PoE Power Supply Standards

PoE (Power dua Ethernet) yog hais txog "Ethernet fais fab mov," ib qho cuab yeej siv hluav taws xob xa hluav taws xob rau cov khoom siv hauv network ntawm Ethernet cables. Nws tso cai rau kev sib kis ntawm ob qho tib si hluav taws xob hluav taws xob thiab cov ntaub ntawv teeb liab, tshem tawm qhov xav tau ntawm cov hluav taws xob sib cais rau cov khoom siv. PoE muaj txiaj ntsig zoo muab cov khoom siv hluav taws xob hauv nruab nrab rau cov khoom siv xws li IP xov tooj, wireless APs, portable device chargers, daim npav nyeem ntawv, koob yees duab, thiab cov ntaub ntawv tau txais. Nws muaj qhov zoo ntawm kev ntseeg siab, kev sib txuas yooj yim, thiab cov qauv kev sib raug zoo.

Raws li seb PoE cov cuab yeej ua tau raws li peb tus qauv PoE uas tau muab los ntawm IEEE Standards Committee, PoE cov cuab yeej tuaj yeem muab faib ua tus qauv PoE thiab tsis yog - qauv PoE.

Standard PoE: Hais txog PoE cov khoom siv uas ua raws li peb tus qauv PoE uas tau muab los ntawm IEEE Standards Committee (IEEE 802.3af standard, IEEE 802.3at standard, thiab IEEE 802.3bt standard).

Tsis yog - qauv PoE: Hais txog PoE cov khoom siv uas tsis ua raws li peb tus qauv PoE uas tau muab los ntawm IEEE Standards Committee. Cov no suav hais tias tsis yog - cov khoom siv PoE txheem.

PoE Power Supply Standards thiab Technical Parameters

Kev Siv Hluav Taws Xob Technology	PoE	PoE +	PoE++	PoE+++
Power Supply Standard	IEEE 802.3 ua	IEEE 802.3 ua	IEEE 802.3 ib	IEEE 802.3 ib
Fais fab mov nrug	100m	100m	100m	100m
Kev faib tawm	0~3	0~4	0~6	0~8
Qhov siab tshaj tam sim no	350 mA	600 mA	1200 mA	17 30 mA
PSE tso zis voltage	44V DC ~ 57V DC	50V DC ~ 57V DC	50V DC ~ 57V DC	52V DC ~ 57V DC
PSE Maximum Output Power	Tsawg dua lossis sib npaug li 15.4W	Tsawg dua lossis sib npaug li 30W	Tsawg dua lossis sib npaug li 60W	Tsawg dua lossis sib npaug li 90W
PD input voltage	36V DC ~ 57V DC	42.5V DC ~ 57V DC	42.5V DC ~ 57V DC	42.5V DC ~ 57V DC
PD Lub zog siab tshaj plaws	12.95W	25.5W	51W	71.3W
Qhov siab tshaj plaws kis kab poob	2.45W	4.5W	9W	18.7W
Cov Kev Cai Cable	Tsis muaj kev cai tshwj xeeb	CAT-5e lossis siab dua network cable	CAT-5e lossis siab dua network cable	CAT-5e lossis siab dua network cable
Fais fab Cable Pairs	2	2	4	4

Cov Cheebtsam ntawm PoE Power Supply System

PoE Power Supply: PoE fais fab mov muab lub zog rau tag nrho PoE system. Tus naj npawb ntawm PDs txuas nrog PSE yog txwv los ntawm lub zog muaj peev xwm ntawm PoE fais fab mov. Raws li seb nws puas yog pluggable, PoE cov khoom siv hluav taws xob tau muab faib ua ob hom: ua tau -hauv thiab sab nraud.
Cov Khoom Siv Hluav Taws Xob (PSE): Qhov no yog hais txog PoE cov khoom siv uas muab lub zog rau PDs ntawm Ethernet, muab cov haujlwm xws li kev tshawb nrhiav, kev tshuaj xyuas, thiab kev tswj xyuas lub zog ntse. Raws li kev ua raws li IEEE cov qauv, PSEs tau muab faib ua cov qauv PSEs thiab tsis yog - qauv PSEs (piv txwv li, tus qauv PoE keyboards thiab tsis yog - qauv PoE keyboards).
Powered Device (PD): Qhov no yog hais txog cov khoom siv IP davhlau ya nyob twg uas tau txais lub zog los ntawm PSEs (xws li IP xov tooj, wireless APs, lub koob yees duab network, thiab lwm yam khoom siv hluav taws xob). Raws li kev ua raws li IEEE cov qauv, PDs tau muab faib ua cov qauv PDs thiab tsis yog - qauv PDs.

PoE Power Supply Txoj Cai

Raws li IEEE 802.3af, IEEE 802.3at, thiab IEEE 802.3bt cov qauv, nyob rau hauv ib lub sijhawm tshwj xeeb, PSE yuav tsum ua kom tiav qhov kev tshawb nrhiav thiab kev faib tawm ntawm cov khoom siv txuas nrog lub davhlau ya nyob twg, tom qab ntawd txiav txim siab seb puas yuav muab lub zog rau nws thiab yuav xa lub zog npaum li cas. Cov kev cai no ua kom ntseeg tau tias cov khoom siv tsis sib xws tsis raug puas los ntawm 48V fais fab mov. Yog li, lub luag haujlwm tseem ceeb ntawm PSE suav nrog kev kuaj xyuas seb puas muaj cov cuab yeej siv tau (PD) txuas nrog lossis txiav tawm ntawm lub kaw lus, faib cov kev xav tau ntawm lub zog ntawm PD, thiab muab lub zog tsim nyog lossis txiav tawm lub zog hluav taws xob.

PoE Kev Siv Hluav Taws Xob

Xeev	Muaj nuj nqi	Lus hais
Kev kuaj pom	Cov cuab yeej PSE kuaj pom muaj cov khoom siv PD. PSE ib ntus tso tawm qhov tsis tshua muaj tam sim no - qhov txwv tsis pub muaj hluav taws xob ntawm qhov chaw nres nkoj txhawm rau txheeb xyuas qhov tsis kam thiab qhov muaj peev xwm ntawm cov cuab yeej PD, yog li txiav txim siab seb PD puas nyob. Qhov ntsuas hluav taws xob raug rau qhov kev tshawb pom no yog 2.7V txog 10.1V, thiab lub voj voog tshawb pom yog 2 vib nas this.	PSE tsuas yog mus rau theem tom ntej yog tias kuaj pom PD siv tau. Cov txheej txheem rau kev kuaj xyuas PD lub xub ntiag yog: tus nqi tsis kam ntawm 19kΩ thiab 26.5kΩ, thiab tus nqi capacitance tsis tshaj 150nF.
Kev faib tawm	PSE Txiav txim siab PD Power Consumption. Tom qab PSE kuaj pom PD siv tau, nws yuav muab qhov hluav taws xob ntawm 15V thiab 20V rau PD thiab txiav txim siab PD cov chav kawm fais fab los ntawm kev ntsuas qhov kos tam sim no. Cov chav kawm fais fab sib txawv sib txawv rau qib sib txawv.	Kev faib hluav taws xob theem thiab cov lus ntsuas hluav taws xob muaj nyob hauv qab no.
Hwj chim	Tom qab PSE txiav txim siab lub hwj chim chav kawm ntawm PD, nws pib muab lub hwj chim rau lub cuab yeej raws li qhov sib thooj zog.	Cov khoom siv PSE pib muab lub zog rau cov khoom siv PD los ntawm qhov tsis tshua muaj hluav taws xob, nce mus txog 48V DC. Cov txheej txheem no tshwm sim hauv lub sijhawm pib (feem ntau tsawg dua 15μs).
Tiag -time Transport Raws tu qauv (RTP) & Fais fab Management (PM)	Tom qab qhov hluav taws xob nce mus txog 48V, PSE muab qhov ruaj khov thiab txhim khu kev qha 48V DC lub zog rau PD cov cuab yeej, kom ntseeg tau tias PD lub zog siv tsis pub dhau lub PSE lub zog tso zis ntau tshaj.	Thaum lub sijhawm no, PSE txuas ntxiv saib xyuas rau PD disconnection thaum muab lub zog. Cov zis hluav taws xob: -48V
Kev txiav tawm	Thaum lub sij hawm muab hluav taws xob cov txheej txheem, PSE txuas ntxiv saib xyuas cov tswv yim tam sim no rau PD. Yog tias PD qhov kev siv tam sim no poob qis dua qhov tsawg kawg nkaus los yog nce sai heev -xws li thaum lub cuab yeej tsis txuas, lossis thaum muaj PD lub zog dhau, luv luv, lossis dhau ntawm PSE lub peev xwm muab hluav taws xob ntau dua -PSE yuav txiav tawm lub hwj chim thiab rov pib cov txheej txheem tshawb nrhiav.	Yog tias PD raug txiav tawm, PSE yuav kaw sai sai ntawm qhov chaw nres nkoj cov zis hluav taws xob (feem ntau nyob rau hauv 300-400ms). Cov xwm txheej chaw nres nkoj yuav rov qab mus rau Lub Xeev Kev Tshawb Fawb.