Puls UBC10.241 DIN-Rail UPS Specification Guide

 

 

 

UBC10.241, UBC10.241-N1 

 

  U–Series 

24V, 10A, DC-UPS 

 

 

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. 

6/23 

 

8.  B

ATTERY

 

 

The required 12V VRLA battery is included with this unit. For more details on battery requirements see chapter 26. 

 Battery 

voltage 

nom.  DC 12V 

Maintenance-free 12V VRLA lead acid battery. 

 

Battery voltage range 

 

9.0 – 15.0V 

Continuously allowed, except deep discharge 
protection 

 

 

max.  35Vdc 

Absolute maximum voltage with no damage to the 
unit. 

   

typ. 

7.4V 

Above this voltage level battery charging is possible 

  Allowed battery capacity 

nom. 5Ah 

High-current 

version 

  Battery charging method 

 

CC-CV 

Constant current, constant voltage mode 

  Battery charging current  

nom.  1.5A 

CC-mode, Independent from battery size 

   

max.  1.7A 

Corresponding 24V input current see Fig. 8-2 

 End-of-charge-voltage 

(CV-mode)  typ. 

13.1 - 14V 

Automatic setting according to ambient temperature 

  Battery charging time 

typ. 3h 

*) 

 

 

Battery discharging current **) 

typ. 

21A 

Buffer mode, 10A output current, 11.5V on the battery 
terminal of the DC-UPS, see Fig. 8-1 for other 
parameters 

   

typ. 

0.3A 

Buffer mode, 0A output current 

 

 

max. 50μA 

At no input, buffering had switched off, all LEDs are 
off 

   

typ. 

270mA 

At no input, buffering had switched off, yellow LED 
shows “buffer time expired” (max. 15 minutes) 

  Deep discharge protection ***) 

typ. 

10.5V 

At 0A output current 

   

typ. 

9.0V 

At 10A output current 

*)   The charging time depends on the duration and load current of the last buffer event. The numbers in the table represent a 

fully discharged battery. A typical figure for a buffer current of 10A is 2h 20Min. for a 5Ah highcurrent battery. Above 40°C 
charging time can be longer. 

**)  The current between the battery and the DC-UPS is more than twice the output current. This is caused by boosting the 12V 

battery voltage to a 24V level.  

***) To ensure longest battery lifetime, the DC-UPS has a battery deep discharge protection feature included. The DC-UPS stops 

buffering when the voltage on the battery terminals of the DC-UPS falls below a certain value.  

 

Fig. 8-1   Battery discharging current  

Fig. 8-2   Required input current vs. input 

0

0

10

20

5

15

25

30A

2.5

7.5

10

15A

12.5

5

Voltage on
battery terminal
of the DC-UPS:
A:  10.5V
B:  11V
C:  12V

 

0

23

0.5

1.0

0.25

0.75

1.25

1.5A

24

25

26

28V

max. (battery charging

 current 1.7A)

27

typ. (battery charging c

urrent 1.5A)