OCPRF100 MP Server System Technical Product Specification
Revision 1.0
of that power supply is necessary. A “low” state indicates the power supply failure. The power supply failure signal is an output signal from the power supply to the system.
Table
Power Supply Failure Signal | Voltage Level † |
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LOW STATE (power supply failure) | 0.4 V max |
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HIGH STATE (power supply OK) | 4 V min |
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†Measured relative to the power supply DC common output ground pins.
5.6.7Power Supply Kill (Input)
The power supply kill signal is available on the power supply connector. The mating pin of this signal on the backplane should be tied to ground potential on the backplane. Internal to the power supply, the power supply kill pin should be connected to the +5 V standby through a pull- up resistor.
Upon receiving a low state signal at the power supply kill pin, the power supply will be allowed to turn on. A logic low on this pin by itself should not turn on the power outputs. With the power supply kill signal in a low state, a logic high signal on the power supply on signal will be able to turn on the power supply.
When this pin is pulled up high (power supply is extracting from the backplane), the power supply should be shut down immediately without any delay, regardless of the condition of the PS_On signal.
The truth table for the logic of power supply kill and power supply on is shown in Table
Table
Power Supply Kill | Power Supply On | Power Supply Conditions |
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Low | High | DC outputs are On |
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X | Low | DC outputs are Off |
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High | X | DC outputs are Off |
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The characteristics of the power supply kill signal are shown in Table
65