7
A01-00104 Rev A
General
The Security II UPM (hereafter refered to as “UPM”) systems are the most
advanced, line interactive, true sinewave UPS products available for your
application. Each model is designed to provide total protection for your
system from a complete range of power quality problems. UPM systems will
protect your installation from normal mode voltage impulses, electrical noise,
sags, surges, brownouts, and blackouts. Each UPM contains a low imped-
ance isolation transformer, it completely eliminates common-mode (neutral-
to-ground) voltages that are a constant threat to the reliable operation of
microprocessor-based systems. When AC power is present, UPM constantly
lters and conditions the power supply. When AC power fails, the UPM uses
its internal, maintenance-free battery to supply reserved power to your com-
puter system. Regardless of whether or not commercial power is present, the
UPM is consistently on the job. Ensuring a fully conditioned, safely managed
interface between your computer system and its electrical power supply.
Figure 1 illustrates the basic operation of the UPM.
Figure 1
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