Chapter 4. Power Supply
Note: Some adapters and hard disk drives draw more current than the recommended limits. These
adapters and drives can be installed in the system; however, the power supply will shut down if the
total power used exceeds the maximum power that is available.
Output Protection
The power supply protects against output overcurrent, overvoltage, and short circuits. See the power
supply specifications on the previous pages for details.
A short circuit that is placed on any dc output (between outputs or between an output and dc return)
latches all dc outputs into a shutdown state, with no damage to the power supply. If this shutdown state
occurs, the power supply returns to normal operation only after the fault has been removed and the power
switch has been turned off for at least one second.
If an overvoltage fault occurs (in the power supply), the power supply latches all dc outputs into a
shutdown state before any output exceeds 130% of the nominal value of the power supply.
Connector Description
The power supply for the IntelliStation E Pro has four, 4-pin connectors. The total power used by the
connectors must not exceed the amount shown in “Component Outputs” on page 24. For connector pin
assignments, see Appendix A, “Connector Pin Assignments” on page 50.
Figure 19. Internal SCSI Drives
Hard Drive
Supply Voltage
Maximum Current
Regulation Limits
9.1 GB
+
5.0 V dc
960 mA (startup max.); 800
mA (idle avg.); 1090 mA
(operating max.); 1180 mA
(peak seek)
+
5.0% to
−
5.0%
9.1 GB
+
12.0 V dc
1700 mA (startup max.); 600
mA (idle avg.); 840 mA
(operating max.); 2200 mA
(peak seek)
+
5.0% to
−
5.0%
Chapter 4. Power Supply
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