NonStop NS1200 Planning Guide

Maximum Rate of Change
per Hour
Recommended Range
1
Operating Range
1
Specification
6%, noncondensing40% to 50%, noncondensing15% to 80%, noncondensingHumidity
--0 to 10,000 feet (0 to 3,048
meters)
Altitude
2
1 Operating and recommended ranges refer to the ambient air temperature and humidity measured 19.7 in. (50 cm)
from the front of the air intake cooling vents.
2 For each 1000 feet (305 m) increase in altitude above 10,000 feet (up to a maximum of 15,000 feet), subtract 1.5× F
(0.83× C) from the upper limit of the operating and recommended temperature ranges.
Nonoperating Temperature, Humidity, and Altitude
• Temperature:
— Up to 72-hour storage: - 40° to 151° F (-40° to 66° C)
— Up to 6-month storage: -20° to 131° F (-29° to 55° C)
— Reasonable rate of change with noncondensing relative humidity during the transition
from warm to cold
• Relative humidity: 10% to 80%, noncondensing
• Altitude: 0 to 40,000 feet (0 to 12,192 meters)
Cooling Airflow Direction
Each enclosure includes its own forced-air cooling fans or blowers. Air flow for each enclosure
enters from the front of the modular cabinet and rack and exhausts at the rear.
Typical Acoustic Noise Emissions
70 dB(A) (sound pressure level at operator position)
Tested Electrostatic Immunity
• Contact discharge: 8 KV
• Air discharge: 20 KV
Calculating Specifications for Enclosure Combinations
Power and thermal calculations assume that each enclosure in the cabinet is fully populated.
The power and heat load is less when enclosures are not fully populated, such as a Fibre Channel
disk module with fewer disk drives.
AC current calculations assume that one PDU delivers all power. In normal operation, the power
is split equally between the two PDUs in the cabinet. However, calculate the power load to
assume delivery from only one PDU to allow the system to continue to operate if one of the two
AC power sources or PDUs fails.
NOTE: If your system includes the optional rackmounted HP R5500 XR UPS, the modular
cabinet will have one PDU located on the rear left side and four extension bars on the rear right
side. To provide redundancy, components are plugged into the left-side PDU and the extension
bars. Each extension bar is plugged into the UPS.
“Example of Cabinet Load Calculations” (page 50) lists the weight, power, and thermal
calculations for a system with:
• Four blade elements
• Two VIO enclosures
• Two Fibre channel disk modules
Calculating Specifications for Enclosure Combinations 49