5147-024, Esll, And Esls Storage Enclosures - IBM 8408-44E Site And Hardware Planning

1,2,3
Table 23. Electrical (continued)
Electrical characteristics
Phase
Notes:
1. The power supplies for AC or DC voltage do not change. Only the power chunnel is different. The power
chunnel uses internal cables to carry power from the rear of the system node to the power supplies that are in
the front of the system node.
2. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
3. AC and HVDC power supplies cannot be mixed in the same server or I/O drawer. IBM recommends that AC
products and HVDC products with HVDC PDUs are installed in separate racks. However, AC and HVDC
products can be supported in the same rack if all grounding (earthing) is done in accordance with the applicable
electrical code or codes. IBM provides documentation for different AC and HVDC products about the
disconnecting means for service. If a different disconnecting means is to be used for service of the equipment in
a rack with AC-powered and DC-powered products, the disconnecting means must be made clear to service.
Table 24. Environment requirements
Environment
ASHRAE class
Airflow direction
1
Temperature
Humidity range
Maximum dew point
Maximum operating
altitude
Shipping temperature
Shipping relative humidity
1. Derate maximum allowable dry-bulb temperature 1°C per 175 m above 950 m.
Table 25. Service clearances for rack-mounted expansion unit
Front
914 mm (36 in.)
Side and top clearances are optional during operation.
Safety compliance: This hardware is designed and certified to meet the following safety standards: UL
60950; CAN/CSA C22.2 No. 60950–00; EN 60950; IEC 60950 including all National Differences.

5147-024, ESLL, and ESLS storage enclosures

Hardware specifications for 5147-024, ESLL, and ESLS storage enclosures provide detailed information for
your storage enclosures, including dimensions, electrical, power, temperature, environment, and service
clearances.
16
Site and hardware planning
Recommended operating
18°C - 27°C (64°F - 80°F)
5.5°C (42°F) dew point (DP)
to 60% relative humidity
(RH) and 15°C (59°F) dew
point
Back
914 mm (36 in.)
Properties
Single
Allowable operating
A3
Front-to-back
5°C - 40°C (41°F - 104°F)
-12.0°C (10.4°F) DP and 8%
- 80% RH
24°C (75°F)
3050 m (10000 ft)
Sides
914 mm (36 in.)
Nonoperating
1°C - 60°C (34°F - 140°F)
5% - 80% RH
27°C (80°F)
-40°C to 60°C (-40°F to
140°F)
5% - 100%