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When installing one or more dc chassis into a rack, a dc PDU is required. When
planning for rack space, make sure to leave room for installing such a unit. Various
manufacturers supply dc PDUs. However, your own company requirements might
determine which manufacturer you can select. For redundant operation, you must
plan on the maximum current for each feed of the BCT. Figure 34 shows a typical
dc PDU.
Power
Power
Figure 34. Typical dc PDU for a single BladeCenter T Type 8720
Power connections for Type 8730
This section provides examples of power diagrams. The examples represent
various ways of providing redundant power sources to BladeCenter T units with four
power supplies. All examples assume IBM Enterprise NetBAY racks are being used.
Use the ac power jumper cords provided with your product, power supply option, or
upgrade kit.
RTN
Feed
-48V
A
Critical
Alarm
Major
Circuit
Minor
-48V
Feed
RTN
B
1
2
3
4
N
Circuit Breakers
1
2
3
4
N
Circuit Breakers
1
2
3
4
N
1
2
3
4
N
Chapter 4. Installation considerations
RTN
-48V
-48V
RTN
65
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