1. PoE maʻamau a me PoE maʻamau

No ka PoE maʻamau e pili ana i nā kūlana IEEE 802.3af/at/bt a loaʻa iā ia kahi protocol laʻa lima. ʻAʻole i loaʻa i ka PoE maʻamau kahi protocol lulu lima, a hāʻawi iā 12V, 24V a i ʻole 48V DC mana lako.

ʻO ka poʻe hoʻololi mana PoE maʻamau he pahu mana PoE i loko, aia kahi hana ʻike ma mua o ka lako mana. Ke hoʻopiliʻia ka mea hana, e hoʻouna ka mana o PoE i kahi hōʻailona i ka pūnaewele eʻike ai inā he mea PD ka pahu ma ka pūnaewele e kākoʻo ana i ka lako mana PoE. ʻO ka huahana PoE maʻamau ʻaʻole he mea hoʻolako uila uwea hoʻolako ikaika, nāna e hoʻolako i ka mana i ka wā e hoʻohana ʻia ai. ʻAʻohe ʻanuʻu ʻike, a hāʻawi ia i ka mana me ka manaʻo ʻole inā he mea mana PoE ka pahu, a he maʻalahi loa ke puhi ʻana i ka mea komo.

2. Nā ʻano ʻike maʻamau o nā hoʻololi PoE maʻamau

No laila pehea e ʻike ai i nā hoʻololi PoE maʻamau ʻole? Hiki ke ho'āʻo ʻia kēia mau ʻano hana.

a. E nānā i ka voltage

ʻO ka mea mua, e noʻonoʻo pono mai ka voltage lako. ʻO ka IEEE 802.3 af/at/bt protocol e kuhikuhi ana i ka laulā PoE port output voltage ma waena o 44-57V. ʻO nā volt supply mana maʻamau a pau ma mua o 48V he mau huahana maʻamau ʻole, e like me nā huahana lako mana 12V a me 24V maʻamau. Eia nō naʻe, ʻaʻole paha he huahana PoE maʻamau ka lako mana 48V, no laila pono ke ana ʻana i ka volta e like me ka multimeter e ʻike ai.

b. E ana me ka multimeter

E hoʻomaka i ka hāmeʻa, e hoʻoponopono i ka multimeter i ke kūlana ana ʻana o ka uila, a hoʻopā i nā pine lako mana o ka mea PSE me nā peni ʻelua o ka multimeter (maʻa mau 1/2, 3/6 a i ʻole 4/5, 7/8 o ka RJ45. port ), inā e ana ʻia kahi mea hana me ka hoʻopuka paʻa o 48V a i ʻole nā ​​​​waiwai uila ʻē aʻe (12V, 24V, etc.), he huahana maʻamau ʻole ia. No ka mea ma kēia kaʻina hana, ʻaʻole ʻike ʻo PSE i nā mea hana mana (eia kahi multimeter), a hoʻohana pololei i ka 48V a i ʻole nā ​​​​waiwai uila ʻē aʻe no ka lako mana.

ʻO ka mea ʻē aʻe, inā ʻaʻole hiki ke ana ʻia ka uila a lele ka nila o ka multimeter ma waena o 2 a me 18V, ʻo ia ka PoE maʻamau. No ka mea, i kēia manawa, ke hoʻāʻo nei ka PSE i ka pahu PD (eia kahi multimeter), a ʻaʻole PD kānāwai ka multimeter, ʻaʻole e hāʻawi ka PSE i ka mana, ʻaʻole e hoʻokumu ʻia ka uila paʻa.

c. Me ke kōkua o nā mea hana e like me PoE detectors

I mea e maʻalahi ai ka hoʻonohonoho ʻana i ka papahana a me nā limahana hoʻokele e ʻike koke a ʻike i nā laina pūnaewele PoE, e hoʻoholo inā loaʻa i ka hōʻailona pūnaewele ka mana PoE, inā paha e hana maʻamau ʻo PoE, a inā paha he PoE maʻamau a i ʻole ka huahana PoE maʻamau, Utop. ua hoʻomohala i kahi mea ʻike PoE.

Kākoʻo kēia huahana i ka ʻike waena waena (4/5 7/8) a me ka ʻike hope-span (1/2 3/6), kākoʻo iā IEEE802.3 af/at PoE maʻamau a me ka PoE maʻamau ʻole; Hoʻopili PoE a i ʻole kelepona. E hoʻopili wale i ka mea ʻike PoE i ka pūnaewele hoʻoikaika, a ʻo ka LED aia ma ka mea ʻike PoE e kukui a ʻalohi paha. 'O ke kukui 'o ia ho'i ka PoE ma'amau, 'o ia ho'i ke kukui pa'a 'ole PoE ma'amau. Hiki i kahi mea hana ʻike liʻiliʻi ke hāʻawi i ka maʻalahi no ka hana ʻenehana.