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192 Power System: Description/Calculating Power Usage
Power Supply Input Voltages
Table 34. Power Supply AC Input Ratings
Parameter Minimum Nominal Maximum Units
V in (230) 90 / 180 110-120 / 200-240 132 / 264 V RMS
V in Frequency 47 50 / 60 63 Hz
AC Input Current 13 A @ 110 VAC
7 A @ 220 VAC
Ampere
The 750 watt autoranging power supplies are capable of handling up to two hard drives at 28 watts
per drive (typical 3.5-inch wide by 1-inch high, 10 K RPM drives), eight processors at a maximum
of 65 watts per processor, and up to 32 GB of PC100 registered DIMMs.
The total power requirement for the board set exceeds the 240 VA energy hazard limit that defines
an operator-accessible area. The 240 VA protection circuits protect the user from a
240 VA energy hazard while hot-swapping—installing or removing—a hard disk drive or fan
system.
Power Supply Output Voltages
Table 35. Power Supply Output Ratings (110 V / 220 V)
Power Supply Outputs Individual Supply
Two Supplies
1
Nonredundant
Three Supplies
1
Redundant
3.3 V 31 A / 36 A 58 A / 68 A 58 A / 68 A
5 V 31 A / 36 A 58 A / 64 A 58 A / 64 A
12 V 31 A / 36 A 58 A / 68 A 58 A / 68 A
-12 V 1 A 1 A 1 A
5 V Standby 1 A 1.75 A 1.75 A
Vbias = + 15 V 200 mA 200 mA 100 mA
1 Forced load sharing is for 5, 3.3, and 12 V only. The +5 V standby load sharing is the technique for passive load
sharing.