Dell R420xr owner manual For temperatures between 40 C and 45 C, de

Power

Heat dissipation	2132 BTU/hr maximum (redundant, 550 W power
NOTE: Heat dissipation is calculated	supply)
using the power supply wattage
rating.
Voltage	100–240 V AC, autoranging, 50/60 Hz

NOTE: This system is also designed to be connected to IT power systems with a phase to phase voltage not exceeding 230 V.

Battery

Coin-cell battery 3 V CR2032 Lithium coin cell

Expanded Operating Temperature

NOTE: When operating in the expanded temperature range, system performance may be impacted.

NOTE: When operating in the expanded temperature range, ambient temperature warnings may be reported on the LCD and in the System Event Log.

< 10% of annual operating hours	5 °C to 40 °C at 5% to 85% RH with 26 °C dew
	point.
	NOTE: Outside the standard operating
	temperature (10 °C to 35 °C), the system can
	operate down to 5 °C or up to 40 °C for a
	maximum of 10% of its annual operating
	hours.
	For temperatures between 35 °C and 40 °C, de-
	rate maximum allowable dry bulb temperature by
	1 °C per 175 m above 950 m (1 °F per 319 ft).
< 1% of annual operating hours	–5 °C to 45 °C at 5% to 90% RH with 26 °C dew
	point.
	NOTE: Outside the standard operating
	temperature (10 °C to 35 °C), the system can
	operate down to –5 °C or up to 45 °C for a
	maximum of 1% of its annual operating hours.
	For temperatures between 40 °C and 45 °C, de-
	rate maximum allowable dry bulb temperature by
	1 °C per 125 m above 950 m (1 °F per 228 ft).
Expanded Operating Temperature Restrictions	• Do not perform a cold startup below 5 °C.
	• Allow processor performance degrade.
	• Non-redundant power supplies are not
	supported.
	• Non Dell qualified peripheral cards and/or
	peripheral cards are not supported.

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