User's Manual

FlexWave Prism Remote Unit and HDM RF Module Installation Guide 320000117795 Rev A • FWPP-501-01 Issue 1
Page 76 © March 2016 CommScope, Inc.
Install the Prism Remote Unit
DETERMINE THE CIRCUIT BREAKER OR FUSE FOR THE PRU
AnAC-poweredPRUsupportspowerinputfroma90to240Vacpowersupply.ADC-poweredPRU
supportspowerinputfroma-40to-60Vdcpowersupply.
Power Consumption
1 Calculatethemaximumpowerconsumption,whichdeterminesthecircuitbreakerorfusetouse.
a ReviewthePRUordertodeterminethenumberofDARTs,numberofpowersupplies,andthe
numberofSFPs.UsethisinformationtofindthepowerconsumptionfromTable22onpage76
andTable23onpage77.
b Enterthepowerconsumptioninthespacesprovidedbelow.
c AddtheWattsandenterthetotalintheTotalPowerConsumptionfield.
2 DividethetotalWattsbytheinputVoltagetodeterminethecurrent(Amperes)requirements:
TotalWatts/InputVoltage=Amps
3 Determinethecircuitbreakerorfusesizebasedonlocalcodesandpractices.
CAUTION! Circuit breaker or fuse size must be 20 Amps or less to protect the internal wiring of the PRU.
Power Consumption Tables
ThePRUpowersuppliesare>80%efficient,bothACandDCversions.ThedatainTable22andTable23
onpage77andthepower-supplyefficienciescanbeusedtoestimatetheinputcurrentforagivenPRU
configuration.Tocalculatetheinputcurrentdrawusethefollowingequation:
Input Current = (Total Power Consumption / 0.80) / Input Voltage
Forexample,foraPRUwith1SeRFModule,1SFP(36WTypical,38WMax),andasingle20W850/1900
HDMRFModule(250WTypical,330WMax),thentheTotalPowerConsumptionwouldbe286W
(Typical)and368W(Max).Therefore,fora110VACinput,thecurrentestimatewouldbe3.25amps
(Typical)and4.18amps(Max).
SeRFModulepowerconsumptionfromTable22onpage76 _________Watts
AdditionalSFPs_____x1.25W _________Watts
RFModulepowerconsumptionfromTable23onpage77 _________Watts
TotalPowerConsumption _________Watts
Table 22. SeRF Module Power Consumption
SeRF Module
Power Consumption per Module
Nominal (W) @ 25C Maximum (W)
SeRF Module (1 SFP) [add 1.25W for each SFP added] 36 38