HP XA manual Desktop Parameter Total Rating, Current at +12 Current at -12

1 System Overview

Specifications and Characteristic Data

				Typical per	Typical per
Desktop	Parameter	Total Rating	Notes	PCI	ISA
				Accessory	Accessory
				Slot	Slot
	Current at +12 V	4.4 A	—	0.2 A	0.2 A
	Current at -12 V	0.5 A	—	0.2 A	0.5 A

1.Note that even though the desktop power supply is autoselect, it is not a full range power supply. It works in 2 input voltage range and not in one big 90 V to 240 V range.

2.On minitower models, always check the voltage switch position at first power-on.

	An attempt to draw too much current (such as a short circuit across edge-
	connector pins, or an accessory board that is not suitable for these PC
	Workstations), will cause the overload protection in the power supply to be
	triggered, and the PC Workstation could fail to boot.
	Both power supplied on the desktop and minitower models are new
	compare to the ones used on previous platforms (Vectra VL 6/xxx and XA 6/
	xxx). The difference is at the V standby level, which has been extended to
	deliver 300mA instead of 100mA. This extra current is required by the
	100TX hardware layer so it can perform a remote power-on at reception of a
	magic frame. Using an older power supply for a repair will prevent a remote
	power-on at reception of a magic frame.
NOTE	When the PC Workstation is turned off with the power button on the front
	panel, the power consumption falls below 5 Watts, but is not zero. The special
	on/off method used by this PC Workstation extends the lifetime of the power
	supply. To reach zero power consumption in “off” mode, either unplug the PC
	Workstation from the power outlet or use a power block with a switch. You
	should be aware that the PC Workstation will lose its time settings within a
	few days if you unplug the PC, or switch off the PC Workstation at the power
	block.

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