IBM DS3200 Storage Subsystem manual Temperature and humidity, Electrical requirements

Table 3. DS3200 weights (continued)

DS3200

Weight

Maximum 1 Empty 2

1Chassis with all components and 12 hard disk drives.

2Chassis without components and hard disk drives but with front cage frame, midplane, and hard disk drive filler panels.

Table 4. DS3200 component weights

Unit	Weight
Hard disk drive	0.95 kg (2.10 lb)
Power supply with fan	2.52 kg (5.55 lb)
Controller (including cache battery backup	1.75 kg (3.85 lb)
and host port adapter)
Battery	0.22 kg (0.49 lb)

Temperature and humidity

Table 1 on page 4 lists the acceptable temperature and humidity ranges in which the storage subsystem is designed to operate.

Notes:

1.The non-operating environment must not exceed the operating environment limits for longer than 60 days.

2.The storage environment must not exceed the operating environment limits for longer than 1 year.

3.Substantial deviations from the suggested operating range, in either direction, if sustained for extended periods of time, will expose the unit to greater risk of failure from external causes.

Electrical requirements

Consider the following information when you prepare the installation site:

vProtective ground: Site wiring must include a protective ground connection to the ac power source.

Note: Protective ground is also known as safety ground or chassis ground.

vCircuit overloading: Power circuits and associated circuit breakers must provide sufficient power and overload protection. To prevent possible damage to the unit, isolate its power source from large switching loads (such as air conditioning motors, elevator motors, and factory loads).

vPower failures: If a total power failure occurs, the unit automatically performs a power-on recovery sequence without operator intervention after power is restored.

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 V ac to 264 V ac, at a minimum frequency of 50 Hz and a maximum frequency of 60 Hz. The power supplies meet standard voltage requirements for operation both inside the U.S.A. and outside the U.S.A. They use standard industrial wiring with line-to-neutral or line-to-line power connections.

14System Storage DS3200 Storage Subsystem: Installation, User’s, and Maintenance Guide