C.1.15 Control Signals
With the exception of the PowerOn signal, all power supply control signals are at TTL signal levels.
|
Parameter |
Minimum |
Maximum |
|---|---|---|
|
VOH (high-level output voltage) |
2.4 VDC |
|
|
VOL (low-level output voltage) |
|
0.4 VDC |
|
VIH (high-level input voltage) |
2.0 VDC |
|
|
VIL (low-level input voltage) |
|
0.8 VDC |
C.1.15.1 Remote Enable PowerOn
A remote interface can enable the DC outputs with a low signal to the PowerOn input and the DC outputs with a high signal to the PowerOn input. The signal is interfaced to the power supply through the main logic board and the power distribution board.
C.1.15.2 System Unit Power Budget
The following subsections present the system unit power budgets.
PCI Cards
The PCI card power budget supports a total of 60 watts, which is distributed among four PCI cards in an arbitrary way as long as the total PCI power does not exceed 60 watts.
The following table lists 5 VDC PCI card power estimates
|
Voltage Rail (VDC) |
PCI Cards (Maximum Number) |
Current Each (Amps) |
Current Total (Amps) |
Total Power (Watts) |
|---|---|---|---|---|
|
5 |
4 |
3.0 |
12.0 |
<= 60 for all voltage rails combined |
|
3.3 |
0 |
0 |
0 |
|
|
+12 |
4 |
0.4 |
1.6 |
|
|
-12 |
4 |
0.1 |
0.4 |
.
The following table lists 3.3VDC PCI card power estimates.
|
Voltage Rail (VDC) |
PCI Cards (Maximum Number) |
Current Each (Amps) |
Current Total (Amps) |
Total Power (Watts) |
|---|---|---|---|---|
|
5 |
0 |
0 |
0 |
<= 60 for all voltage rails combined |
|
3.3 |
4 |
4.5 |
18.0 |
|
|
+12 |
4 |
0.4 |
1.6 |
|
|
-12 |
4 |
0.1 |
0.4 |
Memory System
The following table lists the memory system power budget.
|
Number of DIMMs |
WC Current Total (Amps) |
Total Power @5 VDC (Watts) |
|---|---|---|
|
16 |
9.33 |
46.66 |
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