HP StorageWorks Enterprise Modular Library E-Series user guide (AH876-96001, October 2007)

supplies in the library that are allowed by the leakage current specification. You must check the power
ratings of any additional equipment added to the rack, the power rating of the PDU, and the power
rating of the power cords, to make sure all a re within specified limits.
Placement of r
edundant PDU components
The library pr
imary PDU (#1) and t wo power strips (#1 a nd #3) are installed at the factory. The
redundant PDU (#2) is installed above the primary PDU, also in a 0U side mount orientation. The top
of PDU #1 is approximately 33 cm (13 inches) from the caster boss. The top of PDU #2 is placed
approximate
ly 63 cm (25 inches) from the caster boss (see Figure 58 on page 127).
Power strip #2 is placed equ idistant between power strips #1 and #3.
Power strip #4 is placed in a position low in the rack so that it does not interfere with the power cords
coming from P
DU #1 to power strips #1 and #3.
With properl
y placed power strips in a fully redundant 40U configuration, the top six power supply cords
go to power strips #1 and #2. One power cord at each redundant level goes to each power strip.
Similarly, the bottom four power cords in a fully redundant confi guration are divided between power
strips #3 and #4. By using 0.5-m (15-inch) power cords, the dressing should be minimal.
126
Installing a redundant PDU