Incamake yimbaraga hejuru yamashanyarazi (POE)
POE (Imbaraga Zirenga Ethernet) bivuga ama terefone ashingiye kuri IP (nka terefone ya IP, imiyoboro ya LAN itagendanwa AP, kamera y'urusobe, nibindi) idahinduye ibikorwaremezo bya Ethernet Cat.5. Mugihe cyohereza ibimenyetso byamakuru, bitanga tekinoroji ya DC itanga ibikoresho nkibi. Ikoranabuhanga rya POE rirashobora gukora imikorere isanzwe y'urusobe rusanzwe mugihe umutekano wumutekano uriho, kandi ukagabanya ibiciro.
POE izwi kandi nka sisitemu yo gutanga amashanyarazi ashingiye kumurongo waho (POL, Power over LAN) cyangwa Ethernet Active (Active Ethernet), rimwe na rimwe nanone yitwa Power over Ethernet mugihe gito. Uku nugukoresha insinga zisanzwe za Ethernet zohereza kugirango wohereze amakuru hamwe namakuru icyarimwe. Ibipimo bigezweho nibisobanuro byingufu zamashanyarazi, kandi bigumane guhuza na sisitemu ya Ethernet hamwe nabakoresha. IEEE 802.3af isanzwe ni igipimo gishya gishingiye kuri POE ya sisitemu ya Power-over-Ethernet. Yongeraho ibipimo bifitanye isano no gutanga amashanyarazi ataziguye binyuze mumurongo wa neti hashingiwe kuri IEEE 802.3. Nukwagura ibipimo bisanzwe bya Ethernet nibisanzwe mpuzamahanga mpuzamahanga byo gukwirakwiza ingufu. bisanzwe.
IEEE yatangiye guteza imbere ibipimo mu 1999, kandi abacuruzi ba mbere bitabiriye ni 3Com, Intel, PowerDsine, Nortel, Mitel, na Semiconductor yigihugu. Nyamara, ibitagenda neza muriki gipimo byagiye bigabanya kwagura isoko. Kugeza muri Kamena 2003, IEEE yemeje 802.3af igipimo, cyerekanaga neza ibibazo byo kumenya amashanyarazi no kugenzura muri sisitemu ya kure, kandi bihujweRouters. Shyira muburyo bwo gutanga amashanyarazi nkibikoresho. Iterambere rya IEEE 802.3af ririmo imbaraga zinzobere nyinshi zamasosiyete, nazo zituma ibipimo bipimwa byuzuye.
POE sisitemu igizwe nibitanga amashanyarazi biranga ibipimo
Sisitemu ya POE ikubiyemo ibikoresho bitanga amashanyarazi (PSE, ibikoresho byo gutanga amashanyarazi) hamwe nibikoresho byakira amashanyarazi (PD, ibikoresho byamashanyarazi). Igikoresho cya PSE nigikoresho gitanga ingufu kubikoresho byombi byabakiriya, kandi nigikoresho gitanga ingufu kuri POE yose. Igikoresho cya PD ni PSE yemera imbaraga, ni ukuvuga igikoresho cyabakiriya ba sisitemu ya POE, nka terefone ya IP, umutekano wurusobe, APs, na PDAs. ) Cyangwa ibindi bikoresho byinshi nka terefone igendanwa na mudasobwa (ntoya, igikoresho icyo aricyo cyose gifite ingufu zirenga 13W gishobora kubona imbaraga zijyanye na interineti ya RJ45). Ntabwo yishingikiriza kuri IEEE 802.3af kugirango ashyireho amakuru ahuza imiterere ihuza, ubwoko bwibikoresho, nurwego rwibikoresho byakira PD, kandi icyarimwe bitanga imbaraga kuri PD ukurikije PSE.
Amashanyarazi nyamukuru atanga ibimenyetso biranga POE isanzwe itanga amashanyarazi ni:
Umuvuduko uri hagati ya 44V na 57V, hamwe nagaciro gasanzwe ka 48V.
Current Ikigereranyo ntarengwa cyemewe ni 550mA, naho intangiriro ntarengwa ni 500mA.
Impuzandengo y'akazi ikora ni 10 ～ 350mA, naho imizigo irenze ni 350 ～ 500mA.
◆ Mugihe kitarimo umutwaro, ibyangombwa bisabwa ni 5mA.
Tanga inzego eshanu zamashanyarazi zisabwa kuva 3.84 kugeza 12.95W kubikoresho bya PD, hamwe nibirenga 13W.
Inzira yo gukora yo gutanga amashanyarazi POE
Iyo ureremba ibikoresho bya PSE bitanga ibikoresho byumuyoboro, inzira yo gukora amashanyarazi ya POE nuburyo bukurikira.
Kumenya: Mugitangira, voltage isohoka nigikoresho cya PSE ku cyambu kugeza igihe iboneye ko guhuza amakuru ari igikoresho cyakira amashanyarazi gishyigikira IEEE 802.3af.
Classification Ibyiciro bya PD byashyizwe mubikorwa: Nyuma yo kumenya igikoresho cyakira ingufu PD, igikoresho cya PSE gishobora gutondekanya igikoresho cya PD no gusuzuma imikoreshereze yingufu zisabwa nigikoresho cya PD.
◆ Tangira gutanga amashanyarazi: Mugihe cyagenwe (muri rusange kiri munsi ya 15μs) kugirango utangire amashanyarazi, igikoresho cya PSE gitangira gutanga amashanyarazi kubikoresho bya PD bivuye mumashanyarazi make kugeza bitanga amashanyarazi 48V.
Supply Amashanyarazi: Tanga 48V itajegajega kandi yizewe ifite imbaraga zirenga voltage kubikoresho bya PD kugirango ihuze amasaha yikirenga yibikoresho bya PD bitarenze 15.4W.
◆ Kuzimya: Niba igikoresho cya PD cyaciwe numuyoboro, PSE izahita (mubisanzwe muri 30-400m) ihagarike ingufu za PD, hanyuma isubiremo uburyo bwo gutahura kugirango umenye niba itumanaho ryamakuru rihujwe nigikoresho cya PD.
Iyo uhuza igikoresho icyo aricyo cyose cyurusobe na PSE, PSE igomba kubanza kumenya ko igikoresho atari PD kugirango irebe ko idatanga amashanyarazi kubikoresho bitujuje ubuziranenge bwa POE, bishobora guteza ibyangiritse. Irashobora kugerwaho mugushakisha voltage ntoya yumuriro wamashanyarazi kugirango urebe niba intera ifite ibiranga byujuje ibisabwa. Gusa iyo gushishoza kugerwaho birashobora gutangwa voltage yuzuye ya 48V, ikiriho iracyahari, kandi ibikoresho bigufi cyane birashobora kuba bifite amakosa. . Nka PD yaguye yuburyo bwo kuvumbura, irashobora kandi gutondekanya uburyo bwo gutanga amashanyarazi busaba PSE, kandi bugatanga PSE gutanga amashanyarazi muburyo bunoze. PSE itangira gutanga imbaraga. Bizakomeza gukurikirana PD yinjiza. Iyo imikoreshereze ya PD igabanutse munsi yagaciro ntarengwa, nkigihe igikoresho kidacometse cyangwa gihuye nikoreshwa ryinshi ryamashanyarazi ya PD, umuzunguruko mugufi, cyangwa umutwaro w'amashanyarazi urenze PSE, PSE izasenya amashanyarazi hanyuma itangire kubimenya. byongeye.
Igikoresho cyo gutanga amashanyarazi gishobora kandi gutangwa hamwe nubushobozi bwa sisitemu, kurugero, ikoreshwa rya protocole yoroshye (SNMP). Imikorere irashobora gutanga imirimo nko kugarura no kugarura imiyoborere.
Birashoboka kwiga uburyo bwo kohereza POE. Hano haribibazo bibiri byingenzi ugomba gusuzuma mugutanga, aribyo kumenyekanisha ibikoresho bya PD, ikindi nubushobozi bwa UPS muri sisitemu.