Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
Input voltage nom. DC 24V
-±25%
Input voltage range nom. 18-30Vdc Control functions such as LEDs, monitoring features,
relay contacts, etc. are working. The unit can either be
in power supply mode or in battery mode. See Fig. 4-2.
max. 30-35Vdc Temporarily allowed, no damage to the DC-UPS.
The red error LED will report “Input Voltage”, charging
and buffering are not possible. See Fig. 4-2.
max. 35Vdc Absolute max. voltage with no damage to the unit.
Normal operating input voltage
ranges
typ.
typ.
typ.
typ.
23.5 – 30Vdc
25 – 30Vdc
26 – 30Vdc
27 – 30Vdc
Ranges, where the unit does not switch to battery
mode. See Fig. 4-2.
Range A for a 22.5V buffer voltage setting
Range B for a 24V buffer voltage setting
Range C for a 25V buffer voltage setting
Range D for a 26V buffer voltage setting
Please note: The lower end must be at least 1V higher
than buffer voltages settings.
Transfer voltage for switching
into battery mode
typ.
typ.
typ.
typ.
23.5Vdc
25Vdc
26Vdc
27Vdc
Range A, 22.5V buffer voltage
Range B, 24V buffer voltage
Range C, 25V buffer voltage
Range D, 26V buffer voltage
Output voltage
in power supply mode typ. 0.12V less than
input voltage
at 20A
The output voltage is always slightly lower than the
input voltage, independent of the value of the input
voltage. See Fig. 4-4 and Fig. 4-5.
in battery mode nom.
nom.
nom.
nom.
22.5Vdc
±3%
24.0Vdc
±3%
25.0Vdc
±3%
26.0Vdc
±3%
The buffer voltage is the output voltage in battery
mode, selectable in four steps via rotary switch on the
front of the unit and will not change as the batteries
discharge. See Fig. 4-2.
Ripple and noise voltage
in power supply mode
in battery mode max.
not applicable
120mVpp
better as the supplying power supply (filter included)
20Hz to 20MHz, 50Ohm
Requirements for the power
supply on the input
- Use an appropriately sized 24V power supply, which can deliver the
additional required internal current consumption of the DC-UPS and the
required current for charging the batteries. See also Fig. 4-6.
- Use power supplies that do not deliver more than 28A continuous
output current
1)
.
Input current
internal consumption
typ. 80mA When batteries are fully charged
max.
max.
2.1A / 4.0A
2.3A / 4.3A
For <10Ah / >10Ah settings; during battery charging,
no temperature sensor installed
For <10Ah / >10Ah settings; during battery charging,
temperature sensor is installed
total input current max. Sum of the output (load) current and the internal current consumption
Footnotes can be found on the next page.
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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