There are four power supply units. Both AC and DC power supplies have 12 V output and load sharing. Power supplies vent to the rear of the chassis.
A minimum of one installed power supply is required.
Note
Power supplies do not ship installed.
The following table provides the AC power supply specifications for the 9920:
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Dimensions: |
Height |
1.57 in. (4 cm) |
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Width |
2.89 in. (7.35 cm) |
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Depth |
7.28 in. (18.5 cm) |
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Weight |
2.2 lbs (1 kg) |
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Input voltage range |
100 -127 VAC/200 -240 VAC |
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Input turn on (maximum) |
89 VAC |
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Input frequency |
47 to 63 Hz |
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Input current 240 VAC (typical) |
8.5 Ampere (A) |
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Inrush transient (maximum) |
30 A |
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Efficiency (typical) |
92% for loads greater than 20% of full load 91% for loads 75% to 100% of full load |
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Thermal rating |
539.93 BTU/hour |
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MTBF rating |
250,000 hours |
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Power generated (maximum) |
1,600 watts |
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Power dissipated (maximum) |
158 watts |
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The following table provides the DC power supply specifications for the 9920:
|
Dimensions: |
Height |
1.57 in. (4 cm) |
|
Width |
2.89 in. (7.35 cm) |
|
|
Depth |
7.28 in. (18.5 cm) |
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Weight |
2.2 lbs (1 kg) |
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Input voltage range |
–48 VDC minimum to –60 VDC maximum |
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Input current |
75 A with input voltage great than 40 VDC |
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Cold start Inrush current (maximum) |
35 A |
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Turn on delay (typical) |
5 secs |
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Efficiency |
88% for loads greater than 25% of full load 91% for loads 75% to 100% of full load |
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Thermal rating |
539.93 BTU/hour |
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MTBF rating |
200,000 hours |
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Power generated (maximum) |
1,600 watts |
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Power dissipated (maximum) |
461 watts |
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Operating temperature |
0°C to 50°C (normal operation) |
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Storage temperature |
-40°C to 70°C |
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Operating humidity |
85% relative humidity, non-condensing at 30C |
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Operational shock |
30 m/s2 (3 G) |