and control networks.\"},{\"question\":\"Why is a Purdue Level 5 included in the reference model?\",\"answer\":\"The draft states a Purdue Level 5 is shown even though the true Purdue Model traditionally has levels 0–4, because it did not anticipate external applications.\"},{\"question\":\"What guidance is given for remote-hosted external applications (e.g., cloud)?\",\"answer\":\"It warns that communications for remote-hosted external applications must be done using extreme care, and it strongly discourages direct connections for remote applications, referring to ISA/IEC-62443 for an appropriate zone/conduit implementation.\"}]","ISA112 - SCADA Systems Model Architecture - DRAFT | PDF"]