IBM BNT RackSwitch G8124DC, Installation Manual

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Introduction
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11
Each power supply can be connected to a separate DC power source to mitigate the risk of down
time during a power failure. When used in a redundant configuration, the dual power supplies have
a load-sharing capability that allows each supply to operate at approximately 50 percent of full load.
Using redundant power can minimize the power disruption during a power supply failure and
extend the expected lifetime of each supply by operating normally in a conservative power mode.
There is no power switch on the G8124; the switch unit powers up when power is supplied through
the DC power source.
The Power Supply LED indicates the status of the power supplies. The LED blinks when only one
DC power source is connected, and lights steady when both DC power sources are connected.
Note – DC power is not available for the RackSwitch G8124-E.
Circuit breaker rating Minimum: 20 amps
Maximum: 20 amps
Wire size 16 AWG (IBM part number 90Y3538 DC power cable from PDP
output to server input)
1.31 mm2
Wiring terminal screw torque -- inch-pounds (IBM part number 90Y3538 provided with
connector, both ends)
-- newton-meters