HP 6100 HP 4x00/6x00/8x00 Enterprise Virtual Array User Guide (5697-0733, Marc - Page 61
Pdu 1, Pdms, Caution, Rack Pdm
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PDU 1 PDU 1 connects to AC power distribution source 1. A PDU 1 failure: • Disables the power distribution circuit. • Removes power from PDMs 1, 2, and 3. • Disables PS 1 in the drive enclosures. • Disables the upper controller power supply. PDU 2 PDU 2 connects to AC power distribution source 2. A PDU 2 failure: • Disables the power distribution circuit. • Removes power from PDMs 4, 5, and 6. • Disables PS 2 in the drive enclosures. • Disables the lower controller power supply. PDMs There are six PDMs mounted in the rear of each rack: • Three mounted on the left vertical rail connect to PDU 1. • 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 28 Rack PDM 1. Power receptacles 3. AC power connector 2. Thermal circuit breakers Racks 61