{"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":"2025-04-18T14:33:56","modified_gmt":"2025-04-18T06:33:56","slug":"actuator-immunity-4-20ma-vs-2-10v","status":"publish","type":"post","link":"https:\/\/www.dcl-controls.com\/is_is\/support\/ta-actuator\/actuator-immunity-4-20ma-vs-2-10v","title":{"rendered":"St\u00f3r keppni fyrir anti-truflunum \u00e1rangur rafmagns kallar (4-20mA M\u00d3TI 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-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c4425ee\" data-element_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\">\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-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>\u00cd ums\u00f3kn af anti-truflunum af rafmagns kallar, anti-truflunum \u00e1rangur me\u00f0 4-20mA hli\u00f0st\u00e6\u00f0um merki er miklu betra en a\u00f0 nota 2-10V hli\u00f0st\u00e6\u00f0um merki. Hvers vegna?<\/p><ul><li><a href=\"#2-10v\"><span style=\"text-decoration: underline;\">2-10V merki greiningu<\/span><\/a><\/li><li><a href=\"#ff\"><span style=\"text-decoration: underline;\">4-20mA merki greiningu<\/span><\/a><\/li><li><span style=\"text-decoration: underline;\">ni\u00f0urst\u00f6\u00f0u<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dbd312d elementor-widget elementor-widget-heading\" data-id=\"dbd312d\" data-element_type=\"widget\" id=\"2-10v\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">2-10V merki greiningu<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a6737d1 elementor-widget elementor-widget-image\" data-id=\"a6737d1\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1920\" height=\"1027\" src=\"https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-2-10v-cn.webp\" class=\"attachment-full size-full wp-image-6532\" alt=\"2-10V\u6297\u5e72\u6270\u793a\u610f\u56fe\uff08DCL \u534e\u6613\u667a\u63a7\uff09\" srcset=\"https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-2-10v-cn.webp 1920w, https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-2-10v-cn-1536x822.webp 1536w, https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-2-10v-cn-18x10.webp 18w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0362964 elementor-widget elementor-widget-text-editor\" data-id=\"0362964\" data-element_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>Eins og s\u00e9st \u00ed myndinni ofan: \u00ed<\/p><ol><li>\u00deegar vi\u00f0 notum 2-10V, vegna \u00feess a\u00f0 h\u00e1r inntak m\u00f3tst\u00f6\u00f0u \u00e1 m\u00e1t (R=34K), inntak merki n\u00faverandi er mj\u00f6g l\u00e1gt (0.059 mA-0.29 mamma). \u00deess vegna er merki til h\u00e1va\u00f0a hlutfall \u00e1 \u00feessari braut er mj\u00f6g l\u00e1gt, sem \u00fe\u00fd\u00f0ir a\u00f0 lei\u00f0ni og geislun anti-truflunum \u00e1rangur er l\u00e9leg. Me\u00f0 \u00f6\u00f0rum or\u00f0um, fr\u00e1 sj\u00f3narh\u00f3li rafr\u00e6n hanna, \u00feetta er verst hluti.<\/li><li>\u00c1 2-10V merki lei\u00f0, framlei\u00f0sla t\u00e6ki getur a\u00f0eins a\u00f0 tryggja r\u00e9ttm\u00e6ti framlei\u00f0sla spennu (Vo) \u00e1 stj\u00f3rnandi hli\u00f0 (vegna \u00feess a\u00f0 spenna vi\u00f0br\u00f6g\u00f0 li\u00f0 er n\u00e1l\u00e6gt framlei\u00f0slu pinna). \u00devert \u00e1 m\u00f3ti, inntak spenna (Vi) \u00e1 drifi\u00f0 megin er ekki h\u00e6gt a\u00f0 tryggja a\u00f0 vera r\u00e9tt, vegna \u00feess a\u00f0 Vi=Vo+Vnoise+Vground-diff, Vnoise og Vground-diff eru mj\u00f6g n\u00e6m fyrir truflunum og framlei\u00f0a t\u00edmabundin breytingar, sem ekki er h\u00e6gt a\u00f0 for\u00f0ast.<\/li><li>Lengd, innri vi\u00f0n\u00e1m og verja r\u00e1\u00f0stafanir \u00ed 2-10V merki sn\u00faruna sem mun hafa \u00e1hrif \u00e1 verulega anti-truflunum \u00e1rangur 2-10V merki. \u00dev\u00ed lengur sem vi\u00f0 cable, \u00fev\u00ed meiri innri vi\u00f0n\u00e1m sn\u00faruna, og verri verja r\u00e1\u00f0stafanir, verra anti-truflunum \u00e1rangur 2-10V merki. \u00dev\u00ed 2-10V er algengt fyrir mj\u00f6g stutt-svi\u00f0 samskipti.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b3d927a elementor-widget elementor-widget-heading\" data-id=\"b3d927a\" data-element_type=\"widget\" id=\"4-20ma\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">4-20mA merki greiningu<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-52bf554 elementor-widget elementor-widget-image\" data-id=\"52bf554\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1920\" height=\"1026\" src=\"https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-4-20ma-cn.webp\" class=\"attachment-full size-full wp-image-6530\" alt=\"4-20mA\u6297\u5e72\u6270\u793a\u610f\u56fe\uff08DCL \u534e\u6613\u667a\u63a7\uff09\" srcset=\"https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-4-20ma-cn.webp 1920w, https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-4-20ma-cn-1536x821.webp 1536w, https:\/\/www.dcl-controls.com\/content\/dam\/tech\/images\/dcl-4-20ma-cn-18x10.webp 18w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffdf34a elementor-widget elementor-widget-text-editor\" data-id=\"ffdf34a\" data-element_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>Mi\u00f0a\u00f0 vi\u00f0 2-10V, 4-20mA leysa \u00ed tv\u00f6 banv\u00e6n veikleika 2-10V merki. Eins og s\u00e9st \u00ed myndinni ofan: \u00ed<\/p><ol><li>\u00deegar vi\u00f0 notum 4-20mA, vegna \u00feess a\u00f0 l\u00e1gt inntak m\u00f3tst\u00f6\u00f0u \u00e1 m\u00e1t (R=120 ohm), inntak merki n\u00faverandi er tilt\u00f6lulega st\u00f3r (4mA-20mA). \u00deess vegna er merki til h\u00e1va\u00f0a hlutfall \u00e1 \u00feessari braut er mj\u00f6g h\u00e1r, sem \u00fe\u00fd\u00f0ir a\u00f0 lei\u00f0ni og geislun anti-truflunum \u00e1rangur er betra. \u00dev\u00ed \u00fea\u00f0 er erfitt fyrir 4-20mA merki l\u00ednu til a\u00f0 trufla \u00ed st\u00f3rum hlutfall.<\/li><li>\u00a0\u00c1 merki um lei\u00f0 4-20mA, framlei\u00f0sla t\u00e6ki getur tryggja r\u00e9tt \u00e1 \u00f6llu framlei\u00f0sla lykkja n\u00faverandi, \u00fear \u00e1 me\u00f0al n\u00faverandi \u00e1 framlei\u00f0sla hli\u00f0 og n\u00faverandi \u00e1 inntak drifi\u00f0. Vegna \u00feess a\u00f0 vi\u00f0br\u00f6g\u00f0 s\u00fdnat\u00f6ku mi\u00f0a framlei\u00f0sla hringr\u00e1s er n\u00faverandi \u00e1 framlei\u00f0sla 4-20mA lykkja, n\u00faverandi er alveg samb\u00e6rilegt \u00ed \u00f6llu merki lykkju. \u00deess vegna n\u00faverandi s\u00fdni \u00e1 drifi\u00f0 terminal ver\u00f0ur a\u00f0 vera n\u00faverandi framlei\u00f0sla \u00e1 a\u00f0 stj\u00f3rna flugst\u00f6\u00f0inni. Jafnvel \u00ed n\u00e6rveru truflunum og \u00f3samr\u00e6mi j\u00f6r\u00f0u, 4-20mA framlei\u00f0sla hringr\u00e1s h\u00e6gt a\u00f0 breyta me\u00f0 virk neikv\u00e6\u00f0 vi\u00f0br\u00f6g\u00f0 til a\u00f0 tryggja r\u00e9ttm\u00e6ti merki n\u00faverandi.<\/li><li>Lengd og innri vi\u00f0n\u00e1m 4-20mA merki ka\u00f0all hef sm\u00e1 \u00e1hrif \u00e1 anti-truflunum \u00e1rangur 4-20mA. \u00dev\u00ed 4-20mA er algengt fyrir langa-fjarl\u00e6g\u00f0 samskipti.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1cfccba elementor-widget elementor-widget-heading\" data-id=\"1cfccba\" data-element_type=\"widget\" id=\"conclusion\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ni\u00f0urst\u00f6\u00f0u<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e38325 elementor-widget elementor-widget-text-editor\" data-id=\"9e38325\" data-element_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>\u00cd stuttu m\u00e1li, anti-truflunum \u00e1rangur 4-20mA merki \u00ed i\u00f0na\u00f0i svi\u00f0i er talsvert betra en \u00ed 2-10V merki. \u00deetta er l\u00edka satt \u00ed ums\u00f3kn a\u00f0st\u00e6\u00f0ur rafmagns kallar.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-affdae5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"affdae5\" data-element_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-25 elementor-inner-column elementor-element elementor-element-2f8ba00\" data-id=\"2f8ba00\" data-element_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-3093316 elementor-align-left elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"3093316\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/is_is\/tech-enquiry\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">T\u00e6knilega samr\u00e1\u00f0i<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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<div class=\"elementor-column elementor-col-25 elementor-inner-column elementor-element elementor-element-02c6b03\" data-id=\"02c6b03\" data-element_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-e0a3c3a elementor-align-left elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"e0a3c3a\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/is_is\/where-to-buy\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Til vara<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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<div class=\"elementor-column elementor-col-25 elementor-inner-column elementor-element elementor-element-885dead\" data-id=\"885dead\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-inner-column elementor-element elementor-element-09dd98c\" data-id=\"09dd98c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\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 class=\"elementor-element elementor-element-2faeafb elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"2faeafb\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-192baa1 elementor-widget elementor-widget-text-editor\" data-id=\"192baa1\" data-element_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>Tengjast t\u00e6knilega greinar: \u00ed<\/p><ul><li><a href=\"\/is_is\/tech\/why-voltage-signal-oscillate\/\">Af hverju er spenna-tegund merki sveiflast undir \u00e1kve\u00f0nar a\u00f0st\u00e6\u00f0ur?<\/a><\/li><\/ul><p>Tengjast t\u00e6knilega sta\u00f0la<\/p><ul><li><a href=\"\/is_is\/tech\/gb-t-3369-1-2008-iec-60381-1-1982\/\">GB\/T 3369.1\u20142008\/r\u00e1\u00f0gj\u00f6f var\u00f0andi 60381-1:1982 Hli\u00f0st\u00e6\u00f0um merki fyrir ferli eftirlitskerfi-Hluti 1: ST n\u00faverandi merki<\/a><\/li><li><a href=\"\/is_is\/tech\/gb-t-3369-2-2008-iec-60381-2-1978\/\">GB\/T 3369.2\u20142008\/r\u00e1\u00f0gj\u00f6f var\u00f0andi 60381-2:1978 Hli\u00f0st\u00e6\u00f0um merki fyrir ferli eftirlitskerfi-Hluti 2: ST spenna merki<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aea6233 elementor-widget elementor-widget-text-editor\" data-id=\"aea6233\" data-element_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><span style=\"text-decoration: underline;\"><a href=\"#top\">Aftur \u00e1 toppinn<\/a><\/span><\/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>\u5728\u7535\u52a8\u6267\u884c\u5668\u6297\u5e72\u6270\u7684\u5e94\u7528\u4e2d\uff0c\u4f7f\u75284-20mA\u6a21\u62df\u4fe1\u53f7\u6bd4\u4f7f\u75282-10V\u6a21\u62df\u4fe1\u53f7\u7684\u6297\u5e72\u6270\u6027\u80fd\u597d\u975e\u5e38\u591a\uff0c\u4e3a\u4ec0\u4e48\uff1f 2 [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6529,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[334],"tags":[44,34,390,42,373,41],"class_list":["post-6528","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ta-actuator","tag-fast-move-actuator","tag-actuator","tag-tech-ref","tag-general-actuator","tag-very-small-actuator-tag","tag-explosion-proof-actuator"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/posts\/6528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/comments?post=6528"}],"version-history":[{"count":0,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/posts\/6528\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/media\/6529"}],"wp:attachment":[{"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/media?parent=6528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/categories?post=6528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dcl-controls.com\/is_is\/wp-json\/wp\/v2\/tags?post=6528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}