{"id":71069,"date":"2020-02-23T22:07:58","date_gmt":"2020-02-23T19:07:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti"},"modified":"2020-03-03T16:14:34","modified_gmt":"2020-03-03T13:14:34","slug":"chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti","title":{"rendered":"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/d10d96c9523f873599b9e858dfb50ce7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n5. \u00fanora tohoto roku byl schv\u00e1len nov\u00fd standard pro 10megabitov\u00fd Ethernet. Ano, \u010dtete spr\u00e1vn\u011b: deset megabit\u016f za sekundu.<\/p>\n<p>Pro\u010d je v 21. stolet\u00ed pot\u0159ebn\u00e1 tak \"mal\u00e1\" rychlost? Na to, abychom nahradili ten zoo, kter\u00fd se skr\u00fdv\u00e1 pod hlavn\u00fdm n\u00e1zvem \u201epoln\u00ed sb\u011brnice\u201c \u2014 Profibus, Modbus, CC-Link, CAN, FlexRay, HART atd. Je jich p\u0159\u00edli\u0161 mnoho, nejsou vz\u00e1jemn\u011b kompatibiln\u00ed a relativn\u011b slo\u017eit\u011b se nastavuj\u00ed. A p\u0159itom bychom cht\u011bli jen zapojit kabel do switche a hotovo. Stejn\u011b jako u b\u011b\u017en\u00e9ho Ethernetu.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nA brzy to bude mo\u017en\u00e9! Seznamte se: \u201e802.3cg-2019 \u2014 IEEE Standard for Ethernet \u2014 Amendment 5: Fyzik\u00e1ln\u00ed specifi kace a spr\u00e1va parametr\u016f pro provoz 10 Mb\/s a souvisej\u00edc\u00ed dod\u00e1vku energie po jednom vyv\u00e1\u017een\u00e9m p\u00e1ru vodi\u010d\u016f\u201c. <\/p>\n<p>\u010c\u00edm je tento nov\u00fd Ethernet zaj\u00edmav\u00fd? P\u0159edev\u0161\u00edm \u2013 funguje po jednom zkroucen\u00e9m p\u00e1ru, nikoli po \u010dty\u0159ech. Proto m\u00e1 men\u0161\u00ed konektory a ten\u010d\u00ed kabely. A lze pou\u017e\u00edt ji\u017e polo\u017een\u00fd zkroucen\u00fd p\u00e1r, kter\u00fd jde k senzor\u016fm a ak\u010dn\u00edm \u010dlen\u016fm.<\/p>\n<p>M\u016f\u017eete nam\u00edtat, \u017ee Ethernet funguje do 100 metr\u016f, a senzory jsou um\u00edst\u011bny mnohem d\u00e1l. Opravdu, d\u0159\u00edve to byl probl\u00e9m. Ale 802.3cg funguje a\u017e na vzd\u00e1lenost 1 km! Po jednom p\u00e1ru! Nen\u00ed to \u0161patn\u00e9? <\/p>\n<p>Ve skute\u010dnosti je to je\u0161t\u011b lep\u0161\u00ed: po tomto p\u00e1ru m\u016f\u017ee b\u00fdt dod\u00e1v\u00e1na i elektrick\u00e1 energie. Tak\u017ee t\u00edm za\u010dneme.<\/p>\n<h3>IEEE 802.3bu Power over Data Lines (PoDL)<\/h3>\n<p>\nMysl\u00edm, \u017ee mnoz\u00ed z v\u00e1s sly\u0161eli o PoE (Power over Ethernet) a v\u011bd\u00ed, \u017ee pro p\u0159enos energie jsou pot\u0159eba 2 p\u00e1ry vodi\u010d\u016f. Vstup\/v\u00fdstup energie je realizov\u00e1n v prost\u0159edn\u00edch bodech transform\u00e1tor\u016f ka\u017ed\u00e9ho p\u00e1ru. Pou\u017eit\u00ed jednoho p\u00e1ru nen\u00ed mo\u017en\u00e9. Proto bylo nutn\u00e9 to ud\u011blat jinak. Jak p\u0159esn\u011b, je zn\u00e1zorn\u011bno na obr\u00e1zku n\u00ed\u017ee. Pro p\u0159\u00edklad byl p\u0159id\u00e1n i klasick\u00fd PoE.<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/bb89378da53efb0a9bbf0a9edf583155.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZde:<br \/>\nPSE \u2013 za\u0159\u00edzen\u00ed dod\u00e1vaj\u00edc\u00ed energii (power sourcing equipment)<br \/>\nPD \u2013 za\u0159\u00edzen\u00ed na vzd\u00e1len\u00e9m konci, kter\u00e9 spot\u0159ebov\u00e1v\u00e1 elekt\u0159inu (powered device)<\/p>\n<p>P\u016fvodn\u011b m\u011bl 802.3bu 10 t\u0159\u00edd dod\u00e1vky energie:<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/5d089748498a37f5ae75cc0b8629dc42.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nBarvou jsou zv\u00fdrazn\u011bny t\u0159i podm\u00ednkov\u00e9 stupn\u011b nap\u011bt\u00ed zdroje: 12, 24 a 48V.<\/p>\n<p>Ozna\u010den\u00ed:<br \/>\nVpse \u2014 nap\u011bt\u00ed zdroje nap\u00e1jen\u00ed, V<br \/>\nVpd min \u2014 minim\u00e1ln\u00ed nap\u011bt\u00ed na PD, V<br \/>\nI max \u2014 maxim\u00e1ln\u00ed proud v lince, A<br \/>\nPpd max \u2014 maxim\u00e1ln\u00ed p\u0159\u00edkon PD, W<\/p>\n<p>S p\u0159\u00edchodem protokolu 802.3cg p\u0159ibylo dal\u0161\u00edch 6 t\u0159\u00edd:<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/cb2677254d132ad27c4daf06489795ea.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSamoz\u0159ejm\u011b, p\u0159i takov\u00e9m mno\u017estv\u00ed je PSE a PD mus\u00ed dohodnout t\u0159\u00eddu nap\u00e1jen\u00ed p\u0159ed dod\u00e1n\u00edm pln\u00e9ho nap\u011bt\u00ed. To se prov\u00e1d\u00ed pomoc\u00ed SCCP (Serial Communications Classification Protocol). Je to n\u00edzkorychlostn\u00ed protokol (333 b\/s), zalo\u017een\u00fd na 1-Wire. Funguje pouze tehdy, kdy\u017e nen\u00ed na lince dod\u00e1no hlavn\u00ed nap\u00e1jen\u00ed (v\u010detn\u011b sp\u00e1nkov\u00e9ho re\u017eimu).<\/p>\n<p>Na blokov\u00e9m sch\u00e9matu je zn\u00e1zorn\u011bno, jak se prov\u00e1d\u00ed dod\u00e1vka energie:<\/p>\n<ul>\n<li>je dod\u00e1v\u00e1n proud 10 mA a kontrolov\u00e1na p\u0159\u00edtomnost stabiliz\u00e1toru na 4 V na druh\u00e9m konci<\/li>\n<li>prov\u00e1d\u00ed se dohodnut\u00ed t\u0159\u00eddy nap\u00e1jen\u00ed<\/li>\n<li>je dod\u00e1v\u00e1no hlavn\u00ed nap\u00e1jen\u00ed<\/li>\n<li>pokud spot\u0159eba klesne pod 10 mA \u2013 aktivuje se sp\u00e1nkov\u00fd re\u017eim (dod\u00e1vka pohotovostn\u00edho nap\u00e1jen\u00ed 3,3 V)<\/li>\n<li>pokud spot\u0159eba p\u0159es\u00e1hne 1 mA \u2013 doch\u00e1z\u00ed k v\u00fdstupu ze sp\u00e1nkov\u00e9ho re\u017eimu<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/ac282970ea69804211da01c9c6a384b8.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDohodnut\u00ed t\u0159\u00eddy nap\u00e1jen\u00ed se m\u016f\u017ee vynechat, pokud je to zn\u00e1mo p\u0159edem. Tento re\u017eim se naz\u00fdv\u00e1 Fast Startup Mode. Pou\u017e\u00edv\u00e1 se nap\u0159\u00edklad v automobilech, proto\u017ee tam nen\u00ed pot\u0159eba m\u011bnit konfiguraci p\u0159ipojen\u00e9ho vybaven\u00ed.<\/p>\n<p>Iniciovat p\u0159echod do sp\u00e1nkov\u00e9ho re\u017eimu m\u016f\u017ee jak PSE, tak PD.<\/p>\n<p>Nyn\u00ed p\u0159ejdeme k popisu p\u0159enosu dat. Tam je tak\u00e9 zaj\u00edmav\u00e9: ve standardu jsou definov\u00e1ny dva pracovn\u00ed re\u017eimy \u2013 pro d\u00e1lkov\u00e9 a pro kr\u00e1tk\u00e9 vzd\u00e1lenosti. <\/p>\n<h3>10BASE-T1L<\/h3>\n<p>\nToto je varianta pro velkou vzd\u00e1lenost (long reach). Hlavn\u00ed vlastnosti jsou n\u00e1sleduj\u00edc\u00ed:<\/p>\n<ul>\n<li>dohlednost \u2013 a\u017e 1 km<\/li>\n<li>drah na\u0161ich vodi\u010d\u016f 18 AWG (0.8 mm\u00b2)<\/li>\n<li>a\u017e 10 mezilehl\u00fdch konektor\u016f (a dva koncov\u00e9)<\/li>\n<li>jednopunktov\u00fd re\u017eim<\/li>\n<li>pln\u00fd duplex<\/li>\n<li>symbolov\u00e1 rychlost 7,5 Mbaud<\/li>\n<li>modulace PAM-3, k\u00f3dov\u00e1n\u00ed 4B3T<\/li>\n<li>sign\u00e1l s amplitudou 1 V (1Vpp) nebo 2,4 V<\/li>\n<li>podpora Energy Efficient Ethernet (\"quiet\/refresh\" EEE)<\/li>\n<\/ul>\n<p>\nJe z\u0159ejm\u00e9, \u017ee tato varianta je ur\u010dena pro pr\u016fmyslov\u00e9 aplikace, syst\u00e9my kontroly p\u0159\u00edstupu, automatizaci budov, v\u00fdtah\u016f. Pro \u0159\u00edzen\u00ed chladi\u010d\u016f, klimatizac\u00ed, ventil\u00e1tor\u016f um\u00edst\u011bn\u00fdch na st\u0159ech\u00e1ch. Nebo pro kotle a \u010derpadla um\u00edst\u011bn\u00e1 v technick\u00fdch prostor\u00e1ch. Tedy spousta r\u016fzn\u00fdch aplikac\u00ed, krom\u011b pr\u016fmyslu. Nemluv\u011b o internetu v\u011bc\u00ed (IoT).<\/p>\n<p>Je t\u0159eba zm\u00ednit, \u017ee 10BASE-T1 je pouze jedn\u00edm ze standard\u016f Single Pair Ethernet (SPE). Existuj\u00ed tak\u00e9 100BASE-T1 (802.3bw) a 1000BASE-T1 (802.3bp). Pravda, byly vyvinuty pro automobilov\u00e9 aplikace, proto je tam dosah pouze 15 (UTP) nebo 40 metr\u016f (STP). Nicm\u00e9n\u011b, pl\u00e1ny u\u017e zahrnuj\u00ed i d\u00e1lkov\u00fd 100BASE-T1L. Tak\u017ee v budoucnu p\u0159idaj\u00ed automatick\u00e9 dohodnut\u00ed rychlosti. <\/p>\n<p>Zat\u00edmco schv\u00e1len\u00ed nen\u00ed pou\u017eito, je zde uveden \"rychl\u00fd start\" rozhran\u00ed: m\u00e9n\u011b ne\u017e 100 ms od zapnut\u00ed nap\u00e1jen\u00ed do za\u010d\u00e1tku v\u00fdm\u011bny dat.<\/p>\n<p>Dal\u0161\u00ed volba (nepovinn\u00e1) \u2013 zv\u00fd\u0161en\u00ed amplitudy p\u0159enosu z 1 na 2,4 V pro zlep\u0161en\u00ed pom\u011bru sign\u00e1l\/\u0161um, sn\u00ed\u017een\u00ed po\u010dtu chyb a odol\u00e1n\u00ed pr\u016fmyslov\u00fdm ru\u0161en\u00edm.<\/p>\n<p>A samoz\u0159ejm\u011b EEE. Je to zp\u016fsob, jak \u0161et\u0159it elektrickou energii t\u00edm, \u017ee se vypne vys\u00edla\u010d, kdy\u017e v sou\u010dasnosti nejsou \u017e\u00e1dn\u00e1 data k p\u0159enosu. V diagramu je zn\u00e1zorn\u011bno, jak to vypad\u00e1:<br \/>\n<img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/888029d8582e22cb5c5bb39d5f485aa9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNen\u00ed \u017e\u00e1dn\u00e1 data \u2013 ode\u0161leme zpr\u00e1vu \"odch\u00e1z\u00edm sp\u00e1t\" a vyp\u00edn\u00e1me se. Ob\u010das se probud\u00edme a ode\u0161leme zpr\u00e1vu \"jsem tu je\u0161t\u011b\". Kdy\u017e se objev\u00ed data, druh\u00e9 stran\u011b je zasl\u00e1no upozorn\u011bn\u00ed \"probud\u00edm se\" a za\u010d\u00edn\u00e1 p\u0159enos. To znamen\u00e1, \u017ee neust\u00e1le pracuj\u00ed pouze p\u0159ij\u00edma\u010de.<\/p>\n<p>Nyn\u00ed se pod\u00edvejme, co vymysleli s druhou variantou standardu.<\/p>\n<h3>10BASE-T1S<\/h3>\n<p>\nU\u017e podle posledn\u00edho p\u00edsmene je jasn\u00e9, \u017ee se jedn\u00e1 o protokol pro kr\u00e1tk\u00e9 vzd\u00e1lenosti (short reach). Ale pro\u010d je pot\u0159ebn\u00fd, kdy\u017e na kr\u00e1tk\u00fdch vzd\u00e1lenostech funguje i T1L? P\u0159e\u010dt\u011bme si specifikace:<\/p>\n<ul>\n<li>dosa\u017eitelnost a\u017e 15 m v re\u017eimu point-to-point<\/li>\n<li>duplex nebo half-duplex<\/li>\n<li>vodivost 24-26 AWG (0,2-0,13 mm\u00b2)<\/li>\n<li>symbolov\u00e1 rychlost 12,5 Mbod<\/li>\n<li>DME, k\u00f3dov\u00e1n\u00ed 4B5B<\/li>\n<li>sign\u00e1l s amplitudou 1 V (1 Vpp)<\/li>\n<li>a\u017e 4 mezilehl\u00e9 konektory (a dva koncov\u00e9)<\/li>\n<li>\u017e\u00e1dn\u00e1 podpora EEE<\/li>\n<\/ul>\n<p>\nVypad\u00e1 to jako nic zvl\u00e1\u0161tn\u00edho. Tak pro\u010d je tedy pot\u0159ebn\u00fd? A to je, abychom:<\/p>\n<ul>\n<li>dosa\u017eitelnost a\u017e 25 m v re\u017eimu multipoint (a\u017e 8 uzl\u016f)<\/li>\n<\/ul>\n<p>\nA tohle:<\/p>\n<ul>\n<li>re\u017eim pr\u00e1ce s prevenc\u00ed koliz\u00ed PLCA RS (PHY-Level Collision Avoidance Reconciliation Sublayer)<\/li>\n<\/ul>\n<p>\nA to u\u017e je mnohem zaj\u00edmav\u011bj\u0161\u00ed, \u017ee? Proto\u017ee to v\u00fdrazn\u011b pom\u00e1h\u00e1 sn\u00ed\u017eit mno\u017estv\u00ed vodi\u010d\u016f v \u0159\u00edd\u00edc\u00edch sk\u0159\u00edn\u00edch, stroj\u00edch, robotech, automobilech. A u\u017e existuj\u00ed n\u00e1vrhy vyu\u017e\u00edt ho jako n\u00e1hradu I2C v <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-gdansk\/\"   title=\"serverech\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4502\">serverech<\/a>, switchech a dal\u0161\u00ed elektronice.<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/98614d57cc671efc36bee4d3251f8e60.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAle re\u017eim multipoint m\u00e1 nev\u00fdhody. Hlavn\u00ed z nich je sd\u00edlen\u00e9 m\u00e9dium pro p\u0159enos dat. Samoz\u0159ejm\u011b, kolize se vy\u0159e\u0161\u00ed pomoc\u00ed CSMA\/CD. Ale nen\u00ed zn\u00e1mo, jak\u00e1 bude zpo\u017ed\u011bn\u00ed. A pro n\u011bkter\u00e9 aplikace je to kritick\u00e9. Proto byl v nov\u00e9m standardu multipoint dopln\u011bn o speci\u00e1ln\u00ed re\u017eim PLCA RS (viz dal\u0161\u00ed kapitola).<\/p>\n<p>Druh\u00fd nedostatek je, \u017ee v re\u017eimu multipoint nefunguje PoDL. To znamen\u00e1, \u017ee nap\u00e1jen\u00ed bude t\u0159eba dod\u00e1vat samostatn\u00fdm kabelem nebo ho br\u00e1t n\u011bkde na m\u00edst\u011b. <\/p>\n<p>Nicm\u00e9n\u011b v re\u017eimu point-to-point PoDL funguje i na T1S.<\/p>\n<h3>PLCA RS<\/h3>\n<p>\nTento re\u017eim funguje n\u00e1sledovn\u011b:<\/p>\n<ul>\n<li>uzly si mezi sebou rozd\u011bluj\u00ed identifik\u00e1tory, uzel s ID=0 se st\u00e1v\u00e1 koordin\u00e1torem<\/li>\n<li>koordin\u00e1tor vys\u00edl\u00e1 do s\u00edt\u011b BEACON signal, co\u017e znamen\u00e1 za\u010d\u00e1tek nov\u00e9ho cyklu p\u0159enosu, a p\u0159ed\u00e1v\u00e1 sv\u016fj datov\u00fd bal\u00ed\u010dek<\/li>\n<li>po p\u0159enosu datov\u00e9ho bal\u00ed\u010dku se fronta na p\u0159enos p\u0159esouv\u00e1 na dal\u0161\u00ed uzel<\/li>\n<li>pokud b\u011bhem doby pot\u0159ebn\u00e9 k p\u0159enosu 20 bit\u016f uzel neza\u010dne p\u0159enos, fronta se p\u0159esune na dal\u0161\u00ed uzel<\/li>\n<li>kdy\u017e v\u0161echny uzly p\u0159enesly data (nebo vynechaly svou frontu), koordin\u00e1tor za\u010d\u00edn\u00e1 nov\u00fd cyklus<\/li>\n<\/ul>\n<p>\nCelkov\u011b to p\u0159ipom\u00edn\u00e1 TDMA. Ale s t\u00edm rozd\u00edlem, \u017ee uzel nevyu\u017e\u00edv\u00e1 sv\u016fj \u010dasov\u00fd r\u00e1mec, pokud nem\u00e1 co p\u0159en\u00e1\u0161et. A velikost r\u00e1mce nen\u00ed pevn\u011b stanovena, nebo\u0165 z\u00e1vis\u00ed na velikosti datov\u00e9ho bal\u00ed\u010dku p\u0159en\u00e1\u0161en\u00e9ho uzlem. A to v\u0161e funguje nad standardn\u00edmi r\u00e1mci Ethernet 802.3 (PLCA RS nen\u00ed povinn\u00fd, tak\u017ee mus\u00ed b\u00fdt kompatibilita).<\/p>\n<p>V\u00fdsledek pou\u017eit\u00ed PLCA je na grafech n\u00ed\u017ee. Prvn\u00ed \u2013 zpo\u017ed\u011bn\u00ed v z\u00e1vislosti na zat\u00ed\u017een\u00ed, druh\u00fd \u2013 propustnost v z\u00e1vislosti na po\u010dtu p\u0159en\u00e1\u0161ej\u00edc\u00edch uzl\u016f. Je z\u0159ejm\u00e9, \u017ee zpo\u017ed\u011bn\u00ed se stalo mnohem p\u0159edv\u00eddateln\u011bj\u0161\u00edm. A v nejhor\u0161\u00edm p\u0159\u00edpad\u011b je o 2 \u0159\u00e1dy men\u0161\u00ed ne\u017e v nejhor\u0161\u00edm p\u0159\u00edpad\u011b CSMA\/CD:<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/62bd8e271e7d882095281b37f63d8426.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA propustnost kan\u00e1lu v p\u0159\u00edpad\u011b PLCA je vy\u0161\u0161\u00ed, proto\u017ee se nevyu\u017e\u00edv\u00e1 na \u0159e\u0161en\u00ed koliz\u00ed:<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/b66a9bb8836a6d8d9aa0b21d1136f186.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Konektory<\/h3>\n<p>\nP\u016fvodn\u011b jsme vyb\u00edrali ze 6 variant konektor\u016f, kter\u00e9 nab\u00eddly r\u016fzn\u00e9 firmy. Nakonec jsme se rozhodli pro tyto dva varianty: <\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/0edb52b01e5d082069a10d46a57cd540.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPro b\u011b\u017en\u00e9 provozn\u00ed podm\u00ednky byl vybr\u00e1n konektor LC IEC 63171-1 od spole\u010dnosti CommScope. <\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/a4b8c60e1ffbb0008973a0c5fe1d8dca.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPro n\u00e1ro\u010dn\u00e9 provozn\u00ed podm\u00ednky byla vybr\u00e1na rodina konektor\u016f IEC 63171-6 (d\u0159\u00edve 61076-3-125) od spole\u010dnosti HARTING. Tyto konektory jsou navr\u017eeny pro ochrann\u00e9 stupn\u011b od IP20 do IP67.<\/p>\n<p><img decoding=\"async\" alt=\"\u010ctvrtka Ethernetu: star\u00e1 rychlost, nov\u00e9 mo\u017enosti\" src=\"\/wp-content\/uploads\/2020\/02\/88150dd0f844444ab76d6c3f394658f0.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSamoz\u0159ejm\u011b, konektory a kabely mohou b\u00fdt jak UTP, tak STP. <\/p>\n<h3>Ostatn\u00ed<\/h3>\n<p>\nLze pou\u017eit klasick\u00fd \u010dty\u0159pairov\u00fd Ethernet kabel, p\u0159i\u010dem\u017e ka\u017edou dvojici pou\u017eijete pro samostatn\u00fd kan\u00e1l SPE. Aby nebylo pot\u0159eba tahat kdov\u00edkam \u010dty\u0159i samostatn\u00e9 kabely. Nebo pou\u017e\u00edt jednopairov\u00fd kabel, na konci um\u00edstit p\u0159ep\u00edna\u010d jednopairov\u00e9ho Ethernetu. <\/p>\n<p>Lze tento switch p\u0159ipojit p\u0159\u00edmo do m\u00edstn\u00ed s\u00edt\u011b podniku, pokud je do vzd\u00e1len\u00fdch oblast\u00ed ji\u017e nata\u017eena s\u00ed\u0165 optick\u00fdm vl\u00e1knem? P\u0159ipojit k n\u011bmu senzory a sledovat jejich \u00fadaje zde. P\u0159\u00edmo p\u0159es s\u00ed\u0165. Bez konvertor\u016f a br\u00e1n. <\/p>\n<p>A nemus\u00ed to b\u00fdt nutn\u011b senzory. Mohou to b\u00fdt tak\u00e9 kamerov\u00e9 syst\u00e9my, videotelefony nebo \u201echytr\u00e9\u201c \u017e\u00e1rovky. Pohony r\u016fzn\u00fdch ventil\u016f nebo turnikety na vchodech.<\/p>\n<p>Perspektivy se tedy otev\u00edraj\u00ed zaj\u00edmav\u00e9. Samoz\u0159ejm\u011b, SPE t\u011b\u017eko nahrad\u00ed v\u0161echny pole p\u0159ipojen\u00ed. Ale zna\u010dn\u00fd pod\u00edl z nich si ur\u010dit\u011b vezme. U aut to je jasn\u00e9.<\/p>\n<p><i>PS. Na\u0161el jsem text normy v otev\u0159en\u00e9m p\u0159\u00edstupu. V\u00fd\u0161e uveden\u00e9 informace byly shrom\u00e1\u017ed\u011bny kousky z r\u016fzn\u00fdch prezentac\u00ed a dostupn\u00fdch materi\u00e1l\u016f na internetu. Proto mohou obsahovat nep\u0159esnosti.<\/i><br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/489314\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>5 \u0444\u0435\u0432\u0440\u0430\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0433\u043e\u0434\u0430 \u0431\u044b\u043b \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d \u043d\u043e\u0432\u044b\u0439 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u043d\u0430 10-\u043c\u0435\u0433\u0430\u0431\u0438\u0442\u043d\u044b\u0439 Ethernet. \u0414\u0430, \u0432\u044b \u0432\u0435\u0440\u043d\u043e \u043f\u0440\u043e\u0447\u0438\u0442\u0430\u043b\u0438: \u0434\u0435\u0441\u044f\u0442\u044c \u043c\u0435\u0433\u0430\u0431\u0438\u0442 \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0443. \u0414\u043b\u044f \u0447\u0435\u0433\u043e \u0432 21-\u043c \u0432\u0435\u043a\u0435 \u043d\u0443\u0436\u043d\u0430 \u0442\u0430\u043a\u0430\u044f \u00ab\u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0430\u044f\u00bb \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c? \u0414\u043b\u044f \u0437\u0430\u043c\u0435\u043d\u044b \u0442\u043e\u0433\u043e \u0437\u043e\u043e\u043f\u0430\u0440\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043a\u0440\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u0451\u043c\u043a\u0438\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c \u00ab\u043f\u043e\u043b\u0435\u0432\u0430\u044f \u0448\u0438\u043d\u0430\u00bb \u2014 Profibus, Modbus, CC-Link, CAN, FlexRay, HART \u0438 \u0442.\u0434. \u0418\u0445 \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u043c\u043d\u043e\u0433\u043e, \u043e\u043d\u0438 \u043d\u0435\u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":71070,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-71069","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"5 \u0444\u0435\u0432\u0440\u0430\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0433\u043e\u0434\u0430 \u0431\u044b\u043b.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/chetvertushka-ethernet-a-staraya-skorost-novye-vozmozhnosti\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO 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