Huawei OceanStor V3 Series Quick Installation Manual page 19

Scenario 2 Connecting a DC power cable
When you connect DC power cables, ensure that the black cable leading from the anode of the DC power
source connects to the RTN (+) terminal and that the blue cable leading from the cathode of the DC power
source connects to the NEG (-) terminal.
Complete view of the DC power cables
DC PDU
Disk enclosure
Controller enclosure
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