{"id":1703,"date":"2023-07-24T03:52:16","date_gmt":"2023-07-24T03:52:16","guid":{"rendered":"https:\/\/volleyballvnl.com\/?p=1703"},"modified":"2023-07-24T03:52:16","modified_gmt":"2023-07-24T03:52:16","slug":"electrical-circuit-for-pressure-sensors-when-is-a-sensor-active-and-when-passive","status":"publish","type":"post","link":"https:\/\/volleyballvnl.com\/?p=1703","title":{"rendered":"Electrical circuit for pressure sensors: when is a sensor active, and when passive?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">When using pressure sensors, the output signals 0 ?  <a href=\"http:\/\/rayongonly.com\">Rowdy<\/a> , 4 ? 20 mA and DC 0 ? 10 V are generally chosen in order for the sensor signals to be evaluated and additional processed. Because of this, the signal output of the pressure sensor is usually linked to a corresponding input card in the PLC.<br\/>In this context it could often be confusing, because the day-to-day usage of the terms ?active?, ?passive?, ?current source?, ?voltage source?, ? <a href=\"http:\/\/\u0e04\u0e2d\u0e19\u0e42\u0e17\u0e23\u0e25\u0e27\u0e32\u0e25\u0e4c\u0e27.net\">Tickled<\/a> ? and ?load? are often wildly mixed together. Any electrical signal processing always takes a voltage supply (an ?active part?) and a ?load?, such as a pressure sensor, which represents the ?passive part?. Sometimes the active area of the interconnection is also described as an electrical source\/voltage source and the passive part is referred to as a ?current sink?. To ensure that a power circuit can function, current must flow in a circuit ? even though an instrument is normally known as a load, the current isn&#8217;t consumed because of it, rather it only flows from the existing or voltage source through the load and back to the existing source.<br\/>This works only when an ?energy gap? exists between current source and current sink, therefore the power source operates actively (= sending out current) and the current sink passively (= current flows through it) . Therefore, an interconnection of two current sources or two current sinks won&#8217;t operate normally. This example is complicated in day-to-day application:<br\/>When does a pressure sensor work passively (current sink) and when does it work actively (current source)?<br\/>How does the input card in my own PLC operate?<br\/>As a rule of thumb, one can keep in mind that 2-wire sensors usually work passively and thus need a dynamic PLC input card. It really is difficult with 4-wire sensors, since, for example, a 4-wire flow sensor includes 2 wires for another voltage supply and 2 wires for a dynamic or passive 0\/4 ? 20 mA signal output. It is therefore imperative to check the datasheets for the sensor and PLC input card used.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When using pressure sensors, the output signals 0 ? Rowdy , 4 ? 20 mA and DC 0 ? 10 V are generally chosen in order for the sensor signals to be evaluated and additional processed. Because of this, the signal output of the pressure sensor is usually linked to a corresponding input card in [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1703","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/posts\/1703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1703"}],"version-history":[{"count":1,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/posts\/1703\/revisions"}],"predecessor-version":[{"id":1704,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=\/wp\/v2\/posts\/1703\/revisions\/1704"}],"wp:attachment":[{"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/volleyballvnl.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}