Grass Valley Karrera Video Production Center Installation v.4.1 - Manual (Page 59)

KARRERA — Installation & Service Manual 59
Karrera 4-RU Video Processor Frame Installation
4-RU Frame Power Supplies
The 4-RU Karrera Video Processor Frame has one power supply standard.
An additional power supply is available as an option for redundancy. It
slides into the extra power supply slot in the chassis. When equipped with
the redundant power supply option, the frame will continue to operate
without interruption should a single power supply fail.