IBM PC 300GL manual Output protection, Connector description

Table 15. Internal DASD

Supply voltage	Maximum current	Tolerance
+12.0 V dc	1500 mA at startup, 400 mA	+5.0% to -5.0%
	when active

Table 16. Video port pin 9

Supply voltage	Maximum current	Tolerance
+5.0 V dc	1100 mA	+5.0% to -5.0%

Note: Some adapters and hard disk drives draw more current than the rated maximums. 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 a 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 power supply value.

Connector description

The power supply for PC 300GL and PC 300PL personal computers 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 26. For connector pin assignments, see “Appendix A. Connector pin assignments,” on page 33.

Chapter 4. Power supply 27