HP 3000 Enterprise Virtual Array - Manual (Page 79)

Figure 27 Rack AC power distribution
1. PDM 1 2. PDM 2
3. PDM 3 4. PDU 1
5. PDM 4 6. PDM 5
7. PDM 6 8. PDU 2
Rack System/E power distribution components
AC power is distributed to the Rack System/E rack through Power Distribution Units (PDU) mounted on the
two vertical rails in the rear of the rack. Up to four PDUs can be mounted in the rack—two mounted
on the right side of the cabinet and two mounted on the left side.
Each of the PDU power cables has an AC power source specific connector. The circuit breaker-controlled
PDU outputs are routed to a group of ten AC receptacles. The storage system components plug directly
into the PDUs.
Rack AC power distribution
The power distribution configuration in a Rack System/E rack depends on the number of storage systems
installed in the rack. If one storage system is installed, only two PDUs are required. If multiple storage
systems are installed, four PDUs are required.
The site AC input voltage is routed to each PDU mounted in the rack. Each PDU distributes AC through
ten receptacles directly to the storage system components.
• PDUs 1 and 3 (optional) are mounted on the left side of the cabinet. Power cords connect these
PDUs to the number 1 drive enclosure power supplies and to the controller enclosures.
• PDUs 2 and 4 (optional) are mounted on the right side of the cabinet. Power cords connect these
PDUs to the number 2 drive enclosure power supplies and to the controller enclosures.
Enterprise Virtual Array 3000/5000 user guide 79