Chapter 7: Environmental Requirements and Specifications
Site Requirements and Guidelines
QX and QXS Setup Guide
188
Measurement
Rating for 2U12/2U24
Rating for 2U48
Rating for 4U56
Input power
requirements
100 to 240VAC, 50/60Hz,
7.2A
100 to 240VAC, 50/60Hz
200 to 240VAC, 50/60Hz
Maximum input power
475W maximum continuous
640W maximum
continuous
958W maximum
continuous
Heat dissipation
1,622 BTUs/hour
2,245 BTUs/hour
3,271 BTUs/hour
Table 62:
Power requirements - AC Input
l
All AC mains and supply conductors to power distribution boxes for the rack-mounted system must be
enclosed in a metal conduit or raceway when specified by local, national, or other applicable government
codes and regulations.
l
Ensure that the voltage and frequency of your power source match the voltage and frequency inscribed
on the equipment’s electrical rating label.
l
To ensure redundancy, provide two separate power sources for the chassis . These power sources
must be independent of each other, and each must be controlled by a separate circuit breaker at the
power distribution point.
l
The system requires voltages within minimum fluctuation. The customer-supplied facilities’ voltage must
maintain a voltage with not more than ± 5 percent fluctuation. The customer facilities must also provide
suitable surge protection.
l
Site wiring must include an earth ground connection to the AC power source. The supply conductors
and power distribution boxes (or equivalent metal chassis) must be grounded at both ends.
l
Power circuits and associated circuit breakers must provide sufficient power and overload protection. To
prevent possible damage to the AC power distribution boxes and other components in the rack, use an
external, independent power source that is isolated from large switching loads (such as air conditioning
motors, elevator motors, and factory loads).
Site Wiring and DC Power Requirements
The following are required for all installations using DC power supplies:
Measurement
Rating for 2U12/2U24
Rating for 4U56
Input power requirements
-40 to -72VDC, -48/-60V nominal
-40 to -72VDC, -48/-60V nominal
Maximum input power
475W maximum continuous
1,027W maximum continuous
Heat dissipation
1,622 BTUs/hour
3,507 BTUs/hour
Table 63:
Power requirements - DC Input
The QXS Storage system is suitable for installation as part of the Common Bonding Network (CBN). The
system’s Battery Return (BR) Input Terminals are considered to be an Isolated DC Return (DC-I).
