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warning:
Before testing -48VDC power source:
•
Ensure that no power is being provided to the system from the –48VDC
power source, such as a power board
•
Ensure that no circuit cards are installed in the shelves
•
Remove all fuses from the fuse and alarm panels
•
Recheck wiring and connections for proper polarity
warning:
Always install an isolator pad between the frame and ground. Oracle frames
are shipped with isolator pads to completely isolate the frames from ground.
If a non-Oracle frame is used, an isolator pad must be provided.
warning:
Frames with HCMIM cards require 60A breakers, ELAP frames use 30A and
60A breakers, and EPAP frames use 30A breakers. Existing frames that are
fused at 40A can be upgraded to support 60A with a FAP upgrade kit.
warning:
Verify that all breakers for application servers are set to the OFF (O) position.
An application server chassis is redundantly powered from both A and B
-48VDC buses. Ensure that both the circuit breaker supplying A power to the
chassis and the circuit breaker supplying B power to the chassis are turned
OFF by measuring the voltage with a VOM on the cable that connects the
chassis to its breakers. Both A and B power LEDs on the front panel of the
chassis should be OFF.
Caution:
Redundant systems allow service during normal maintenance. When repairs
require a total power disconnect, both input supply sources must be
disconnected. This causes service interruption and takes down the systems.
Caution:
This equipment has a connection between the earthed conductor of the DC
supply circuit and the earthing conductor.
Chapter 2
Power
2-4
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