07
The redundant power supply is N+1=N (500W+500W=500W) function power supply, each one module is
redundancy when any one module was failed. To be redundant each item must be in the hot swap power
supply module.
There is a single bi-color LED to indicate the power supply status. The Green LED turn ON to indicate that all
the power outputs are available. The Orange LED (Green+Red) turn ON to indicate that the power supply has
stand-by or failed shutdown due to over current, the Red LED turn ON to indicate the Fan of the power supply
has failed. The LED(s) shall be visible on the exterior face of the power supply. 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 displaced.
7.1 Redundancy
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:
AC connects with 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.
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.
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.
7.2 Hot swap requirements
7.3 LED Indicators
7. Redundant power supply function
Summary of Contents for Gemini GM500-G
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