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7.2 Hot Swap Requirements

The redundant power supply modules shall be hot swappable. Hot swapping a power supply is

the process of inserting and extracting a power supply from an operating. During this process

the output voltage shall remain within the limits specified in Table 7 with the capacitive load

specified Table 9. The Sub-system shall not exceed the maximum inrush current as specified

in section 2.2. The power supply can be hot swapped by the following methods:

7.3 LED Indicators

There shell be a single bi-color LED.

The GREEN LED shall turn ON to indicate that all the power outputs are available.

The Red LED shall turn ON to indicate that the power supply has failed, shutdown due to over

current, or shutdown due to component failure.The LED(s) shall be visible on the power supply’s

exterior face. The LED location shall meet ESD requirements.

LED shall be securely mounted in such a way that incidental pressure on the LED shall not cause

it to become displaced.

Many variations of the above are possible. Supplies need to be compatible with these different

variations depending upon the sub-system construction. In general, a failed (off by internal latch

or external control) supply may be removed, then replaced with a good power supply(must use

the same model) , however, hot swap needs to work with operational as well as failed power

supplies. The newly inserted power supply may get turned on by inserting the supply into the

system or by system management recognizing an inserted supply and explicitly turning it on.

AC connecting separately to each module. Up to two power supplies may be on a single AC

power source.

Extraction: The AC power will be disconnected from the power supply first and then the

power supply is extracted from the sub-system. This could occur in standby mode or powered

on mode. Insertion: The module is inserted into the cage and then AC power will be connected

to the power supply module.

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For power modules with AC docking at the same time as DC. Extraction: The module is

extracted from the cage and both AC and DC disconnect at the same Time. This could occur

in standby or power on mode. No damage or arcing shall occur to the DC or AC contacts

which could cause damage. Insertion: The AC and DC connect at the same time as the module

is inserted into the cage. No damage to the connector contacts shall occur. The module may

power on or come up into standby mode.

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