Unisys Aquanta CP Series, Configuration Manual

Page: 78 / 89

System Specifications
3814 9779–000 A–21
Power Supply Assembly
The power supply assembly provides 80 watts of DC power. The DC output is
sufficient to power the system board, three internal mass storage devices, the optional
sound module, and up to two PC-AT/PCI compatible expansion boards. Power is
distributed from the power supply through one twelve-pin connector cable to the
system board. Additionally, +5VDC and +12VDC power is supplied to mass storage
devices through one standard 4 pin connector.
Table A–17. Power Supply Voltages
Voltage Range Current Load Max Ripple/
(Vdc) (%) Min. (A) Max. (A) Noise (mV p-p)
+5V +5.25/+4.75 3.0 10.0 50
+12V +12.6/+11.4 0.5 2.0 120
-12V +13.2/-10.8 0.0 0.5 120
+5V -4.5/-5.5 0.0 0.5 120
The voltage selection is automatic. You do not have to select the voltage because it is
a universal power supply.
The power supply supports input Voltage ranging from 90VAC to 260VAC. The input
frequency can range from 47Hz to 63Hz.
The power supply assembly includes a built-in fan to provide cooling for the system
electronics as well as cooling for the power supply circuitry. The thermally controlled
fan provides air flow through the power supply at up to 17CFM.