Sun Microsystems A3500FC Connections Between Power Sequencers, Connections to AC Power Sources

3.5.2Connections Between Power Sequencers

The front and rear power sequencers in the 2x7 expansion cabinet and the 1x8 expansion cabinet must be interconnected. Make sure an interconnect cable (part number 530-2325) is connected between the OUT on the front sequencer in the 2x7 expansion cabinet and the IN on the front sequencer in the 1x8 expansion cabinet (FIGURE 3-22). Make sure that the rear sequencers are likewise connected.

Out

In

FIGURE 3-22Connecting the Power Sequencers

3.5.3Connections to AC Power Sources

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, make sure that power cords from the same expansion cabinet are connected to different circuit breaker boxes or AC power sources.

Caution –Ensure that the second rack will not lose power before the first rack loses power. Data loss is likely to occur if this happens. Do not configure the 3x15 expansion cabinets as shown in FIGURE 3-23and FIGURE 3-24. Consult with an electrician if you do not understand the schematics in these figures.

Chapter 3 Sun StorEdge A3500/A3500FC Configurations 3-25