Site Wiring And Power; Ac Power Recovery; Power Cords And Receptacles; Heat Output, Airflow, And Cooling - IBM DS5100 Installation, User's, And Maintenance Manual

Table 16. IBM System Storage DS5100 and DS5300 ac power requirements (continued)
1.
factor
2.
factor

Site wiring and power

The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the ac power source. The power supplies
operate within the range of 90 VAC to 264 VAC, at a minimum frequency of 50 Hz
and a maximum frequency of 60 Hz. The power supplies meet standard voltage
requirements for both domestic (inside USA) and international (outside USA)
operation. They use standard industrial wiring with line-to-neutral or line-to-line
power connections.
The agency ratings for the DS5100 and DS5300 is 5 amps at 100 VAC and 2.25
amps at 240 VAC. These are the overall maximum currents for this system.

AC power recovery

After normal power is restored after a total ac power failure, the DS5100 and
DS5300 performs power-up recovery procedures automatically without operator
intervention.

Power cords and receptacles

The DS5100 and DS5300 ships with the line jumper cords used to connect the
DS5100 and DS5300 to rack power distribution units (PDUs). If you need the ac
power cords to connect the DS5100 and DS5300 to wall receptacle outlets, you
must purchase the appropriate power cords for your country or region as described
in Appendix E, "Power cords," on page 237.

Heat output, airflow, and cooling

The maximum heat output of the storage subsystem is 557 watts (1905 BTU/hr).
Each storage subsystem rack-mounted unit requires an airflow of 2.5 m
per minute. The input air temperature to all rack cabinets should be in the range
10° C - 35° C (50° F - 95° F). The best practice operating temperature is 22° C (72°
F).
When rack cabinets that contain many storage subsystems are to be installed
together, the following requirements must be met to ensure that the storage
subsystems are adequately cooled:
v Air enters at the front of the rack cabinet and leaves at the back. To prevent the
v Where rack cabinets are in rows, each rack cabinet must touch the rack cabinet
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IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User's, and Maintenance Guide
Typical voltage: 120 V ac, 60 Hz, assumes 75% power-supply efficiency and 0.99 power
Typical voltage: 240 V ac, 60 Hz, assumes 75% power-supply efficiency and 0.99 power
air that is leaving the rack cabinet from entering the intake of another piece of
equipment, you must position the rack cabinets in alternate rows, back-to-back
and front-to-front. This arrangement is known as cold aisle/hot aisle and is shown
in Figure 12 on page 31.
that is next to it. This reduces the amount of hot air that can flow around from the
back of the rack into the intakes of the storage subsystems that are in that rack
cabinet. You should use Suite Attach Kits to completely seal any gaps that
remain between the rack cabinets. For details about Suite Attach Kits, contact
your marketing representative.
Low Range High Range
3 3
(87 ft. )