Document A55-00042 Rev. I POWERVAR Mobile Power Manager
P a g e
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If there is no battery connected, or the battery is not recoverable (will
not accept charge), the MPM will provide output power only as long as
the AC input source is valid.
System Overview & Theory of Operations
System Overview
POWERVAR MPM (Mobile Power Manager) is engineered to be source of
isolated power for mobile workstations in healthcare applications that require
safe grounding and other provisions defined in IEC/UL60601-1 standards.
MPM is designed to provide hours of AC power from battery source during
equipment work shifts. When battery charge is “near empty” the MPM unit will
provide a “low fuel” alarm. When this occurs, the unit must be connected to AC
power so the battery can be recharged. The battery charger will operate
whenever the unit is connected to AC power until the battery is fully charged.
MPM vs UPM (UPS) vs Power Supply
Generally, the term
“Power Supply”
is used to describe the part of an electronic
system that converts AC power (as delivered via within-building branch circuits -
- either 120VAC or 230VAC nominal), to low voltage DC power (24VDC-5VDC)
for the internal system circuits.
Some power supplies are designed as “universal” power supplies to operate in
either North American (120V-208V/60Hz) or European (230V/50Hz) AC power
environments. Universal power supplies are designed to provide a steady source
of regulated DC output power across a wide range of AC input voltages, typically
from 100VAC to 240VAC. Power supplies that are not Universal, typically have
narrower operating windows around either 110-120VAC or 208-240VAC
nominal voltages. When the AC source falls outside the design operating range,
a power supply is not able to provide steady DC output power.
A
UPM/UPS
(Uninterruptible Power Manager, or Uninterruptible Power
Supply), is designed to provide a managed source of “within range” AC power
to the system when the building VAC supply falls outside the operating range of
the power supply. Depending on design, UPM units will use magnetic or
electronic components as a first line method to compensate for out-of-range
input voltage.
A UPM will provide 5 minutes to 8 hours of “emergency” AC power from battery
as the secondary source depending on the size of the battery included in the
UPM.
Summary of Contents for MPM
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