Mhedziso yeSimba Pamusoro peMagetsi (POE)
POE (Simba Pamusoro peEthernet) inoreva mamwe ma-IP-based terminals (akadai seIP phones, wireless LAN access points AP, network cameras, etc.) pasina kuchinja huripo Ethernet Cat.5 wiring infrastructure.Ichiri kutumira masaini edatha, inopa DC magetsi emagetsi tekinoroji yemidziyo yakadaro.Tekinoroji yePOE inogona kuve nechokwadi chekushanda kwakajairwa kwetiweki iripo uku uchiona kuchengetedzeka kweiyo iripo yakarongeka cabling, uye kuderedza mutengo.
POE inozivikanwawo sesimba rekupa simba rakavakirwa panharaunda nharaunda network (POL, Simba pamusoro peLAN) kana Active Ethernet (Active Ethernet), dzimwe nguva inonziwo Simba pamusoro peEthernet kwenguva pfupi.Uku kushandisa tambo dziripo dzeEthernet tambo dzekutumira data uye data panguva imwe chete.Iwo azvino zviyero uye zvirevo zvesimba remagetsi, uye chengetedza kuenderana nearipo Ethernet masisitimu nevashandisi.Iyo IEEE 802.3af chiyero chiyero chitsva chakavakirwa paPOE yePower-over-Ethernet system.Iyo inowedzera yakabatana zviyero zveyakananga magetsi magetsi kuburikidza netiweki tambo pahwaro hweIEEE 802.3.Iyo yekuwedzera yeiyo iripo Ethernet chiyero uye yekutanga chiyero chepasi rose chekugovera magetsi.standard.
IEEE yakatanga kuvandudza mwero muna 1999, uye vatengesi vekutanga kutora chikamu vaive 3Com, Intel, PowerDsine, Nortel, Mitel, uye National Semiconductor.Nekudaro, kushomeka kweiyo chiyero kwave kumisa kuwedzera kwemusika.Kusvika muna Chikumi 2003, IEEE yakabvumidza iyo 802.3af chiyero, iyo yakanyatsojekesa magetsi ekuona uye kutonga nyaya mumasisitimu ari kure, uye akabatana ma routers, switch, uye hubs kune IP mafoni, chengetedzo masisitimu, uye isina waya yenzvimbo network network kuburikidza neEthernet tambo.Gadzirisa maitiro ekupa magetsi emidziyo yakadai semapoinzi.Kuvandudzwa kweIEEE 802.3af kunosanganisira kuedza kwenyanzvi dzakawanda dzekambani, izvo zvinobvumirawo mwero kuti uedzwe zvizere.
POE system kuumbwa uye simba rekupa hunhu paramita
Iyo POE sisitimu inosanganisira magetsi ekupa magetsi (PSE, Power Sourcing Equipment) uye magetsi ekugamuchira michina (PD, Power Chishandiso) zvikamu.Mudziyo wePSE ndiwo mudziyo unopa simba kumidziyo miviri yevatengi, uye zvakare mudziyo unopa simba kuPOE yese.Iyo PD mudziyo ndiyo PSE inogamuchira simba, kureva, mutengi mudziyo wePOE system, senge IP mafoni, network kuchengetedza, APs, uye PDAs.) Kana zvimwe zvigadzirwa zvakawanda zvakadai senharembozha uye makomputa (zvidiki, chero mudziyo une simba rinopfuura 13W unogona kuwana simba rinoenderana kubva kuRJ45 interface).Izvo hazvivimbe neIEEE 802.3af chiyero kuti igadzirise ruzivo rwekubatanidza nezve mamiriro ekubatanidza, rudzi rwechishandiso, uye nhanho yekugamuchira yekupedzisira mudziyo PD, uye panguva imwechete inopa simba kuPD zvinoenderana nePSE.
Iwo makuru emagetsi ekupa hunhu maparamita ePOE akajairwa magetsi emagetsi system ndeaya:
◆ Mhepo iri pakati pe44V ne57V, ine kukosha kwe48V.
◆Iyo yakawanda inobvumirwa ikozvino 550mA, uye iyo yepamusoro yekutanga ikozvino 500mA.
◆Avhareji yekushanda ikozvino 10～350mA, uye yakawandisa ikozvino 350～500mA.
◆ Pasi pemamiriro asina mutoro, iyo yakanyanya kudiwa ikozvino 5mA.
◆Ipa zvikumbiro zvishanu zvemagetsi emagetsi ekukumbira kubva ku3.84 kusvika ku12.95W yePD midziyo, nehuwandu husingapfuuri 13W.
Maitiro ekushanda kwePOE magetsi ekupa
Kana ichiyangarara PSE magetsi emagetsi emagetsi munetiweki, maitiro ekushanda ePOE magetsi anotevera.
◆Kuona: Pakutanga, iyo voltage inobuda nePSE device pachiteshi kusvikira yaona kuti data terminal connection isimba rekugamuchira simba rinotsigira IEEE 802.3af standard.
◆ PD device classification: Mushure mekuona simba rekugamuchira PD PD, PSE device inogona kuisa PD device uye kuongorora kushandiswa kwesimba kunodiwa nePD device.
◆Tanga magetsi: Panguva inogadziriswa (kazhinji isingasviki 15μs) kuti utange magetsi, PSE device inotanga kupa simba kune PD device kubva kune yakaderera kusvika ichipa 48V magetsi.
◆Simba rekushandisa: Ipa yakagadzikana uye yakavimbika 48V dynamic over-voltage yePD midziyo yekusangana nemagetsi overtime yePD michina isingapfuuri 15.4W.
◆Simba kudzima: Kana PD device yakabviswa kubva kune network, PSE ichakurumidza (kazhinji mukati me30-400ms) inomira simba rePD device, uye dzokorora nzira yekuona kuti data data yakabatana nePD device.
Kana uchibatanidza chero mudziyo wetiweki kuPSE, iyo PSE inofanira kutanga yaona kuti mudziyo hausi PD kuti ive nechokwadi chekuti haupi zvazvino kune zvishandiso zvisingaenderane nePOE standard, izvo zvinogona kukuvadza.Inogona kuoneka nekutsvaga diki voltage yemagetsi ikozvino kutarisa kana chinhambwe chine maitiro anoenderana nezvinodiwa.Chete kana kuwonekwa kwasvika ndipo panogona kupihwa iyo yakazara 48V voltage, iripo ichiripo, uye yakanyanya kupfupika terminal michina inogona kunge iine chikanganiso..Seyakawedzerwa PD yemaitiro ekutsvaga, inogona zvakare kurongedza nzira dzekupa magetsi dzinoda iyo PSE, uye kupa iyo PSE kupa simba nenzira inoshanda.Iyo PSE inotanga kupa simba.Icharamba ichitarisa iyo PD yekupinda ikozvino.Kana iyo PD ikozvino kushandiswa inodonha pasi peiyo shoma kukosha, senge kana mudziyo ukadzimwa kana kusangana nekunyanyisa kushandiswa kwesimba kwePD mudziyo, pfupi pfupi, kana simba rekupa simba rinopfuura PSE, iyo PSE ichaparadza magetsi uye kutanga kuona. process zvakare.
Chigadzirwa chemagetsi chinogona kupihwawo kugona kwehurongwa, semuenzaniso, kushandiswa kweiyo nyore network protocol (SNMP).Iro basa rinogona kupa mabasa akadai sekudzoreredza kudzoreredza uye kudzoreredza kudzoreredza manejimendi.
Zvinokwanisika kudzidza nzira yekufambisa yePOE.Pane zvinhu zviviri zvakakosha zvekufunga nezvazvo mukupa, kunova kuzivikanwa kwemidziyo yePD, uye imwe yacho kugona kweUPS muhurongwa.