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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 PC 300PL Personal Computer has four 4-pin connectors for internal devices.
The total power used by the connectors must not exceed the amount shown in “Component outputs” on
page 19. For connector pin assignments, see Appendix A, “Connector pin assignments” on page 25.
20 Technical Information Manual