Functional Power And Data Wiring Diagrams -1; Sun Fire 6800 System Power Wiring Diagrams - Sun Microsystems Sun Fire 6800 Manual

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A P P E N D I X
Functional Power and Data Wiring
Diagrams
This appendix provides functional power wiring diagrams of the Sun Fire 6800
system and the Sun Fire cabinet with Sun Fire 4810/4800/3800 systems and
SunStorEdge products.
A.1 Sun Fire 6800 System Power Wiring
Diagrams
The Sun Fire 6800 system is already mounted in its own exclusive cabinet. The
following diagrams show how to connect the power cables from the RTUs in the
cabinet to the system, cabinet fan trays, and various storage products.
The Sun Fire 6800 system has dual Redundant Transfer Units (RTUs) with four
Redundant Transfer Switches (RTSs). Two totally independent AC power sources are
needed for input power redundancy. The AC power sources must be derived from
independent power company utility feeds and Sun recommends that each be backed
up with an on-line UPS. The power sources are not independent if they are only
distinguished by having separate circuit breakers. One RTS hooked to an AC power
source and the second RTS hooked to a UPS that is connected to the same AC power
source is not supported because when the UPS is by-passed for maintenance both
RTSs will be hooked up to the same source. If both RTSs are hooked to one utility
feed then both lines must be backed up with on-line UPSs to ensure input power
redundancy.
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