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
22 EVA6400/8400 hardware
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