Data General AViiON 4600 Series, Customer Documentation

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Expanding and Maintaining Your Computer System
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014–002091
Enter each memory module at the average" current draw listed in
Table A-1. This incorporates active," peak," andpassive"
current draws into a single calculated value.
2. Calculate the total amount of current needed by your system devices by adding
the values in each column. Enter the totals on your calculation form in the
CalculatedTotals" column of the Power Supply/Amperage section.
3. Compare the current limits with your current totals from step 2.
If any current draw total exceeds the limit for that power source, your proposed
configuration will not work; recalculate your current requirements and/or plan
another system configuration.
If the current draws are within the maximum provided by each power source,
continue verifying your power requirements by calculating the wattage total for
the plannedsystem.
4. Multiply the number of volts from each dc power source (5, 12, and 12) by the
corresponding amperage totals you calculated in step 2. Enter the results on
your calculation form in the CalculatedTotals" column of the
Power Supply/Wattage section.
5. Addthe wattage values for each voltage source andenter the total in the lower
right corner of your form as Total wattage."
6. Compare the maximum wattage suppliedby your power supply with the total
wattage of all sources from step 5.
If the total wattage consumed by the devices in your proposed configuration
exceeds the capabilities of your computer unit's power supply, the configuration
will not work; recalculate your current requirements and/or plan another system
configuration.
Figure 6Ć1 shows a completedcalculation form for a possible AViiON 530 or 4600 series
computer.