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Xedge Chassis Systems
6. Tighten the four captive screws on the front panel of the power supply to complete its
installation.
7. Turn on the POWER switch of the power supply (the Pwr On indicator should light).
Replacement Procedure
To replace a power supply, perform the following steps:
1. Turn off the POWER switch of the power supply you are replacing.
2. Loosen the four captive screws on the front panel of the power supply.
3. Pull the power supply out of the slot by its handle. There is slight resistance initially until the
power supply connectors disconnect from the slot connectors.
4. Set the power supply aside.
5. Check that the POWER switch of the replacement power supply is off.
6. Carefully insert the power supply into the tracks of the slot.
7. Slide the power supply into the slot until its front panel bottoms out on the chassis (to seat the
power supply properly requires approximately 35 pounds of force).
8. Tighten the four captive screws on the front panel of the power supply to complete its physical
installation.
9. Turn on the POWER switch of the power supply (the Pwr On indicator should light).
Special Considerations
In the rare instance that the Pwr On indicator does not light and/or the Failure indicator does light,
reseat the power supply in its slot by using the preceding instructions. If the Pwr On indicator still
does not light and/or the Failure indicator is still lit, the power supply has failed and you should
contact your authorized field service representative.
Power Redundancy
When the Xedge 6640/6645 chassis is configured for power supply redundancy, the Xedge switch
remains powered under the following circumstances:
•
one power feed fails
•
one power supply fails
To power up a half-loaded chassis and provide power supply redundancy the chassis requires a
minimum of two power supplies (a half-loaded chassis has a maximum power rating of 82.5A at
+5Vdc). This minimum power supply configuration requires one power supply in the A or B power
supply slot and a second power supply in the C or D power supply slot.
To power up a fully-loaded chassis and provide full power supply redundancy, the chassis requires
four power supplies, one in each power supply slot, (a fully-loaded chassis has a maximum power
rating of 165 A at +5Vdc).
In addition to providing power supply redundancy, the chassis also protects the switch from
catastrophic shorts that may occur in a power supply by incorporating blocking diodes on all power
supply outputs
2-36
Xedge 6000 Hardware
Installation & Setup Guide
Xedge 6640/6645 Chassis
032R440-000
Issue 17
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