Technical data

Dual 9-, 12-, and 20-Slot Power Supply
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7
2). When one of each of an AC input and a DC input supply are installed in a system,
and each has appropriate input power and is enabled, the AC input supply operates
and provides 100 percent of the output load, and the DC input supply is in standby
mode, providing no output power.
3). If input power is then removed from the AC input supply, the DC input supply exits
standby mode and enters operating mode, and provides 100 percent of the output
loads. If input power is subsequently re-applied to the AC input supply, it starts and
again provides 100 percent of the output load. The DC input supply simultaneously
exits operating mode and enters standby mode, providing no output power. These
conditions do not cause an output voltage fault.
4). If input power is instead removed from the DC input supply, the AC input supply
continues operating normally, and this does not cause an output voltage fault.
Remote Sensing
Remote sensing of output #1 load automatically compensates for a voltage drop of 0.25
Vdc minimum. If parallel supplies both - sense wires tied to common.
Overshoot
Overshoot does not exceed 2.0% of any output voltage, power failure, enabled,
disabled, and AC input cycle on or off.
Load Change Transient Response
Any DC voltage returns to 1% within 2 mS in response to a 25% load step. Any DC
output does not vary more than 3% in response to a 25% load step.
Undershoot/Reverse Voltage
With respect to its normal zero reference voltage, no output voltage shall, under any
normal condition become a polarity opposite to its normal operation polarity.
(Excluding applying an external reverse voltage.)
+5 Volt Risetime
The +5 volt output transitions from +2 volts to +4.75 Volts in less than 20 mS.
The +5 volt output has a monotonic rise time.
The maximum allowable overshoot is 2%.
The above conditions is over the complete load range from minimum to maximum
load, with a capacitive load from zero (0) to 2000 ufd.
The above conditions is over the complete input range of the power supply.
Output Disable
The output voltage disables when a DC power fail condition exists and the DC main
output drops 0.5v +/- 0.25 volts out of regulation.
The outputs are re-enabled when the DC input recovers.
Table 7-4. 700 Watt DC Power Supply Specifications (Continued)