Rack Ac Power Distribution; Rack Pdm - HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual

• Three mounted on the right vertical rail connect to PDU 2.
Each PDM has eight AC receptacles and one thermal circuit breaker. The PDMs distribute the AC
power from the PDUs to the enclosures. Two power sources exist for each controller pair and drive
enclosure. If a PDU fails, the system will remain operational.
CAUTION:
The AC power distribution within a rack ensures a balanced load to each PDU and reduces the
possibility of an overload condition. Changing the cabling to or from a PDM could cause an overload
condition. HP supports only the AC power distributions defined in this user guide.
Figure 18 Rack PDM
.
1. Power receptacles
3. AC power connector

Rack AC power distribution

The power distribution in an Enterprise Virtual Array rack is the same for all variants. The site AC
input voltage is routed to the dual PDU assembly mounted in the rack lower rear. Each PDU distributes
AC to a maximum of four PDMs mounted on the left and right vertical rails (see
• PDMs 1 through 4 connect to receptacles A through D on PDU 1. Power cords connect these PDMs
to the number 1 drive enclosure power supplies and to the upper controller enclosure.
• PDMs 5 through 8 connect to receptacles A through D on PDU 2. Power cords connect these PDMs
to the number 2 drive enclosure power supplies and to the lower controller enclosure.
NOTE:
The locations of the PDUs and the PDMs are the same in all racks.
32 EVA6400/8400 hardware
2. Thermal circuit breakers
Figure 19).