HP Model 748 HP Model 748 Service Handbook - Page 42

Table 3-6, Upper Power Supply Current Budgeting, Worksheet, Location, Device, 5V dc, 12V dc

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Configuration Power Budgeting Table 3-6 Upper Power Supply Current Budgeting Worksheet Location Device +5V dc +12V dc -12V dc Amps Amps Amps VME Slot 8 VME Slot 7 VME Slot 6 VME Slot 5 VME Slot4 VME Slot 3 or PMC cards in Expansion Adapter1 Total Current Required: Maximum Available: 34.0A 8.0A 1.5A 1. +3.3 current must be entered into Table 3-3 or Table 3-4 CAUTION: If you upgrade your Model 748 ruggedized workstation, adding more: RAM cards, mass storage devices, GSC, VME, EISA, PCI, or PMC accessory cards, you must recompute the power budget to ensure the new configuration will be within the available current each power supply can provide. NOTE: The PCI tray provides power for option cards from both a +5 Vdc source and a +3.3 Vdc source. Cards may use either or both power sources, up to 25W per slot. However, the +3.3 V dc source is limited to 39.8 W combined for slots 1 and 2, and 39.8 W combined 3-10

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Configuration
Power Budgeting
3-10
CAUTION:
If you upgrade your Model 748 ruggedized workstation, adding
more: RAM cards, mass storage devices, GSC, VME, EISA, PCI,
or PMC accessory cards, you must recompute the power budget to
ensure the new configuration will be within the available current
each power supply can provide.
NOTE:
The PCI tray provides power for option cards from both a +5 Vdc
source and a +3.3 Vdc source. Cards may use either or both power
sources, up to 25W per slot. However, the +3.3 V dc source is
limited to 39.8 W combined for slots 1 and 2, and 39.8 W combined
Table 3-6
Upper Power Supply Current Budgeting
Worksheet
Location
Device
+5V dc
Amps
+12V dc
Amps
-12V dc
Amps
VME Slot 8
VME Slot 7
VME Slot 6
VME Slot 5
VME Slot4
VME Slot 3
or PMC cards
in Expansion
Adapter
1
Total Current
Required:
Maximum Available:
34.0A
8.0A
1.5A
1. +3.3 current must be entered into Table 3-3 or Table 3-4