Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
1. TERMINOLOGY AND ABBREVIATIONS
DC-UPS Abbreviation for Uninterruptible Power Supply system with a DC input and a DC output.
A DC-UPS utilizes batteries as back-up energy source.
Power supply mode Describes a condition where the input voltage is in the rated input voltage range and the
supplying power supply can deliver a sufficient amount of current for the DC-UPS and the
load. Additionally it is assumed that the output is loaded within the allowed limits and the
battery is charged, if necessary.
The mode can also be called “Normal mode”.
Battery mode Describes a condition where the input voltage is below the transfer threshold level, the unit
is running on batteries (buffering) and the output is loaded within the allowed limits.
The mode can also be called “Buffer mode”.
Normal mode see “Power supply mode”
Buffer mode see “Battery mode”
Inhibit mode Describes a condition where buffering is disabled on purpose (e.g. for service actions).
T.b.d. To be defined, value or description will follow later.
DC 24V A figure displayed with the AC or DC before the value represents a nominal voltage with
standard tolerances included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V).
24Vdc A figure with the unit (Vdc) at the end is a momentary figure without any additional
tolerances included.
may A key word indicating flexibility of choice with no implied preference.
shall A key word indicating a mandatory requirement.
should A key word indicating flexibility of choice with a strongly preferred implementation.
Feb. 2016 / Rev. 2.1 DS-UB20.241-EN
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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