nStor NexStor 4700F Series, User Manual

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Chapter 1 - Getting Started
Optional DC Hot Swappable Power Supplies
6
Power is applied to the enclosure by pressing the power supply On/Off switch to
the “On” position. A Power On LED located on each power supply will be
illuminated indicating that DC power has been applied. The front bezels’ “Power
On” LED will also be illuminated indicating that power has been applied.
If the power supply cooling fan fails, the Fault LED will illuminate and the alarm
will sound.
The power supply also has an amber general Fault LED. If you have a dual power
supply configuration and power is not applied to one of the power supplies, the
general Fault LED is illuminated.
CAUTION:
The DC system must be installed in a restricted access location, in
accordance with the intent of the National Electrical Code. A
restricted access location is defined as an area intended only for
qualified or trained personnel only. Access should be controlled by
key lock or access card.
Each power supply has a special cable connector that plugs into the face of the
power supply and mechanically connects to a DC feed system. Refer to the
Installation chapter for cabling procedures.
DC Source Site Requirements
The power feed must be electrically isolated from any AC power source, provide
a reliable connection to earth (battery room positive bus is connected to the
grounding electrode), and capable of providing up to 600 watts of continuous
power per feed pair.
Over-current Protection Requirements
Over-current protection devices must be provided as part of each equipment
rack. Circuit breakers must be located between the DC power feed source and
the power supplies (two 20 amp double-pole fast trip DC-rated circuit breakers
for each power supply).
Electrical Equipment Requirement
Voltage -36 to -72 VDC
Max. Operating Current 13.5 amp to 6.3 amps
Max. Input Surge Current 20.25 amps
4700F.book Page 6 Wednesday, April 6, 2005 11:05 AM