HP Model 748 HP Model 748 Service Handbook - Page 38

worksheet has a column whose current totals exceed the maximum available, quired line.

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Configuration Power Budgeting 3 Write in the board computer's concurrent requirements in the line provided for VME slots 1 and 2 in the Lower Power Supply Worksheet (Table 3-7). 4 Determine each device's current requirements from the Internal Device Requirements table and the VME accessory card's specifications sheet (Table 3-5). 5 Write in each device's current requirements in the spaces provided in the Upper or Lower Power Supply current budgeting worksheets (Table 3-6 and Table 3-7). 6 Total each column in both worksheets, then write the total in the Total Current Required line. 7 If either worksheet has a column whose current totals exceed the maximum available for that column's voltage, you must reduce the number of devices to lower the total current being drawn at that voltage. You may be able to relocate VME accessory cards between the upper eight and lower two slots to reduce the power required from either power supply. 3-6

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Configuration
Power Budgeting
3-6
3
Write in the board computer’s concurrent requirements in the line provided for VME
slots 1 and 2 in the Lower Power Supply Worksheet (Table 3-7).
4
Determine each device’s current requirements from the Internal Device Requirements
table and the VME accessory card’s specifications sheet (Table 3-5).
5
Write in each device’s current requirements in the spaces provided in the Upper or
Lower Power Supply current budgeting worksheets (Table 3-6 and Table 3-7).
6
Total each column in both worksheets, then write the total in the Total Current Re-
quired line.
7
If
either
worksheet has a column whose current totals exceed the maximum available
for that column’s voltage, you must reduce the number of devices to lower the total cur-
rent being drawn at that voltage. You may be able to relocate VME accessory cards be-
tween the upper eight and lower two slots to reduce the power required from either
power supply.