HP 743 Series Technical Reference Manual For Oems page 141

Power Requirements
Power Distribution
Table 6-8 Upper Power Supply Current Budgeting Worksheet
VME Slot 8
VME Slot 7
VME Slot 6
VME Slot 5
VME Slot 4
VME Slot 3 or PMC cards
in Expansion Adapter*
* +3.3 current must be entered into.Table 6-5 or Table 6-6
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 +3.3 Vdc source and a +5 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 for slots 3 and 4. For example, if the card in
slot 1 draws 25 W at +3.3 V dc, only 14.8 W at +3.3 V dc is available to a card in slot 2. The limits of
+ 5 Vdc is 25 W per slot
6-12
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Location Device
Total Current
Required:
Maximum Available:
.
+5V dc +12V dc -12V dc
Amps Amps Amps
34.0A 8.0A 1.5A