Product Description：
The 3500 Power Supplies are half-height modules and must be installed in the
specially designed slots on the left side of the rack. The 3500 rack can contain
one or two power supplies (any combination of ac and/or dc) and either supply
can power a full rack. If installed, the second supply acts as a backup for the
primary supply. When two power supplies are installed in a rack, the supply in
the lower slot acts as the primary supply and the supply in the upper slot acts as
the backup supply. Removing or inserting either power supply module will not
disrupt operation of the rack as long as a second power supply is installed.
