User's Manual Part 1

SystemDescription
20
PSU – the rack power supply
ThePowerSupplyUnitprovidesDCpowertotheMasterUnitbackplane.Theunitisshippedas240VACor115VAC
unitsdependingonthecountry.A‐48VDCinputisofferedasanoption.
Figure 18 PSU
ACPowerSupply
DCPowerSupply
Functional description
TheACpowersupplycanhandl
eupto16cardsoronechassisfullofcards.TheDCpowersupplyiscapableof
handling11cardsoronefullchassisthatincludestheDCpowersupply.
Allconnectorsar
eonthefrontsideofthepowersupply. Figure18 showsthePSUequippedwithEuropeanpower
inlet.
ThePSUoutputsar
etwo10‐pinMolexconnectors,theseareconnectedtothechassistosupplypower.One
connectorshouldalwaysbeconnectedtothechassisholdingthePSU(fordrivingthefans).
Onechassisca
nholdupto4powersupplies.TwoPSU’smaybeconnectedtoachassistoprovidere dundancy.
Table 14 PSU Specifications
Parameter Value
Inputpowervoltage,Mains 86‐264VAC
Inputpowerfrequency,Mains 50/60Hz
Operatingtemperature 0to45°C(32to113°F)
Powerrating 240W
Width 4cardslots