User Manual

Storage System Hardware Components
132 Enterprise Virtual Array 3000 User Guide
Rack AC Power Distribution
The power distribution in an Enterprise rack is the same for all configurations.
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 Figure 59.
■ PDMs 1 through 4 connect to receptacles A through D on PDU 1. Grey power
cords connect these PDMs to the number 1 drive enclosure power supplies
and to the controller enclosures.
■ PDMs 5 through 8 connect to receptacles A through D on PDU 2. Black
power cords connect these PDMs to the number 2 drive enclosure power
supplies and to the controller enclosures.
PDU 1 connects to AC power distribution source 1. A PDU 1 failure:
■ Disables the power distribution circuit
■ Removes power from PDMs 1, 2, 3, and 4
■ Disables PS 1 in the drive enclosures
■ Disables one of the controller power supplies
PDU 2 connects to AC power distribution source 2. A PDU 2 failure:
■ Disables the power distribution circuit
■ Removes power from PDMs 5, 6, 7, and 8
■ Disables PS 2 in the drive enclosures
■ Disables one of the controller power supplies