Device Height Requirements - EMC CX3-10 Field Installation Manual

SPE3, DAE3P , and SPS operating limits

Device height requirements

Table 1
EMC Rails and Enclosures (CX3-10 Class and CX3-20 Class Storage Systems) Field Installation Guide
The ambient temperature specification is measured at the front bezel
inlet. The site must have air conditioning of the correct size and
placement to maintain the specified ambient temperature range and
offset the heat dissipation listed below.
Requirement
Ambient temperature
Temperature gradient
Relative humidity
Elevation
IMPORTANT: For systems mounted in a cabinet, the operating limits listed
above must not be exceeded inside the closed cabinet. Equipment mounted
directly above or below an SPE3 storage system must not restrict the
front-to-rear airflow of the storage system. The cooling airflow through the
storage system is approximately 64 cubic feet per minute (cfm). Cabinet
doors must not impede the front-to-rear airflow. The cabinet must exhaust air
at a rate that is equal to or greater than the sum of the exhaust rates of all the
equipment mounted in the cabinet. For example, in a cabinet containing one
SPE3 (64 cfm) and six DAE3Ps (55 cfm), the cabinet must exhaust at least
64+6x55 cfm, which equals 394 cfm.
Device height requirements and cabinet mounting measurements are
based on NEMA units (U's). See
NEMA unit heights
Number of U's
1U
2U
3U
4U
SPE3, DAE3P , and SPS operating limits
Description
10°C to 40°C (50°F to 104°F)
10°C/hr (18°F/hr)
20% to 80% noncondensing
2438 m (8,000 ft) at 40°C
3077 m (10,000 ft) at 37°C
Table 1.
Actual height
1-3/4 inches
3-1/2 inches
5-1/4 inches
7 inches
5