{"id":139,"date":"2024-05-22T08:36:46","date_gmt":"2024-05-22T06:36:46","guid":{"rendered":"https:\/\/eurocabos.solbyte.dev\/blog\/poes-verda\/"},"modified":"2024-06-12T07:41:20","modified_gmt":"2024-06-12T05:41:20","slug":"poes-verda","status":"publish","type":"post","link":"https:\/\/www.eurocabos.es\/blog\/poes-verda\/","title":{"rendered":"Power Over Ethernet, comunicar alimentando"},"content":{"rendered":"<p>En <strong>Eurocabos Sur<\/strong> solemos tener disponibles, aparte de switches\u00a0con puertos para telealimentar los dispositivos remotos, inyectores.<\/p>\n<p>Se conectan a LAN y electricidad, dando la salida combinada en el RJ45 de salida, PoE:<\/p>\n<p><em>Voltaje 48V:<\/em><br \/>\n<a href=\"https:\/\/www.eurocabos.es\/ubiquiti-electronica-de-red\/5718-inyector-poe-48v-063a-u-poe-at-30w-giga-u-poe-at.html\" target=\"_blank\" rel=\"noopener\">731POEATEU INYECTOR POE+ 48V 0,63A U-POE-AT 30W GIGA<\/a><br \/>\n<a href=\"https:\/\/www.eurocabos.es\/ubiquiti-electronica-de-red\/1577-inyector-poe-48v-05a-giga-ubn-poe-48-24w-g.html\" target=\"_blank\" rel=\"noopener\">731UPOE48G INYECTOR POE 48V 0,5A GIGA UBN-POE-48-24W-G<\/a><br \/>\n<a href=\"https:\/\/www.eurocabos.es\/ubiquiti-electronica-de-red\/5717-inyector-poe-48v-032a-u-poe-af-eu-153w-ub.html\" target=\"_blank\" rel=\"noopener\">731POEAFEU INYECTOR POE 48V 0,32A U-POE-af-EU 15,3W UB<\/a><\/p>\n<p><em>Voltaje variable. Hasta 48V:<\/em><br \/>\n<a href=\"https:\/\/www.eurocabos.es\/tp-link-electronica-de-red\/1579-inyector-poe-tl-poe-150s.html\" target=\"_blank\" rel=\"noopener\">732TLPOE0S INYECTOR POE TL-POE 150S<\/a><\/p>\n<p><em>Voltaje 24V:<\/em><\/p>\n<p><a href=\"https:\/\/www.eurocabos.es\/ubiquiti-electronica-de-red\/3026-inyector-poe-24v-05a-12-w-giga-ubiquiti-24-12w-g.html\" target=\"_blank\" rel=\"noopener\">731NPOE24G INYECTOR POE 24V 0.5A 12 W GIGA UBIQUITI 24-12W-G<\/a><br \/>\n<a href=\"https:\/\/www.eurocabos.es\/ubiquiti-electronica-de-red\/3027-inyector-poe-24v-1a-poe-24-24w-geu.html\" target=\"_blank\" rel=\"noopener\">731BNPOE24 INYECTOR POE 24V 1A POE-24-24W-G(EU)<\/a><\/p>\n<p>Para suministrar alimentaci\u00f3n en el mismo cable de datos, se defini\u00f3 en el est\u00e1ndar de Ethernet <strong>802.3af<\/strong>, denominado\u00a0<strong>Power over Ethernet<\/strong>, cuyo establecimiento de la conexi\u00f3n\u00a0lleva los siguientes pasos:<\/p>\n<p>Detecci\u00f3n &#8211; Pulso de 2,7 a 10 voltios para medir una resistencia aceptable, entre 15 y 33 ohmios.<\/p>\n<p>Clasificaci\u00f3n \u0096 Voltaje de 14,5 a 20,5 para conocer el consumo del equipo (4W, 7W \u00f3 15.4W)<\/p>\n<p>Arranque \u0096 El equipo alimentado arrancar\u00e1 cuando el voltaje supere los 42 V.<\/p>\n<p>Operativo \u0096 Alimentaci\u00f3n del dispositivo entre 36-57 V.<\/p>\n<p>Con este protocolo se alimentaron tel\u00e9fonos IP, puntos de acceso WIFI y c\u00e1maras IP, pero fue necesario definir otro modelo con mayor potencia de alimentaci\u00f3n,<strong>\u00a0802.3at<\/strong>\u00a0pensando en aquellas c\u00e1maras llamadas PTZ, pan-tilt-zoom (las dos primeras: rotaci\u00f3n e inclinaci\u00f3n; la tercera, aumento), con motorizaci\u00f3n y mayor consumo.<\/p>\n<p>As\u00ed se empez\u00f3 a hablar de\u00a0<strong>PoE y PoE+. <\/strong>Ambos emplean dos pares para transportar la alimentaci\u00f3n:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eurocabos.solbyte.dev\/blog\/wp-content\/uploads\/2024\/06\/Poe-y-Poe.png\" alt=\"poe y poe+\" width=\"522\" height=\"512\" \/><\/p>\n<p>Actualmente hay otros dos tipos, emplean los 4 pares para alimentar, por lo que se les conoce como 4pPoE, o PoE++. Se trata de los tipos 3 (60W) y 4 (90W), definidos en el est\u00e1ndar IEEE 802.3bt (2018): Controles de acceso, Pantallas OLED, Carga de port\u00e1tiles, Televisiones IP, Quioscos de informaci\u00f3n\u0085<\/p>\n<p>Estas potencias en cableado estructurado tienen una consecuencia: el <strong>impacto t\u00e9rmico<\/strong>.<\/p>\n<p>Ya no solo son impensables cables de conductores cobreados; sino que, para mantener el rendimiento para el canal de 100 m, que fue definido para una temperatura ambiente de 20?C. Resulta que la atenuaci\u00f3n es mayor conforme aumenta la temperatura, y si PoE crea calor, 4PPoE podr\u00eda doblar el nivel de calor producido.<\/p>\n<p>Se recomienda no hacer mazos de m\u00e1s de 24 cables y dejar espacio entre ellos de al menos 15mm. Otros factores que pal\u00edan este efecto son el grosor del conductor (CAT6A y CAT7, mejor que las inferiores) y di\u00e1metro exterior del cable (apantallados, mejor que UTP).<\/p>\n<p>En esta tabla se observa la reducci\u00f3n de la distancia de canal, debido al calentamiento global, como todo en nuestro tiempo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eurocabos.solbyte.dev\/blog\/wp-content\/uploads\/2024\/06\/at-vs-temp.png\" alt=\"atenuaci\u00f3n con temperatura\" width=\"234\" height=\"256\" \/><\/p>\n<p>Los resultados de laboratorio, con distintos tipos de cable en mazos de 37 cables, nos indican que debe haber aireaci\u00f3n entre mazos. V\u00e9ase la diferencia de temperatura para cada uno de los tres tipos de cable estudiados, con y sin ventilaci\u00f3n.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eurocabos.solbyte.dev\/blog\/wp-content\/uploads\/2024\/06\/calor-con-intensidad.png\" alt=\"calor con intensidad\" width=\"698\" height=\"487\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Power Over Ethernet, comunicar alimentando<\/p>\n","protected":false},"author":1,"featured_media":378,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Power Over Ethernet, comunicar alimentando - Eurocabos<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eurocabos.solbyte.dev\/blog\/poes-verda\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Power Over Ethernet, comunicar alimentando - 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