User`s guide

Storage System Rack
007-4522-003 29
Power Distribution Units (PDUs)
The power distribution units (PDUs) mounted in the rear of the rack provide power to
the enclosure and switch bays. The breakers on the PDUs also provide a power on/off
point for the rack and enclosures. See Figure 1-21 for socket and breaker locations and
functions. All sockets in the PDUs are rated at 200 to 240 VAC, with a maximum load per
bank of outlet sockets of 8 A, and are labeled as such. The sockets are connected to
equipment in the bays as follows:
• Socket 1 at the top of each PDU is for the 2U bay at the top of the rack that houses
the SGI Fibre Channel hub or one or more Fibre Channel switches.
• Sockets 2 through 12 on each PDU are for the 11 3U bays, which accommodate 2 Gb
TP9100 enclosures.
Warning: The power distribution units (PDUs) contain hazardous voltages. Do not
open the PDUs under any circumstances.
Figure 1-21 shows the PDUs and describes the function of the sockets and breakers.