C H A P T E R  1

Sun Netra X4250 Server Site Planning

This guide provides the specifications and site requirements for planning the installation of Sun Netra X4250 server from Oracle.

For safety and compliance information, refer to the Sun Netra X4250 Server Safety and Compliance Guide, 820-4054, and the Important Safety Information for Sun Hardware Systems, 821-1590, that came with your server.

Physical Specifications

The following are the physical specifications for the server.

Dimension Server Dimensions Measurements
Width Bezel

Server chassis

17.4 in. (442.0 mm)

16.75 in. (425.5 mm)

Depth To connector plane

Maximum overall

20 in. (502 mm)

20.67 in. (525 mm)

Height 2 rack unit (2U) nominal 3.44 in. (87.4 mm)
Weight Server only 34.78 lbs (15.81 kg)

Clearance for Service Access

These are the minimum clearances needed for servicing the server.

Description Specification
Clearance, front of server 36 inches (91 cm)
Clearance, rear of server 36 inches (91 cm)

Environmental Specifications

These are the environmental specifications for the AC and DC versions of the server.

Specification Operating Nonoperating
Ambient temperature[1] 41°F to 104°F (5°C to 40°C) up to 6000 feet (1829 meters)[2] –40°F to 158°F (–40°C to 70°C)
Relative humidity 10% to 90% noncondensing, short term 25°F to 113°F (-5°C to 55°C)

5% to 90% noncondensing, but not to exceed 0.024 kg of water per kg of dry air (0.053 lbs. water/2.205 lbs. dry air)

Up to 93% noncondensing 100.4° (37.7°C) maximum wet bulb
Elevation (Sun requirement) Maximum 9840 feet (3000 meters) at 104°F (40°C) Maximum 39370 feet (12000 meters)
Elevation (NEBS requirement) -200 feet to 5900 feet (-60 meters to 1800 meters) at 104°F (40°C)

5900 feet to 13100 feet (1800 meters to 4000 meters) at 86°F (30°C)

Vibration DC servers: 0.1G, 5-100 Hz, 0.1 Oct/min

AC servers: 0.1G (x,y axes); 0.15G (z axis), 5-500 Hz, 1 Oct/min

DC servers: 0.1G, 5-100 Hz, 0.1 Oct/min

AC servers: 0.25G (x,y axes); 0.5G (z axis), 5-500 Hz, 1 Oct/min

Shock DC servers: Operating 30 m/s2, 11msec half-sine

AC servers: 3G, 11msec half-sine

DC servers: Operating 30 m/s2, 11 msec half-sine

AC servers: 1 in. roll off front to back, 0.5 in. roll off side to side, 20 mm step-up

Seismic AC server only: Zone 4 Not applicable

AC and DC Power Source Requirements

The server has two hot-swappable power supplies. Both the AC and the DC power supplies are capable of current sharing. To ensure redundant operation of the power supplies, connect the two power cords to separate circuits.

The following table shows the electrical limits and ranges for the server.

Parameter AC Version Requirement DC Version Requirement
Voltage (nominal) 100-120/200-240 VAC -48 or -60 VDC (-40 to -75 VDC range)
Input current (maximum) 8.2 A 19 A
Frequency 50/60 Hz N/A
DC Input Treatment N/A Isolated DC Return (DC-1)

Note - The DC power source must be reliably connected to ground.

Additional Power System Information

The total input power for the system is divided equally among the power supplies in operation. Reversing the positive and negative inputs to the power supplies of a DC input system will not cause damage. However, the power supplies with reversed input will not operate.

The inputs to a power supply are isolated from the system chassis and the other power supply inputs. The AC or DC power inputs may be at different voltages within the acceptable range and may have different offset voltages relative to the system chassis.

Changing Sun Servers From AC to DC Input or From DC to AC Input

Safety agency requirements prohibit Sun Microsystems from changing a product from AC input to DC input or from DC input to AC input after the product has been removed from the agency approved manufacturing site.

Agency Compliance Specifications

The server complies with the following specifications.

Category Relevant Standards
Safety UL/CSA-60950-1 EN60950-1 IEC60950-1 CB Scheme with all country deviations IEC825-1, 2 CFR21 part 1040 CNS14336, GB4943
Ergonomics EK1-ITB-2000
RFI/EMC EN55022 Class A 47 CFR 15B Class A ICES-003 Class A VCCI Class A AS/NZ 3548 Class A CNS 13438 Class A KSC 5858 Class A GB9254 Class A EN61000-3-2 GB17625.1 EN61000-3-3
Immunity EN55024 IEC 61000-4-2 IEC 61000-4-3 IEC 61000-4-4 IEC 61000-4-5 IEC 61000-4-6 IEC 61000-4-8 IEC 61000-4-11
Telecommunications EN300-386

IEC 60068

Regulatory markings (pending) CE, FCC, ICES-003, C-tick, VCCI, GOST-R, BSMI, MIC, UL/cUL, UL/DEMKO/GS, UL/S-mark, CCC

Operating Environment

Your environmental control system must provide intake air for the server which complies with the limits specified in Environmental Specifications.

To avoid overheating, do not direct warmed air:

The server has been tested to meet all functional requirements when operating in the operating environmental limits presented in Environmental Specifications. Operating computer equipment in extremes of temperature or humidity increases the failure rate of hardware components. To minimize the chance of component failure, use the server within the optimal temperature and humidity ranges.

Electrical Power

Good practice is to connect each power supply to a separate circuit, which enables the server to remain operational if one of the circuits fails. Consult your local electrical codes for any additional requirements.

Ambient Temperature

An ambient temperature range of 21°C (69.8°F) to 23°C (73.4°F) is optimal for server reliability. At 22°C (71.6°F) it is easy to maintain safe relative humidity levels. Operating in this temperature range provides a buffer if the environmental support systems fail.

Ambient Relative Humidity

Ambient relative humidity levels between 45% and 50% are the most suitable for data processing operations in order to:

Electrostatic discharge (ESD) is easily generated and less easily dissipated in areas where the relative humidity is below 35%, and becomes critical when levels drop below 30%.

Airflow Considerations

Acoustic Noise Emissions

The acoustic noise emissions on the server are as follows:

Parameter Operating Idling
Acoustic power LWAd (1B=10dB) 7.3 B 7.3 B

Declared noise emissions are in accordance with ISO 9296 standards.

Calculating Heat Dissipation

To calculate the heat generated by a server so that you can estimate the heat your cooling system must dissipate, convert the figure for the server’s power requirement from Watts to BTU/hr. A general formula for doing this is to multiply the power requirement figure in Watts by 3.412.

NEBS Level 3 Certification

Telcordia certified that the DC-powered version of the server meets NEBS Level 3 requirements per SR-3580, including the appropriate sections of GR-63-CORE (Network Equipment-Building System Requirements: Physical Protection) and GR-1089-CORE (Electromagnetic Compatibility and Electrical Safety – Generic Criteria for Network Telecommunications Equipment).

caution icon

Caution - To maintain NEBS compliance, the network management (NET MGT) Ethernet port and the RJ-45 serial management (SER MGT) port must use shielded cables, and both ends of the shield must be grounded.

1 (Table Footnote) Does not apply to removable media devices.
2 (Table Footnote) Maximum ambient operating temperature is derated by 1 degree C per 500m elevation.