Dell PowerEdge R220 Technical Guide 41AltitudeOperating –15.2m to 3048m (–50ft to 10,000ft)Storage –15.2m to 10,668m (–50ft to 35,000ft)Airborne contaminant levelClass G1 or lower as defined by ISA-S71.04-1985Power supply specificationsTable 23 lists power supply specifications for the PowerEdge R220.Power supply specificationsSpecification Non-redundant 250WCurrent consumption 4.0–2.0ASupply voltage 100–240V AC1Frequency 50/60HzHeat dissipation(BTU/hr max) 1040Rack rail specificationsTable 24 lists the spacing dimensions for the R220 static rails.ReadyRails adjustability rangeProduct RailidentifierMountinginterfaceRailtypeRail adjustability range (mm) Rail depth (mm)Square Round Threaded withoutCMAwithCMAMin Max Min Max Min MaxR220A4 ReadyRails Static 608 879 594 872 604 890 622 NAA6 ReadyRails Static 5081 751 4941 744 5191 762 51513761 NA1With middle brackets removed2With rear brackets removed (2-post or cantilever mount only)The adjustment range of the rails is a function of the type of rack in which they are being mounted.The min-max values listed above represent the allowable distance between the front and rearmounting flanges in the rack. Rail depth represents the minimum depth of the rail as measured fromthe rack front mounting flanges when the rail rear bracket is positioned all the way forward.