Chapter 7: Environmental Requirements and Specifications
Electrical Requirements
QX and QXS Setup Guide 195
Electrical Requirements
Site Wiring and Power Requirements
Each chassis has two power supplies for redundancy. If full redundancy is required, use a separate power
source for each module.
The AC power in each power supply is auto-ranging and is automatically configured to an input voltage
range from 88 – 264 VAC with an input frequency of 47 – 63 Hz. The power supplies meet standard voltage
requirements for both U.S. and international operation. The power supplies use standard industrial wiring
with line-to-neutral or line-to-line power connections.
The 2U24/2U12 chassis and the high-density 4U56 chassis support DC power supplies as an alternative to
using AC power supplies.
Power Cable Requirements
Each power cable connects one of the power supply modules to an independent, external power source. To
ensure power redundancy, connect the two power cables to two separate circuits; for example, to one
commercial circuit and one uninterruptible power source (UPS).
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