Installation guide

Power Classifications and Deployment
Matrix N5 PoE Chassis (7C105-P) Installation Guide 1-7
Power Classifications and Deployment
ThenumberofN‐POE PSMsneededtopowerthePoE‐compliantPDsisdependenton
theirPowerClassifications.EachN‐POE PSMcansupplyupto1200Wattsofpower.You
candeterminethenumberofpowersuppliesneededbyreferringtoTable 1‐1andadding
upthemaximumpowerrequirementaccording
tothePowerClassificationrating
(1 through3)ofeachPD.Keepinmindthateachclassificationrepresentsarangeof
power,soyourmaximumcalculationrepresentsaworst‐casepowerconsumption,butthe
actualpowerconsumptioncouldbeless.
Figure 1‐2showsanexampleofasimpleconfigurationwithoneDFE
series
PoE‐compliantmodule(suchastheEnterasysNetworks7H4385‐49)installedinanN5
chassisandconnectedtosixdevicesrepresentedbythenumberedboxes(1 through6).In
thisexample,assumebox1 representsanon‐PoEcompliantdeviceandboxes2through6
representPoE‐compliantPDs.The
PoEpowersystemprovides48Vdcandpowersupply
statusinformation(indicatesifpowersuppliesareokay)throughtheN5chassis
backplanetothePoEswitchmodule.
Table 1-1 DTE PoE Power Classifications
Class Usage PD Power Range Usage
Class Unknown Default 0.44 to 12.95 Watts
1 Optional 0.44 to 3.84 Watts
2 Optional 3.84 to 6.49 Watts
3 Optional 6.49 to 12.95 Watts
4 Not Allowed Reserved for Future Use