{"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:\/\/dclcontrols.com\/sk_sk\/podpora\/ta-acutator\/imunita-aktuatora-4-20-ma-vs-2-10-v","title":{"rendered":"Porovnanie odolnosti vo\u010di ru\u0161eniu: 4 \u2013 20 mA VS. 2 \u2013 10 V"},"content":{"rendered":"
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Pri pou\u017eit\u00ed elektrick\u00fdch aktu\u00e1torov na ochranu proti ru\u0161eniu anal\u00f3gov\u00fd sign\u00e1l 4 \u2013 20 mA v\u00fdrazne prevy\u0161uje anal\u00f3gov\u00fd sign\u00e1l 2 \u2013 10 V. Pre\u010do je to tak?<\/p>

Anal\u00fdza sign\u00e1lu 2 \u2013 10 V<\/h2>

<\/p>

Sch\u00e9ma ochrany pred ru\u0161en\u00edm pre sign\u00e1l 2 \u2013 10 V (inteligentn\u00e9 riadenie DCL Huayi)<\/strong><\/p>

Ako je zn\u00e1zornen\u00e9 na diagrame vy\u0161\u0161ie:<\/p>

Pri pou\u017eit\u00ed 2-10V je vstupn\u00fd sign\u00e1lov\u00fd pr\u00fad v d\u00f4sledku vy\u0161\u0161ieho vstupn\u00e9ho odporu modulu (R=34K) ve\u013emi n\u00edzky (0,059mA \u2013 0,29mA). V\u00fdsledkom je, \u017ee pomer sign\u00e1lu k \u0161umu pozd\u013a\u017e tejto cesty je ve\u013emi n\u00edzky, \u010do znamen\u00e1 slab\u00fa vodiv\u00fa a radia\u010dn\u00fa ochranu pred ru\u0161en\u00edm. In\u00fdmi slovami, z h\u013eadiska elektronick\u00e9ho n\u00e1vrhu je to najzranite\u013enej\u0161ia \u010das\u0165.<\/p>

V sign\u00e1lovej ceste 2-10V m\u00f4\u017ee v\u00fdstupn\u00e9 zariadenie zabezpe\u010di\u0165 spr\u00e1vnos\u0165 v\u00fdstupn\u00e9ho nap\u00e4tia (Vo) iba na strane regul\u00e1tora (preto\u017ee bod sp\u00e4tnej v\u00e4zby nap\u00e4tia je bl\u00edzko v\u00fdstupn\u00e9ho pinu). Na druhej strane, nie je mo\u017en\u00e9 zaru\u010di\u0165 spr\u00e1vnos\u0165 vstupn\u00e9ho nap\u00e4tia (Vi) na strane aktu\u00e1tora, preto\u017ee Vi=Vo+V\u0161um+Vzem\u2212rozdielVi = Vo + V_{\u0161um} + V_{rozdiel-zem}<\/span>, kde V\u0161umV_{\u0161um}<\/span> a Vground\u2212diffV_{ground-diff}<\/span> s\u00fa vysoko n\u00e1chyln\u00e9 na ru\u0161enie, \u010do sp\u00f4sobuje prechodn\u00e9 zmeny, ktor\u00fdm sa ned\u00e1 vyhn\u00fa\u0165.<\/p>

D\u013a\u017eka sign\u00e1lneho k\u00e1bla 2-10V, jeho vn\u00fatorn\u00fd odpor a tieniace opatrenia v\u00fdznamne ovplyv\u0148uj\u00fa odolnos\u0165 sign\u00e1lu 2-10V vo\u010di ru\u0161eniu. \u010c\u00edm dlh\u0161\u00ed je k\u00e1bel, t\u00fdm vy\u0161\u0161\u00ed je vn\u00fatorn\u00fd odpor a \u010d\u00edm hor\u0161ie je tienenie, t\u00fdm hor\u0161ia je odolnos\u0165 sign\u00e1lu 2-10V vo\u010di ru\u0161eniu. Preto sa 2-10V be\u017ene pou\u017e\u00edva na komunik\u00e1ciu na ve\u013emi kr\u00e1tke vzdialenosti.<\/p>

Anal\u00fdza sign\u00e1lu 4 \u2013 20 mA<\/h2>

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Diagram ochrany pred ru\u0161en\u00edm pre sign\u00e1l 4 \u2013 20 mA (inteligentn\u00e9 riadenie DCL Huayi)<\/strong><\/p>

V porovnan\u00ed s 2-10V, 4-20mA rie\u0161i dve kritick\u00e9 slabiny sign\u00e1lu 2-10V. Ako je zn\u00e1zornen\u00e9 na diagrame vy\u0161\u0161ie:<\/p>

Pri pou\u017eit\u00ed 4-20mA je vstupn\u00fd sign\u00e1lov\u00fd pr\u00fad v d\u00f4sledku ni\u017e\u0161ieho vstupn\u00e9ho odporu modulu (R=120 ohmov) relat\u00edvne vysok\u00fd (4mA \u2013 20mA). To m\u00e1 za n\u00e1sledok vy\u0161\u0161\u00ed pomer sign\u00e1lu k \u0161umu pozd\u013a\u017e tejto dr\u00e1hy, \u010do znamen\u00e1 lep\u0161iu vodiv\u00fa a radia\u010dn\u00fa ochranu pred ru\u0161en\u00edm. V d\u00f4sledku toho je sign\u00e1l 4-20mA ove\u013ea \u0165a\u017e\u0161ie ru\u0161i\u0165.<\/p>

V sign\u00e1lovej ceste 4-20 mA dok\u00e1\u017ee v\u00fdstupn\u00e9 zariadenie zabezpe\u010di\u0165 spr\u00e1vnos\u0165 cel\u00e9ho pr\u00fadu v\u00fdstupnej slu\u010dky vr\u00e1tane pr\u00fadu na v\u00fdstupnej strane aj pr\u00fadu na vstupe ak\u010dn\u00e9ho \u010dlena. Je to preto, \u017ee cie\u013eom vzorkovania sp\u00e4tnej v\u00e4zby v\u00fdstupn\u00e9ho obvodu je pr\u00fad na v\u00fdstupnom konci slu\u010dky 4-20 mA a pr\u00fad je v celej sign\u00e1lovej slu\u010dke rovnak\u00fd. Preto mus\u00ed by\u0165 pr\u00fad vzorkovan\u00fd na konci ak\u010dn\u00e9ho \u010dlena rovnak\u00fd ako v\u00fdstupn\u00fd pr\u00fad z regul\u00e1tora. Aj v pr\u00edpade ru\u0161enia a nekonzistentnosti potenci\u00e1lu zeme dok\u00e1\u017ee v\u00fdstupn\u00fd obvod 4-20 mA zabezpe\u010di\u0165 spr\u00e1vnos\u0165 sign\u00e1lneho pr\u00fadu prostredn\u00edctvom akt\u00edvneho nastavenia negat\u00edvnej sp\u00e4tnej v\u00e4zby.<\/p>

D\u013a\u017eka sign\u00e1lneho k\u00e1bla 4-20mA a jeho vn\u00fatorn\u00fd odpor maj\u00fa mal\u00fd vplyv na odolnos\u0165 sign\u00e1lu 4-20mA vo\u010di ru\u0161eniu. Preto sa 4-20mA be\u017ene pou\u017e\u00edva na komunik\u00e1ciu na dlh\u00e9 vzdialenosti.<\/p>

Z\u00e1ver<\/h2>

Z\u00e1verom mo\u017eno poveda\u0165, \u017ee sign\u00e1l 4 \u2013 20 mA m\u00e1 v priemyselnom prostred\u00ed v\u00fdrazne lep\u0161iu ochranu pred ru\u0161en\u00edm ako sign\u00e1l 2 \u2013 10 V. To plat\u00ed aj pre aplik\u00e1cie zah\u0155\u0148aj\u00face elektrick\u00e9 aktu\u00e1tory.<\/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":"

In the application of electric actuators’ anti-interference performance, the 4-20mA analog signal significantly outperforms the 2-10V analog signal. Why is this the case? 2-10V Signal Analysis Anti-interference Diagram for 2-10V Signal (DCL Huayi Intelligent Control) As shown in the diagram above: When using 2-10V, due to the higher input resistance on the module (R=34K), the […]<\/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:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/posts\/6528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/comments?post=6528"}],"version-history":[{"count":0,"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/posts\/6528\/revisions"}],"wp:attachment":[{"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/media?parent=6528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/categories?post=6528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dclcontrols.com\/sk_sk\/wp-json\/wp\/v2\/tags?post=6528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}