Umgama wothumelo olukhuselekileyo lonikezelo lwamandla e-POE li-100 leemitha, kwaye kuyacetyiswa ukuba usebenzise intambo yenethiwekhi yobhedu yeCat 5e. Kuyenzeka ukuba usasaze amandla eDC ngentambo eqhelekileyo ye-Ethernet kumgama omde, kutheni ke umgama wothumelo ukhawulelwe kwiimitha ezili-100? Okulandelayo, siya kulandela i-JHA TECH ukufunda ngakumbi malunga nomgama okhuselekileyo wothumelo lobonelelo lwamandla lwe-POE.

Inyani kukuba umgama ogqithisiweyo wokuhanjiswa kwe-POE uxhomekeke ikakhulu kumgama wokuhanjiswa kwedatha. Xa umgama wothumelo udlula iimitha ezili-100, ukulibaziseka kwedatha kunye nokulahleka kwepakethi kunokwenzeka. Ngoko ke, umgama wothumelo akufanele udlule iimitha ezili-100 kwinkqubo yokwakhiwa kwangempela.

Nangona kunjalo, sele kukho ezinye iiswitshi ze-POE ezinomgama wokuhambisa ukuya kuthi ga kwi-250 yeemitha, ezinokwanelisa unikezelo lwamandla omde. Kukwakholelwa ukuba ngophuhliso lwetekhnoloji yobonelelo lwamandla e-POE kungekudala, umgama wothumelo uya kwandiswa kude.

Umgangatho we-POE IEEE 802.3af ufuna ukuba amandla okukhutshwa kwe-port ye-PSE ye-port yi-15.4W okanye i-15.5W, kwaye amandla afunyenweyo kwisixhobo sePD emva kweemitha ezili-100 zothumelo kufuneka angabi ngaphantsi kwe-12.95W. Ngokutsho kwe-802.3af ixabiso eliqhelekileyo langoku le-350ma, ukuchasana kwe-cable ye-network network ye-100-meter kufuneka ibe yi (15.4-12.95W) / 350ma = 7 ohms okanye (15.5-12.95) / 350ma = 7.29 ohms.

Intambo yenethiwekhi eqhelekileyo ngokwendalo iyahlangabezana nale mfuneko. Umgangatho we-IEEE 802.3af POE wonikezelo lwamandla ngokwawo ulinganiswa ngentambo yenethiwekhi eqhelekileyo. Esona sizathu kuphela sengxaki yeemfuno zentambo zombane zePOE kukuba iintambo ezininzi zothungelwano emarikeni ziintambo zomnatha ezingezizo ezisemgangathweni kwaye aziveliswanga ngokungqinelana neemfuno zeentambo zomnatha eziqhelekileyo. Izixhobo ze-cable network non-standard network kwi-marketry ziquka i-copper-clad steel, i-aluminium ye-copper-clad, i-copper-clad iron, njl. Ezi ntambo zinemilinganiselo emikhulu yokumelana kwaye ayifanelekanga ukunikezelwa kwamandla e-POE. Umbane we-POE kufuneka usebenzise intambo yenethiwekhi eyenziwe nge-oxygen-free copper, oko kukuthi, intambo yenethiwekhi eqhelekileyo.

Itekhnoloji yokubonelela ngombane ye-POE ineemfuno eziphezulu zeengcingo. Kucetyiswa ukuba ekubekeni iliso kwiiprojekthi, akufanele ulondoloze iindleko kwiingcingo.