Chapter 1. General description
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Draft Document for Review October 14, 2014 10:19 am
5137ch01.fm
When mounting the horizontal PDUs it is a good practice to place them almost at the top or
almost at the bottom of the rack leaving 2U or more of space at the very top or very bottom of
the open for cable management. Mounting a horizontal PDU in the middle of the rack is
generally not optimal for cable management.
For the Power E870 or E880 installed in IBM 7014 or FC 055x racks, the following PDU rules
apply:
For PDU #7109 and #7188 when using 24 Amp power cord #6654, #6655, #6656, #6657,
or #6658, each pair of PDUs can power one Power E870 or Power E880 system nodes
and two I/O expansion drawers or eight I/O expansion drawers. 24A PDU cables are used
to supply 30A PDUs. In the Figure 1-12 on page 27 you can see the rack configuration
with two pairs of 30A PDUs suppling two system nodes configuration and two I/O
expansion drawers.
Figure 1-12 Two system node configuration and two I/O expansion drawers supplied by 30A PDUs
For PDU #7109 and #7188 when using three phase power cords or 48 Amp power cords
#6491 or #6492, each pair of PDUs can power up to two Power E870 or Power E880
system nodes and two I/O expansion drawer or eight I/O expansion drawers. 48A PDU
cables are used to supply 60A PDU. In the Figure 1-13 on page 28 you can see the rack
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System Node
#1
Control Unit
I/O Expansion Drawer
P4
P3
P1 P2
30A PDU
30A PDU
P1
P2
I/O Expansion Drawer
P1
P2
System Node
#2
Control Unit
I/O Expansion Drawer
I/O Expansion Drawer
P4
P3
P1 P2
P4
P3
P1 P2
30A PDU
30A PDU
30A PDU
30A PDU
P2
P1
P2
P1
