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Power Supply
Your computer is equipped with one of the following 180-W power supply units (see
A fixed-voltage power supply — Computers with a fixed-voltage power supply do not have a voltage selection switch on the
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only one voltage (see the regulatory label on the outside of the computer for its operating voltage).
An auto-sensing voltage circuit — Computers with an auto-sensing voltage circuit do not have a voltage selection switch on the back panel and
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automatically detect the correct operating voltage.
A manual voltage selection switch — Computers with a voltage selection switch on the back panel must be manually set to operate at the correct
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operating voltage.
The power supply provides the DC operating voltages and currents listed in the following table.
1
Output Voltage
+12 VDC
+5 VDC
+3.3 VDC
–12 VDC
+5 VFP
1
Outputs meet and do not exceed SELV requirements per electrical standards (UL 1950, IEC 950, or EN60950 Par. 2.3).
2
Maximum continuous combined load on +5 VDC and +3.3 VDC outputs do not exceed 80 W.
3
+5 VDC minimum load is 0.2 A when there is a minimum load of 0.3 A on the +12 VDC and 0.42 A on the +3.3 VDC outputs simultaneously. +5 V minimum
load is 1 A for load transient tests.
4
In system configurations where +3.3 VDC is not used, all other outputs stay within regulation while the +3.3 VDC output is in a zero load condition.
DC Power Connectors
Power Supply DC Connector Pin Assignments
Regulation
Minimum Current (A)
+/–5%
0.0
3
+/–5%
1.0/0.2
+/–5%
4
0.1/0.0
+/–10%
0.0
+/–5%
0.0
"Safety
Instructions" for more information):
Maximum Current (A)
10.0
12.0
10.0
0.5
2.0
back panel
and operate at
2
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