Puls UBC10.241, UBC10.241-N1 Technical Data

U–Series

UBC10.241, UBC10.241-N1

24V, 10A, DC-UPS

5. INPUT

Input voltage nom. DC 24V Input voltage ranges nom. 22.5 to 30Vdc Continuous operation, see Fig. 5-1 30 to 35Vdc Temporarily allowed, no damage to the DC-UPS *)

Allowed input voltage ripple 1Vpp Bandwidth 400Hz to 1kHz

Allowed voltage between input and earth (ground)

Turn-on voltage

max. 23Vdc Input current **) typ. 120mA Internal current consumption typ. 1.1A Current consumption for battery charging in constant

External capacitors on the input

*) The DC-UPS shows “Check Wiring” with the red LED and buffering is not possible **) The total input current is the sum of the output current, the current which is required to charge the battery during the

charging process and the current which is needed to supply the DC-UPS itself. See also Fig. 5-2. This calculation does not apply in overload situations where the DC-UPS limits the output current, therefore see Fig. 5-3.

***) Please note: This is the input current and not the current which flows into the battery during charging. The battery current can

be found in chapter 8.

Fig. 5-1 Input voltage range Fig. 5-2 Input current, definitions

OUT

35Vdc Absolute maximum input voltage with no damage to the

DC-UPS

0 to 22.5Vdc The DC-UPS switches into buffer mode and delivers

output voltage from the battery if the input was above the turn-on level before and all other buffer conditions are fulfilled.

max. 1.5Vpp Bandwidth <400Hz

max. 60Vdc or

42.4Vac

typ. 22.8Vdc The output does not switch on if the input voltage does

not exceed this level.

current mode at 24V input See Fig. 8-2 ***)

No limitation

Input

Current

Output Current

18 30 35V22.50

A: Rated input voltage range B: Temp. allowed, no harm to the unit C: Absolute max. input voltage D: Buffer mode

Internal current

consumption

Current

consumption

for battery

charging

Electronic output current limitation

The DC-UPS is equipped with an electronic output current limitation. This current limitation works in a switching mode which reduces the power losses and heat generation to a minimum. As a result, the output voltage drops since there is not enough current to support the load. A positive effect of the current limitation in switching mode is that the input current goes down despite an increase in the output current resulting in less stress for the supplying source.

May. 2008 / Rev. 1.1 DS-UBC10.241-EN All parameters are specified at an input voltage of 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. It is assumed that the input power source can deliver a sufficient output current.

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Fig. 5-3 Input current and output voltage vs.

output current, typ. (battery fully charged)

20V

20A

Output Voltage

4812 20A

Overload

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U–Series

UBC10.241, UBC10.241-N1

24V, 10A, DC-UPS

6. OUTPUT IN NORMAL MODE

Output voltage in normal mode

Voltage drop between input and

output max. 0.45V At 15A output current, see Fig. 6-1 for typical values Ripple and noise voltage max. 20mVpp 20Hz to 20MHz, 50Ohm *) Output current nom. 15A Continuously allowed Output power nom. 360W Continuously allowed Short-circuit current min. 17.9A Load impedance 100mOhm, see Fig. 6-2 for typical values max. 21A Load impedance 100mOhm, see Fig. 6-2 for typical values Capacitive and inductive loads No limitation

*) This figure shows the ripple and noise voltage which is generated by the DC-UPS. The ripple and noise voltage

might be higher if the supplying source has a higher ripple and noise voltage.

Fig. 6-1 Input to output voltage drop, typ.

Input to Output Voltage drop

0.4V

0.35

0.3

0.25

0.2

0.15

0.1

0.05 0

468 121416

02 10

nom. DC 24V The output voltage follows the input voltage reduced by

the input to output voltage drop.

max. 0.3V At 10A output current, see Fig. 6-1 for typical values

Fig. 6-2 Output voltage vs. output current in

normal mode at 24V input, typ.

Output Voltage

28V

18A

4 0

0 5 10 15 20

Output Current

25A

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U–Series

UBC10.241, UBC10.241-N1

24V, 10A, DC-UPS

7. OUTPUT IN BUFFER MODE

If the input voltage falls below a certain value (transfer threshold level), the DC-UPS starts buffering without any interruption or voltage dips. Buffering is possible even if the battery is not fully charged.

Output voltage in buffer mode

Transfer threshold for buffering Ripple and noise voltage max. 20mVpp 20Hz to 20MHz, 50Ohm Output current nom. 10A Continuously allowed 15A < 5s with full output voltage *) Short-circuit current min. 17.9A Load impedance 100mOhm **) max. 21A Load impedance 100mOhm **)

*) If the output current is in the range between 10A and 15A for longer than 5s, a hardware controlled reduction of the

maximal output current to 10A occurs. If the 10A are not sufficient to maintain the 24V, buffering stops after another 5s. The buffering is possible again as soon as the input voltage recovers.

**) If the nominal output voltage cannot be maintained in buffer mode, the DC-UPS switches off after 5s to save battery

capacity.

Fig. 7-1 Buffering transition, definitions Fig. 7-2 Transfer behavior, typ.

nom. DC 24V Output voltage is stabilized and independent from

battery voltage

22.45V ±1%, at no load,

22.25V ±1%, at 10A output current typ. 80mV higher than the output voltage in buffer mode

Input voltage

28V 24V

Transfer

threshold

Output voltage

Buffer mode

Fig. 7-3 Available output current in buffer

Output Current

15A

10A

mode

BonusPower

05 Sec.

Time

Fig. 7-4 Output voltage vs. output current in

Output Voltage

25V

Continuously available

Available for 5s then auto switching to curve

Buffering will stop after 5s

buffer mode, typ.

A B

Output Current

5101520

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