Power and Signal Distribution
Table
SFF 240-Watt Power Supply Unit Specifications
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| Range/ | Current | Max. | Surge | Max. | |||
| Tolerance | Loading [1] | Current | Current [2] | Ripple | |||
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Input Line Voltage |
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Line Frequency |
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Input (AC) Current |
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+3.3 VDC Output | + 4% | 0.1 | A | 15.0 A | 15.0 A | 50 mV | ||
+5.08 VDC Output | + 3.3 % | 0.3 A | 17.0 A | 17.0 A | 50 mV | |||
+5.08 AUX Output | + 3.3 % | 0.0 A | 3.0 | A | 3.5 | A | 50 mV | |
+12 VDC Output | + 5 % | 0.1 | A | 7.5 | A | 9.0 | A | 120 mV |
+12 VDC Output (Vcpu) | + 5 % | 0.1 | A | 11.0 A | 14.5 A | 120 mv | ||
| + 10 % | 0.0 A | 0.15 A | 0.15 A | 200 mV | |||
NOTES:
Total continuous power should not exceed 240 watts. Total surge power (<10 seconds w/duty cycle < 5 %) should not exceed 260 watts.
[1] The minimum current loading figures apply to a PS On start up only.
Figure 7-3 shows the power supply cabling for the SFF system.
Power Supply
Unit
P4 P7 P5 P2
P4, P5, P7
P3 
5 4 3 2 1
P1 13
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| 4 | 3 | 2 | 1 | 1 |
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| Pin | Pin | Pin |
Conn | Pin 1 | Pin 2 | Pin 3 | Pin 4 | Pin 5 | Pin 6 | Pin 7 | Pin 8 | Pin 9 | 10 | 11 | 12 |
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P1 | +5 | RTN | + 5 | +5 | PS On | RTN | Pwr Gd | +3.3 | +3.3 | Tach | RTN | Fan |
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P1 [1] | +12 | +5 sns | RTN | +5 | +5 | +3.3 | RTN | +3.3 sns | +3.3 | +3.3 | RTN | |
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P2 | +5 | RTN | RTN | +12 |
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P3 | RTN | RTN | RTN | VccP | VccP | +12 |
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P4, 5, | +3.3 | RTN | +5 | RTN | +12 |
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Connectors not shown to scale. All + and - values are VDC. RTN = Return (signal ground) sns = sense
GND = Power ground RS = Remote sense FC = Fan command FO = Fan off
FSpd = Fan speed FS = Fan Sink
POK = Power OK (power good) VccP = +12 for CPU
[1] This row represents pins
Figure 7-3. SFF Power Cable Diagram
| Technical Reference Guide | www.hp.com |