HP EML E-series Tape Libraries - Manual (Page 126)

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 are within specified limits.
Placement of redundant PDU components
The library primary PDU (#1) and two power strips (#1 and #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
approximately 63 cm (25 inches) from the caster boss (see Figure 58 on page 127).
Power strip #2 is placed equidistant 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 PDU #1 to power strips #1 and #3.
With properly 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 configuration 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