Table 10. DS5020 power and heat dissipation
Parameter KVA Watts (ac) Btu per hour
DS5020 0.496 447 1529
Shock and vibration requirements
Operational shock and operational vibration requirements are shown in this section.
Operational Shock: The DS5020 will be able to withstand the following shock.
Subjecting the equipment to a single shock pulse with the following characteristics
will simulate this level of shock:
v Velocity change = 20 inches per second
v Wave form = Triangular, 10g @3.75 ms
Operational Vibration (Random): While in its normal operating position, the
DS5020 will continue operating when subjected to a random vibration test using the
criteria shown in Table 11. This test uses the indicated spectral power density for 30
minutes in each of the three axes.
Table 11. Random vibration power spectral density
Hz 5 17 45 48 62 65 150 200 500
g
2
/Hz 2.0x10-7
-7
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
2.2x10
-5
Acoustic noise
Table 12 lists the maximum sound levels emitted by the storage subsystem.
Table 12. DS5020 sound levels
Measurement Level
Sound power (normal operation) 6.4 bels
Sound pressure (normal operation) 68 dBA
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.
Electrical requirements
This section provides information regarding site power and wiring, storage
subsystem power requirements, and power cord routing instructions.
Consider the following information when preparing the installation site:
v Protective 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.
v Circuit 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).
Chapter 1. Introduction 25
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