[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-662942-105":59,"doc-detail-662942-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","sel-421-protection-automation-control-front-and-rear-panel-diagrams","SEL-421 Protection Automation Control - Front and Rear Panel Diagrams","","This document provides detailed front and rear panel diagrams for the SEL-421 Protection Automation Control device manufactured by Schweitzer Engineering Laboratories, Inc. It illustrates various mounting configurations, including 3U, 4U, and 5U options for both rack and panel mounting. The technical illustrations highlight the arrangement of output connectors, EIA-232 communication ports, terminal blocks, and monitoring interfaces, serving as a comprehensive visual guide for engineers and technicians involved in equipment installation and wiring.",{"@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/sel-421-protection-automation-control-front-and-rear-panel-diagrams/662942/",{"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/sel-421-protection-automation-control-front-and-rear-panel-diagrams/662942.png","ImageObject",300,407,{"name":92,"@type":93},"I feel Different","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does the SEL-421 front panel include?","Question",{"text":112,"@type":113},"The front panel features status indicators for trip, communication schemes, zone protection, phase and ground fault detection, as well as control buttons for relay testing, breaker operation, and setting adjustments.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What connection options are provided on the rear panels?",{"text":117,"@type":113},"The rear panels include various terminal blocks for I/O connections, multiple EIA-232 communication ports (Port 1, 2, 3), and dedicated terminals for power and monitoring.",{"name":119,"@type":110,"acceptedAnswer":120},"What device configurations are covered in the diagrams?",{"text":121,"@type":113},"The diagrams cover 3U, 4U, and 5U form factors with options for both rack-mount and panel-mount installations, as well as specific configurations for different Main Board and I/O board setups.","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},662942,1793223599,{"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":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"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":39},962093541761,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","21  \nFront-and Rear-Panel Diagrams  \n3U Front Panel, Rack-Mount Option  \ni3347c  \n4U Front Panel, Panel-Mount Option  \ni3353b  \n5U Front Panel, Panel-Mount Option  \nFigure 22 Typical SEL-421 Front-Panel Diagrams  \ni4091a  \nSchweitzer Engineering Laboratories, Inc. SEL-421 Data Sheet  \n22  \n4U Rear Panel, Main Board A, Connectorized® Option, INT5 I/O Board  \nI3375c  \n5U Rear Panel, With Space for Additional I/O Boards  \nFigure 23 Typical SEL-421 Rear-Panel Diagrams  \ni3363c  \nSEL-421 Data Sheet Schweitzer Engineering Laboratories, Inc.  \n23  \n5U Rear Panel, Main Board B, INT3 and INT1 I/O Interface Board  \ni4149a  \n5U Rear Panel, Main Board B, INT2 and INT7 I/O Interface Board  \nFigure 24 Additional Typical Rear Panel Drawings  \ni4150a  \nSchweitzer Engineering Laboratories, Inc. SEL-421 Data Sheet","cbCaikR9VGQaJQX4","https://ap.wps.com/l/cbCaikR9VGQaJQX4","pdf",783907,"English","# SEL-421 Front-Panel Diagrams\n## 3U, 4U, and 5U Configurations\n# SEL-421 Rear-Panel Diagrams\n## Main Board and I/O Interface Configurations","[{\"question\":\"What does the SEL-421 front panel include?\",\"answer\":\"The front panel features status indicators for trip, communication schemes, zone protection, phase and ground fault detection, as well as control buttons for relay testing, breaker operation, and setting adjustments.\"},{\"question\":\"What connection options are provided on the rear panels?\",\"answer\":\"The rear panels include various terminal blocks for I/O connections, multiple EIA-232 communication ports (Port 1, 2, 3), and dedicated terminals for power and monitoring.\"},{\"question\":\"What device configurations are covered in the diagrams?\",\"answer\":\"The diagrams cover 3U, 4U, and 5U form factors with options for both rack-mount and panel-mount installations, as well as specific configurations for different Main Board and I/O board setups.\"}]","SEL-421 Protection Automation Control - Front and Rear Panel Diagrams | PDF"]