C H A P T E R 7 |
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This chapter describes your server’s input power sources.
The following topics are in this chapter:
To prevent catastrophic failures, the design of your input power sources must ensure that adequate power is provided to your midrange servers. Use dedicated AC breaker panels for all power circuits that supply power to your server. Electrical work and installations must comply with applicable local, state, or national electrical codes.
To ensure redundant power sourcing, use the recommended wiring configurations for the M5000 server in a Sun Rack 1000/900 38/42.
The Sun Rack 1000/900 can fit up to two modular power supplies (MPS). Each MPS is two rack units (U) tall. The MPS must be installed in the bottom of the cabinet.
Note - The numbering in a Sun rack reads from bottom to top and right to left. |
FIGURE 7-1 Sun Rack 1000 With Three M5000 Servers and Two MPS
To ensure redundant power sourcing, use the recommended power wiring configurations for the M5000 server in a Sun Rack II.
Sun supports up to two PDUs in a Sun Rack II cabinet, one on either side. Sun SPARC Enterprise M5000 servers can use PDU types 15k, 25k, or 35k.
For more information on PDUs in a Run Rack II, refer to the Sun Rack II User’s Guide.
Note - The PDU numbering in the Sun Rack II reads from the left side, bottom to top and the right side, top to bottom. The M5000 server power supplies are numbered from right to left. |
FIGURE 7-2 Sun Rack II With Three M5000 Servers and Two PDUs
Qualified racks housing these midrange servers require their own customer-supplied circuit breaker and AC receptacle for each power cord. Provide a stable power source, such as an uninterruptible power system (UPS), to reduce the possibility of component failures. If the computer equipment is subjected to repeated power interruptions and fluctuations, it is susceptible to a higher component failure rate than it would be with a stable power source.
Both midrange servers are shipped with grounding-type (three-wire) power cords. Always connect the cords into grounded power outlets. Each power cord will also supply your server with proper earth ground. Sun has tested the racks for radiated and conducted emissions and have determined there is no difference in emissions with or without a ground strap grounding the racks. No additional earth grounding is necessary but it may be added if desired.
Contact your facilities manager or a qualified electrician to determine what type of power is supplied to your building.
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