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C H A P T E R  5
Feedback Power Wiring Configurations For the M4000 Server

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.

5.1 In a Sun Rack 1000/900

To ensure redundant power sourcing, use the recommended wiring configurations for the M4000 server in a Sun Rack 1000/900.

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 - Before using the cords that come with your Sun Rack 1000/900 with MPS units, disconnect the power strips from the MPS and connect the systems directly into the MPS using the cords. The power strips cannot be used to power any additional devices in the cabinet.


TABLE 5-1 Recommended Wiring Configurations for Six M4000 Servers With Two 30A 3-Phase MPS

Server

PSU_1

PSU_0

M4000_5

MPS_1-B5

MPS_1-A5

M4000_4

MPS_0-B4

MPS_0-A4

M4000_3

MPS_1-B3

MPS_1-A3

M4000_2

MPS_0-B2

MPS_0-A2

M4000_1

MPS_1-B1

MPS_1-A1

M4000_0

MPS_0-B0

MPS_0-A0



Note - For M4000 servers in positions 4 and 5, use power cords that are 2.5m in length to reach from the servers to the MPS units.

FIGURE 5-1 Sun Rack 1000 With Six M4000 Servers and One MPS


Figure showing Sun Rack 1000 with six M4000 servers and one MPS.


Figure Legend

1

Server 5

10

MPS_0-B

2

Server 4

11

MPS_0-A

3

Server 3

12

A2

4

Server 2

13

A1

5

Server 1

14

A0

6

Server 0

15

A5

7

MPS_0

16

A4

8

PSU_1

17

A3

9

PSU_0

18



Note - The numbering in a Sun cabinet reads from bottom to top and right to left.

5.2 In a Sun Rack II

To ensure redundant power sourcing, use the recommended power wiring configurations for the M4000 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 M4000 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 M4000 server power supplies are numbered from right to left.

 

 

FIGURE 5-2 Sun Rack II With Six M4000 Servers and Two PDUs


Figure showing Sun Rack II with six M4000 servers and two PDUs.


Figure Legend

1

PUD A

6

Group_3

2

PDU B

7

Group_4

3

Group_0

8

Group_5

4

Group_1

9

PSU_1

5

Group_2

10

PSU_2


5.3 Circuit Breaker Capacity and Characteristics

Qualified equipment cabinets 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.


Note - If the appropriate electrical receptacle is not available in your country, the connector may be removed from the cord. The cord can then be permanently connected to a dedicated branch circuit by a qualified electrician. Check local electrical codes for proper installation requirements.

5.4 Grounding

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 equipment cabinets for radiated and conducted emissions and have determined there is no difference in emissions with or without a ground strap grounding the equipment cabinets. 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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