{"id":6528,"date":"2023-09-18T17:40:36","date_gmt":"2023-09-18T09:40:36","guid":{"rendered":"https:\/\/www.dcl-controls.com\/?p=6528"},"modified":"2025-03-31T07:10:42","modified_gmt":"2025-03-31T07:10:42","slug":"actuator-immunity-4-20ma-vs-2-10v","status":"publish","type":"post","link":"https:\/\/dclactuator.com\/sv_se\/stod\/ta-acutator\/stalldonsimmunitet-4-20ma-vs-2-10v","title":{"rendered":"J\u00e4mf\u00f6relse av prestanda f\u00f6r st\u00f6rningsresistens: 4-20mA VS. 2-10V"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"6528\" class=\"elementor elementor-6528\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c4425ee elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"c4425ee\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-592bf2f\" data-id=\"592bf2f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2d2988c elementor-widget elementor-widget-text-editor\" data-id=\"2d2988c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Vid till\u00e4mpning av elektriska st\u00e4lldons anti-interferensprestanda \u00f6vertr\u00e4ffar den analoga 4-20mA-signalen betydligt den analoga 2-10V-signalen. Varf\u00f6r \u00e4r det s\u00e5?<\/p><h2>2-10V signalanalys<\/h2><p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium\" src=\"\/wp-content\/uploads\/2023\/09\/dcl-2-10v-cn.webp\" width=\"1920\" height=\"1027\" \/><\/p><p><strong>Anti-interferensdiagram f\u00f6r 2-10V-signal (DCL Huayi Intelligent Control)<\/strong><\/p><p>Som visas i diagrammet ovan:<\/p><p>Vid anv\u00e4ndning av 2\u201310 V \u00e4r ing\u00e5ngsstr\u00f6mmen mycket l\u00e5g (0,059 mA \u2013 0,29 mA) p\u00e5 grund av modulens h\u00f6gre ing\u00e5ngsmotst\u00e5nd (R=34 K). Resultatet blir att signal-brusf\u00f6rh\u00e5llandet l\u00e4ngs denna bana \u00e4r mycket l\u00e5gt, vilket inneb\u00e4r att den konduktiva och str\u00e5lningsst\u00f6rningss\u00e4kra prestandan \u00e4r d\u00e5lig. Med andra ord, ur ett elektroniskt designperspektiv \u00e4r detta den mest s\u00e5rbara delen.<\/p><p>I signalv\u00e4gen 2\u201310 V kan utg\u00e5ngsenheten endast s\u00e4kerst\u00e4lla att utg\u00e5ngssp\u00e4nningen (Vo) \u00e4r korrekt p\u00e5 regulatorsidan (eftersom sp\u00e4nnings\u00e5terkopplingspunkten \u00e4r n\u00e4ra utg\u00e5ngsstiftet). \u00c5 andra sidan kan ing\u00e5ngssp\u00e4nningen (Vi) p\u00e5 st\u00e4lldonsidan inte garanteras vara korrekt, eftersom <span class=\"katex\">Vi=Vo+Vbrus+VmarkdiffVi = Vo + V_{brus} + V_{markdiff}<\/span>, var <span class=\"katex\">VbrusV_{brus}<\/span> och <span class=\"katex\">Vground\u2212diffV_{ground-diff}<\/span> \u00e4r mycket k\u00e4nsliga f\u00f6r st\u00f6rningar, vilket orsakar tillf\u00e4lliga f\u00f6r\u00e4ndringar som \u00e4r oundvikliga.<\/p><p>L\u00e4ngden p\u00e5 2-10V-signalkabeln, dess interna resistans och sk\u00e4rmnings\u00e5tg\u00e4rder p\u00e5verkar avsev\u00e4rt 2-10V-signalens st\u00f6rningsskydd. Ju l\u00e4ngre kabeln \u00e4r, desto h\u00f6gre intern resistans och ju s\u00e4mre sk\u00e4rmningen \u00e4r, desto s\u00e4mre \u00e4r 2-10V-signalens motst\u00e5nd mot st\u00f6rningar. D\u00e4rf\u00f6r anv\u00e4nds 2-10V ofta f\u00f6r kommunikation \u00f6ver mycket korta avst\u00e5nd.<\/p><h2>4\u201320 mA signalanalys<\/h2><p><img decoding=\"async\" class=\"alignnone size-medium\" src=\"\/wp-content\/uploads\/2023\/09\/dcl-4-20ma-cn.webp\" width=\"1920\" height=\"1026\" \/><\/p><p><strong>Anti-interferensdiagram f\u00f6r 4-20mA-signal (DCL Huayi Intelligent Control)<\/strong><\/p><p>J\u00e4mf\u00f6rt med 2\u201310 V \u00e5tg\u00e4rdar 4\u201320 mA tv\u00e5 kritiska svagheter hos 2\u201310 V-signalen. Som visas i diagrammet ovan:<\/p><p>N\u00e4r man anv\u00e4nder 4\u201320 mA, p\u00e5 grund av modulens l\u00e4gre ing\u00e5ngsmotst\u00e5nd (R=120 ohm), \u00e4r ing\u00e5ngssignalstr\u00f6mmen relativt h\u00f6g (4 mA\u201320 mA). Detta resulterar i ett h\u00f6gre signal-brusf\u00f6rh\u00e5llande l\u00e4ngs denna v\u00e4g, vilket inneb\u00e4r att den konduktiva och str\u00e5lningsst\u00f6rningseffektiviteten \u00e4r b\u00e4ttre. Som ett resultat \u00e4r 4\u201320 mA-signalen mycket sv\u00e5rare att st\u00f6ra.<\/p><p>I 4-20mA-signalv\u00e4gen kan utg\u00e5ngsenheten s\u00e4kerst\u00e4lla att hela utg\u00e5ngsslingstr\u00f6mmen \u00e4r korrekt, inklusive b\u00e5de str\u00f6mmen p\u00e5 utg\u00e5ngssidan och str\u00f6mmen vid st\u00e4lldonets ing\u00e5ng. Detta beror p\u00e5 att \u00e5terkopplingsm\u00e5let f\u00f6r utg\u00e5ngskretsen \u00e4r str\u00f6mmen vid 4-20mA-slingans utg\u00e5ngs\u00e4nde, och str\u00f6mmen \u00e4r lika stor genom hela signalslingan. D\u00e4rf\u00f6r m\u00e5ste str\u00f6mmen som samplas vid st\u00e4lldonets \u00e4nde vara densamma som utg\u00e5ngsstr\u00f6mmen fr\u00e5n styrenheten. \u00c4ven vid st\u00f6rningar och inkonsekvenser i jordpotentialen kan 4-20mA-utg\u00e5ngskretsen s\u00e4kerst\u00e4lla att signalstr\u00f6mmen \u00e4r korrekt genom aktiv negativ \u00e5terkopplingsjustering.<\/p><p>L\u00e4ngden p\u00e5 4-20mA-signalkabeln och dess interna resistans har liten inverkan p\u00e5 4-20mA-signalens st\u00f6rningsmotst\u00e5nd. D\u00e4rf\u00f6r anv\u00e4nds 4-20mA ofta f\u00f6r l\u00e5ngdistanskommunikation.<\/p><h2>Slutsats<\/h2><p>Sammanfattningsvis har 4\u201320 mA-signalen betydligt b\u00e4ttre prestanda mot st\u00f6rningar \u00e4n 2\u201310 V-signalen i industriella milj\u00f6er. Detta g\u00e4ller \u00e4ven f\u00f6r till\u00e4mpningar som involverar elektriska st\u00e4lldon.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Vid till\u00e4mpning av elektriska st\u00e4lldons antist\u00f6rningsprestanda \u00f6vertr\u00e4ffar den analoga 4-20mA-signalen den analoga 2-10V-signalen avsev\u00e4rt. Varf\u00f6r \u00e4r detta fallet? 2-10V Signal Analysis Anti-interference Diagram f\u00f6r 2-10V Signal (DCL Huayi Intelligent Control) Som visas i diagrammet ovan: N\u00e4r du anv\u00e4nder 2-10V, p\u00e5 grund av det h\u00f6gre ing\u00e5ngsmotst\u00e5ndet p\u00e5 modulen (R = 34K), [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":true,"footnotes":""},"categories":[8],"tags":[49],"class_list":["post-6528","post","type-post","status-publish","format-standard","hentry","category-ta-acutator","tag-input-signal"],"acf":[],"_links":{"self":[{"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/posts\/6528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/comments?post=6528"}],"version-history":[{"count":0,"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/posts\/6528\/revisions"}],"wp:attachment":[{"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/media?parent=6528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/categories?post=6528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dclactuator.com\/sv_se\/wp-json\/wp\/v2\/tags?post=6528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}