Sun Microsystems A3500 manual Connecting to AC Power Source, Power Sequencer Interconnections

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2.5.2Power Connections

2.5.2.1Power Sequencer Interconnections

The front and rear power sequencers in the 2x7 cabinet and the 1x8 cabinet must be interconnected. Make sure an interconnect cable (part number 530-2235-xx) is connected between the OUT on the front sequencer in 2x7 cabinet and the IN on the front sequencer in 1x8 cabinet (FIGURE 2-22). Make sure that the rear sequencers are likewise connected.

FIGURE 2-22Connecting the Power Sequencers

2.5.3Connecting to AC Power Source

Each of the AC power cords connected to the expansion cabinets should be on independent circuit breakers.

To ensure proper redundancy, if independent circuit breaker boxes or AC power sources are used, power cords from the same expansion cabinet should be connected to different circuit breaker boxes or AC power sources.

Caution –You must ensure that the second rack will not lose power without the first. Data loss is likely to occur if this happens. DO NOT configure the 3x15 expansion cabinets as shown in FIGURE 2-23and FIGURE 2-24. Consult with an electrician if you do not understand the schematics in the figures.

Chapter 2 StorEdge A3500 Configurations 2-25

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Contents Sun StorEdge A3500 Hardware Configuration Guide Page Contents Iv Sun StorEdge A3500 Hardware Configuration Guide September Preface Using Unix CommandsShell Prompts Typographic ConventionsTable P-1Typographic Conventions Table P-2Shell PromptsSun Documentation on the Web Related DocumentationSun Welcomes Your Comments Table P-3Related DocumentationPage Host Connections Configuration Guidelines Single Host Supported Host ConfigurationsDaisy Chain Independent Controller Multi-Initiator 4Two-Node Multi-Initiator Configuration5AC Power Sequencers-Ultra 2 Power Connector Ultra 2 Host System-Power Connection RequirementGain access to the AC power sequencers StorEdge A3500 Configurations Rear StorEdge D1000 Disk Array SettingsOption Switch 1 1x2 ConfigurationScsi Jumper Cables and Terminators Module ID Switch1x2 Module ID Switch Settings 51x5 Option Switch Settings for StorEdge D1000 Disk Array 2 1x5 Configuration11x5 Module ID Switch Settings 82x7 Option Switch Settings for StorEdge D1000 Disk Array 3 2x7 Configuration22x7 Module ID Switch Settings 43x15 Module ID Switch Settings 4 3x15 Configuration33x15 Module ID Switch Settings 10Sun StorEdge A3500 Hardware Configuration Guide September Scsi Cabling 1x2 CablingCable Lengths 5Controller Module a11One A3000 Controller Module and Two D1000 Disk Arrays Scsi Scsi ConnectionsPower Connections 6Controller Module a 1x5 CablingDifferential Scsi terminator Scsi jumper cable Rear view R6R4 Front sequencer R1&R2 Rear sequencer L1&L2 8Controller Module B 2x7 Cabling7Controller Module a Controller Module a Controller Module B Front Sequencer Rear 3x15 Cabling 11Controller Module C Controller Module a10Controller Module B 3x15 Controller Module a Scsi Connections for Controller Module a203x15 Controller Module B Scsi Connections for Controller Module B213x15 Controller Module C Scsi Connections for Controller Module CPower Sequencer Interconnections Connecting to AC Power Source2x71x8 Phase a Power connections for the 1x8 cabinet are shown in Figure 28Sun StorEdge A3500 Hardware Configuration Guide September