Sun Microsystems Sun StorEdge A3500FC - Manual (Page 57)

Chapter 3 Sun StorEdge A3500/A3500FC Configurations 3-25
3.5.2 Connections 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.
FIGURE 3-22 Connecting the Power Sequencers
3.5.3 Connections 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 3-23 and FIGURE 3-24 . Consult with an
electrician if you do not understand the schematics in these figures.
Out
In