{"id":132,"date":"2011-08-24T06:34:54","date_gmt":"2011-08-24T04:34:54","guid":{"rendered":"https:\/\/blog.wika.com\/en\/?p=132"},"modified":"2022-11-08T08:37:10","modified_gmt":"2022-11-08T07:37:10","slug":"4-20-ma-2-wire-3-wire","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/","title":{"rendered":"Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors"},"content":{"rendered":"<p><strong>What exactly is the difference between the 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of the user: An output signal in 2-wire technology means:<\/strong><\/p>\n<ul>\n<li>less wiring required<\/li>\n<li>better EMC protection, since interferences can be filtered more easily<\/li>\n<li>better protection against wiring errors<\/li>\n<\/ul>\n<p>The only advantage of 3-wire technology is that higher ohmic loads are possible, i.e., the current loop can also be operated on a measuring instrument of relatively high input impedance. Conclusion: With the exception of a high ohmic load requirement, 4-20 mA in 2-wire technology offers the user clear advantages- also over other signals, such as 0-10 V.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What exactly is the difference between the 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of the user: An output signal in 2-wire technology means: less wiring required better EMC protection, since interferences can be filtered more easily better protection against wiring errors The only advantage [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":9923,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[220],"tags":[267,77],"class_list":["post-132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pressure-products","tag-electrical-connection","tag-pressure-sensor"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Difference of 4-20 mA in 2-wire &amp; 3-wire technology - WIKA blog<\/title>\n<meta name=\"description\" content=\"With the exception of a high ohmic load requirement, 4-20 mA in 2-wire technology offers the user clear advantages - also over other signals, such as 0-10 V.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Difference of 4-20 mA in 2-wire &amp; 3-wire technology - WIKA blog\" \/>\n<meta property=\"og:description\" content=\"With the exception of a high ohmic load requirement, 4-20 mA in 2-wire technology offers the user clear advantages - also over other signals, such as 0-10 V.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\" \/>\n<meta property=\"og:site_name\" content=\"WIKA blog\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.wika.com\/en\/files\/2020\/11\/2-3-wire.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1134\" \/>\n\t<meta property=\"og:image:height\" content=\"443\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Mich\u00e8le Beyer\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mich\u00e8le Beyer\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\"},\"author\":{\"name\":\"Mich\u00e8le Beyer\",\"@id\":\"https:\/\/blog.wika.com\/en\/#\/schema\/person\/13ca97d373c6de6a796587c8d415527a\"},\"headline\":\"Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors\",\"datePublished\":\"2011-08-24T04:34:54+00:00\",\"dateModified\":\"2022-11-08T07:37:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\"},\"wordCount\":123,\"image\":{\"@id\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.wika.com\/en\/files\/2020\/11\/2-3-wire.jpg\",\"keywords\":[\"Electrical connection\",\"Pressure sensor\"],\"articleSection\":[\"Pressure\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\",\"url\":\"https:\/\/blog.wika.com\/en\/products\/pressure-products\/4-20-ma-2-wire-3-wire\/\",\"name\":\"Difference of 4-20 mA in 2-wire & 3-wire technology - 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