Lenovo PC 300PL Technical Information Manual 6275, 6285 - Page 39

Output Protection, Connector Description

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Chapter 4. Power Supply Figure 20. Internal DASD Supply Voltage +5.0 V dc +12.0 V dc Maximum Current 1400 mA 1500 mA at startup, 400 mA when active Regulation Limits +5.0% to −5.0% +5.0% to −5.0% 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 300 Types 6275/6862 have four, 4-pin connectors, and the PC 300 Types 6285/6892 and have six, 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 52. Chapter 4. Power Supply 27

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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 300 Types 6275/6862 have four, 4-pin connectors, and the PC 300 Types
6285/6892 and
have six, 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
52.
Figure 20. Internal DASD
Supply Voltage
Maximum Current
Regulation Limits
+
5.0 V dc
1400 mA
+
5.0% to
-
5.0%
+
12.0 V dc
1500 mA at startup, 400 mA when
active
+
5.0% to
-
5.0%
Chapter 4.
Power Supply
27