HP EVA6400 Array Instrukcja Użytkownika Pobierz pdf (Strona 22)

Figure 17 Dual PDU—rear view

3. Main circuit breaker1. PDU B

4. Circuit breakers2. PDU A

PDU A

PDU A connects to AC PDM A1–A4.

A PDU A failure:

• Disables the power distribution circuit

• Removes power from from the left side of the rack

• Disables disk enclosure PS 1

• Disables the left power supplies in the controllers

PDU B

PDU B connects to AC PDM B1–B4.

A PDU B failure:

• Disables the power distribution circuit

• Removes power from the right side of the rack

• Disables disk enclosure PS 2

• Disables the right power supplies in the controllers

PDMs

Depending on the rack, there can be up to eight PDMs mounted in the rear of the rack:

• The PDMs on the left vertical rail connect to PDU A

• The PDMs on the right vertical rail connect to PDU B

Each PDM has seven AC receptacles. The PDMs distribute the AC power from the PDUs to the

enclosures. Two power sources exist for each controller pair and disk 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.

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HP EVA6400 Array Instrukcja Użytkownika Strona 22