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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 AC 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
v Circuit overloading – Power circuits and associated circuit breakers must provide
v Power failures – If a total power failure occurs, the unit automatically performs a
Table 14. DS4200 Express AC power requirements
Nominal Voltage
Frequency (Hertz)
Idle Current
Maximum Operating Current
Maximum Surge Current
a.
factor
b.
factor
c.
mode.
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 DS4200 Express Storage Subsystem are 6 amps at 100
VAC and 2.5 amps at 240 VAC. These are the overall maximum operating currents
for this system.
the AC power source.
Note: Protective ground is also known as safety ground or chassis ground.
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).
power-up recovery sequence without operator intervention after power is
restored.
Typical voltage: 115 V AC, 60 Hz, assumes 73% power-supply efficiency and 0.99 power
Typical voltage: 230 V AC, 60 Hz, assumes 73% power-supply efficiency and 0.99 power
The higher number in this range applies when all of the drives are placed in Selfseek
Low Range
90 to 136 VAC
50 to 60 Hz
a
3.86 A
a c
4 A/4.54 A
a
5.04 A
High Range
198 to 264 VAC
50 to 60 Hz
b
2.05 A
b c
2.12 A/2.41 A
b
2.67 A
Chapter 1. Introduction
19
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