UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

DC-UPS WITH INTEGRATED BATTERY
■
■
■
■
■
■
■
■
■
■
■

Compact and Easy to Install
Longest Buffer Time in Class
Easy Battery Access
Stable Output Voltage in Buffer Mode
Superior Battery Management for Longest Battery Life
Temperature Compensated Battery Charging
Comprehensive Diagnostics and Monitoring Functions
Replace Battery Signal Included
Electronically Overload and Short Circuit Protected
50% Power Reserves
Selectable Buffer Time Limiter

PRODUCT DESCRIPTIONSHORT-FORM DATAThis uninterruptible power supply (UPS) controller
UBC10.241 with integrated battery is a compact
addition to standard 24V power supplies to bridge
power failures or voltage fluctuations. Expensive
downtimes, long restart cycles and loss of data can
be avoided.

Input voltage
range

The DC-UPS includes a professional battery
management system which charges and monitors
the battery to achieve the longest battery service life
as well as many diagnostic functions that ensure areliable operation of the entire system.
A unique feature of the UBC10.241 is that only one
12V battery is required to buffer the 24V output.
This makes matching batteries unnecessary andallows a precise battery charging and testing.
The UBC10.241 has one integrated 12V 5Ah highcurrent VRLA battery, which is easy to change.

nom. 24Vdc
22.5-30Vdc
Output current
min. 15A
min. 10A
Output voltage
typ. 0.23V lower
as input voltage
22.25V
Integrated battery 12V 5Ah
Temperature range 0 to 40°C
Dimensions
123x124x119mm
Buffer time
typ. 16’15”
typ. 6’15”

Buffer mode, 10A
VRLA lead acid
Operational
WxHxD
At 5A load
At 10A load

Typical setup of a DC-UPS system with the UBC10.241:
DCAC

In addition to the UBC10.241, a separate UPS
controller (UB10.241) which requires an external 12V
battery is available when a longer buffer time isrequired.

ORDER NUMBERS

Normal mode
Buffer mode
Normal mode

24V
Power
Supply24V
DC-UPS

24V
Load

e.g.:
Dimension

UBC10.241

e.g.: PLC

MAIN APPROVALS
For details and the complete approval list, see chapter 19.

DC-UPS

Accessory

UBC10.241

Standard Unit

UBC10.241-N1

Battery not assembled

UZB12.051

Battery module 12V 5Ah

UL 508

UL 60950-1

MarineMarineAug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

ATEX

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

INDEX

PAGE

1. Intended Use .......................................................3
2. Installation Instruction ........................................3
3. Input ....................................................................5
4. Output in Normal Mode .....................................6
5. Output in Buffer Mode .......................................7
6. Battery .................................................................8
7. Buffer Time ..........................................................9
8. Efficiency and Power Losses..............................10
9. Functional Diagram ...........................................10
10. Check Wiring and Battery Quality Tests...........11
11. Relay Contacts and Inhibit Input ......................12
12. Front Side and User Elements ...........................14
13. Terminals and Wiring ........................................15
14. Reliability ...........................................................15
15. EMC ....................................................................16

INDEX

PAGE

16. Environment ..................................................... 17
17. Protection Features .......................................... 17
18. Safety ................................................................ 18
19. Approved, Fulfilled or Tested Standards ......... 19
20. Regulatory Product Compliance ...................... 20
21. Physical Dimensions and Weight ..................... 21
22. Installation Notes ............................................. 22
23. Replacement of the battery ............................. 23
24. Accessories ........................................................ 24
24.1. Battery………………………….…………24
25. Application Notes…………...……………………25
25.1. Battery Replacement Intervals…………25
25.2. Parallel and Serial Use…………………..26
25.3. Using the Inhibit Input………………….27
25.4. Troubleshooting…………………………27

TERMINOLOGY AND ABREVIATIONS
DC-UPS

Uninterruptible power supply with DC-Input.

Normal mode

Describes a condition where the battery is charged, the input voltage is in range and the output isloaded within the allowed limits.

Buffer mode

Describes a condition where the input voltage is below the transfer threshold level, the unit isrunning on battery (buffering) and the output is loaded within the allowed limits.

Charging mode

Describes a condition where the battery is being charged, the input voltage is in range and theoutput is loaded within the allowed limits.

Inhibit mode
Buffer time

Describes a condition where buffering is disabled on purpose by using the inhibit input of the DCUPS. (e.g. for service actions, or to save battery capacity)
Same as the term “hold-up time”.

T.b.d.

To be defined, value or description will follow later.

DISCLAIMER
The information presented in this document is believed to be accurate and reliable and may change without notice.
Some parts of this unit are patent by PULS (US patent No 091662,063, Des. 424,529, …).
No part of this document may be reproduced or utilized in any form without permission in writing from the publisher.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

2/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for commercial use, such as in industrial
control, process control, monitoring and measurement equipment or the like. Do not use this device in equipment
where malfunction may cause severe personal injury or threaten human life.

2. INSTALLATION INSTRUCTIONWARNING

Risk of electrical shock, fire, personal injury or death.

- Turn power off before working on the device and protect against inadvertent re-powering.
- Do not open, modify or repair the device.
- Use caution to prevent any foreign objects from entering into the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on, and immediately after power-off. Hot surface may cause burns.
Obey the following installation instructions:This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to
the factory for inspection.
Turn power off and disconnect the battery fuse before working on the device.
Install the device in a cool area inside an enclosure providing protection against electrical, mechanical and fire
hazards. Ensure sufficient ventilation by following the requirements of the EN 50272-2.
Install the device onto a DIN rail according to EN 60715 with the input terminals on the top of the unit. The input canbe powered from a regulated power supply or a similar DC source. The voltage between the input and ground must
not exceed 60Vdc continuously. The ripple voltage in the low frequency range between 50Hz and 10kHz must be
negligible when used in marine applications.
The input must be powered from a PELV or SELV source or an ‘‘Isolated Secondary Circuit’’ in order to maintain a SELVor PELV output.
Use an appropriately sized 24V power supply, which can deliver the additional internal current consumption,required to charge the battery.
Use only VRLA lead acid batteries with a capacity between 4.5Ah and 6Ah.
Check for correct input and battery polarity. The device will not operate when the voltage is reversed. Make sure thatthe wiring is correct by following all local and national codes. Use appropriate copper cables that are designed for aminimum operating temperature of 60°C. Ensure that all strands of a stranded wire enter the terminal connection.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed.
The device is designed as ‘‘Class of Protection III’’ equipment according to IEC 61140.
The enclosure of the device provides a degree of protection of IP20.
A disconnecting means shall be provided for the output of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do
not cover ventilation grid!
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side.
Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded withless than 50%, the 5mm can be reduced to zero.
The device is designed for altitudes up to 6000m (19685ft).
The maximum surrounding air temperature is +40°C (+104°F). The operational temperature is the same as theambient or surrounding air temperature and is defined 2cm below the device.
Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

The device is designed to operate in areas between 5% and 95% relative humidity.
Do not install the battery fuse until the installation work is complete.
To avoid an unintended buffering event, disconnect the battery fuse or use the inhibit input.
Replacement fuses must be of the same type (ATOF® 287 030 from Littelfuse) or an UL listed fuse with the same
nominal value and characteristics.
Do not store the device at temperatures higher than 25°C or performance and lifetime may change. Before initial use,check the last charging which is marked on the battery. If it is older than 9 months, replace the battery.
Do not store batteries longer than 9 months without charging or performance and lifetime may change. Every 9months or whenever the open circuit voltage (OCV) falls below 12.6V, the battery should be charged. Apply acharging voltage of 13.8V (at 25°C) for 72 hours. Batteries with an OCV below 12V must not be charged anymore andmust be disposed.
Frequently charging below +5°C reduces the lifetime of the battery.
Do not use batteries other than the original batteries supplied by the manufacturer to avoid conflicts with agency
approvals.
CAUTION: The unit contains wet cell batteries. Ventilation of the installation room in accordance with the rules ofCanadian Electrical Code, part 1 is required if used in Canada.
Instructions for replacement and disposal of batteries:
Batteries need to be replaced periodically. The time interval depends on the ambient temperature in which thebattery is used and, on the number, and depth of discharge cycles. In a typical application it is recommended toreplace the batteries at least every 2 years. Disconnect battery fuse before replacing the batteries.
Always dispose batteries through a recycling organization. Optionally, batteries can be returned to the supplier orthe battery manufacturer. Batteries must be completely discharged before recycling.
Installation Instructions for Hazardous Location Areas
The device is suitable for use in Class I Division 2 Groups A, B, C, D locations and for use in Group II Category 3 (Zone2) environments.
Hazardous Location Classification: ATEX: EPS 15 ATEX 1 025 X, II 3G EX ec nC IIC T3 Gc

WARNINGEXPLOSION HAZARDS!

Substitution of components may impair suitability for this environment.
Do not disconnect the device, change unit settings or remove or insert the fuse unless power has been switched off orthe area is known to be non-hazardous.
A suitable enclosure must be provided for the end product which has a minimum protection of IP23 and fulfils therequirements of the EN 60079-0. Sufficient ventilation must be ensured in the final installation.
Do not use batteries other than the original batteries supplied by the manufacturer or batteries, which are approved
according to EN/ IEC 60079-7.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

4/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

3. INPUT
Input voltage
Input voltage ranges

nom.
nom.

DC 24V
22.5-30Vdc
30-35Vdc
35Vdc
0-22.5Vdc

Allowed input voltage ripplemax.

Allowed voltage between input
and earth (ground)Turn-on voltage

max.

Input current**)

typ.

1.5Vpp1Vpp
60Vdc or
42.4Vac
22.8Vdc

max.
typ.
typ.

23Vdc
120mA
1.1A

External capacitors on the input

Continuous operation, see Fig. 3-1
Temporarily allowed, no damage to the DC-UPS*)
Absolute maximum input voltage with no damage to the
DC-UPSThe 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.
Bandwidth <400Hz
Bandwidth 400Hz to 1kHz

The output does not switch on if the input voltage does
not exceed this level.
Internal current consumption
Current consumption for battery charging in constantcurrent mode at 24V input See Fig. 6-2 ***)

No limitation*) 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. 3-2. This calculation does not apply in overload situations
where the DC-UPS limits the output current, therefore see Fig. 3-3.
***) Please note: This is the input current and not the current which flows into the battery during charging. The battery current can befound in chapter 6.
Fig. 3-1 Input voltage range

VOUT

D

A

B

Fig. 3-2 Input current, definitions

C

Input
Current

OutputCurrent

VIN
0

18

22.5

30

35V

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

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

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 aresult, the output voltage drops since there is notenough current to support the load. A positiveeffect of the current limitation in switching modeis that the input current goes down despite anincrease in the output current resulting in lessstress for the supplying source.

Fig. 3-3 Input current and output voltage vs.
output current, typ. (battery fully charged)
Overload

Output Voltage

20V
10
20A
15
10

In

5
0

t
pu

Cur

ren

t

Output Current

4

0

8

12

15

20A

4. OUTPUT IN NORMAL MODE
Output voltage in normal modenom.

DC 24V

Voltage drop between input andoutput

max.

0.3V

max.
max.
nom.
nom.
min.
max.

0.45V
20mVpp
15A
360W
17.9A
21A
No limitation

Ripple and noise voltage
Output current
Output power
Short-circuit current
Capacitive and inductive loads*)

The output voltage follows the input voltage reduced by
the input to output voltage drop.
At 10A output current, see Fig. 4-1 for typical values
At 15A output current, see Fig. 4-1 for typical values
20Hz to 20MHz, 50Ohm*)
Continuously allowed
Continuously allowed
Load impedance 100mOhm, see Fig. 4-2 for typical values
Load impedance 100mOhm, see Fig. 4-2 for typical values

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. 4-1

Input to output voltage drop, typ.

Input to Output
Voltage drop

Fig. 4-2

Output voltage vs. output current innormal mode at 24V input, typ.

Output Voltage

0.4V
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0

28V
24
20
16
12
8
Output Current

0

2

4

6

8 10 12 14 16 18A

40

Output Current

0

5

10

15

20

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

25A

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

5. 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 modenom.

Transfer threshold for buffering
Ripple and noise voltage
Output current

typ.
max.
nom.

Short-circuit current

min.
max.

*)
**)

Output voltage is stabilized and independent frombattery voltage
22.45V±1%, at no load,
22.25V±1%, at 10A output current
80mV higher than the output voltage in buffer mode
20mVpp20Hz to 20MHz, 50Ohm
10A
Continuously allowed
15A< 5s with full output voltage*)
17.9A
Load impedance 100mOhm**)
21A
Load impedance 100mOhm**)
DC 24V

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 enough 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. 5-1 Buffering transition, definitions

Input
voltage

28V
24V

Fig. 5-2 Transfer behavior, typ.

Transferthresholdt
Outputvoltage
Buffer modet

Fig. 5-3 Available output current in buffer
mode

Fig. 5-4 Output voltage vs. output current in
buffer mode, typ.
Output Voltage

OutputCurrent

25V

15A

BonusPower®

B

A

20
15

D

10

10A

C

5
0

5A
Time

0
0

5 Sec.

A
B
C
D

OutputCurrent

0

5

10

15

20

25A

Continuously available
Available for 5s then auto switching to curve D
Buffering will stop after 5s
Buffering will stop after 5s

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

7/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

6. BATTERY
The required 12V VRLA battery is included with this unit. For more details on battery requirements see chapter 23.
Battery voltage
Battery voltage range

nom. DC 12V
9.0–15.0V
max.

Allowed battery capacity
Battery charging method
Battery charging current
End-of-charge-voltage (CV-mode)
Battery charging time
Battery discharging current**)

Deep discharge protection***)

35Vdc

typ.
7.4V
nom. 5Ah
CC-CV
nom. 1.5A
max. 1.7A
typ.
13.1-14V
typ.
3h*)
typ.
21A

typ.
max.

0.3A
50µA

typ.

270mA

typ.
typ.

10.5V
9.0V

Maintenance-free 12V VRLA lead acid battery.
Continuously allowed, except deep discharge
protection
Absolute maximum voltage with no damage to theunit.
Above this voltage level battery charging is possible
High-current version
Constant current, constant voltage mode
CC-mode, Independent from battery size
Corresponding 24V input current see Fig. 6-2
Automatic setting according to ambient temperature
Buffer mode, 10A output current, 11.5V on the battery
terminal of the DC-UPS, see Fig. 6-1 for otherparameters
Buffer mode, 0A output current
At no input, buffering had switched off, all LEDs areoff
At no input, buffering had switched off, yellow LED
shows “buffer time expired” (max. 15 minutes)
At 0A output current
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 high current 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. 6-2 Required input current vs. input
voltage for battery charging

Fig. 6-1 Battery discharging current
vs. output current, typ.
Battery Current

A

30A

B

C

25

Input Current

1.5A
1.25

20

Voltage on
battery terminalof the DC-UPS:
A: 10.5V
B: 11V
C: 12V15
105Output Current

0
0

2.5

5

7.5

10

1.0

max. (battery

charging curre
nt 1.7A)
typ. (battery
charging curre
nt 1.5A)

0.75
0.5
0.25

Input Voltage

012.5 15A

23

24

25

26

27

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

28V

8/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

7. BUFFER TIME
The buffer time depends on the capacity and performance of the battery as well as the load current. The diagram
below shows the typical buffer times of the standard battery.
Buffer time with 5Ah high-current battery

*)

min.
min.
typ.
typ.

13’24’’
4’54’’
16’15’’
6’15’’At 5A output current*)
At 10A output current*)
At 5A output current, see Fig. 7-1**)
At 10A output current, see Fig. 7-1**)

Minimum value includes 20% aging and requires a fully charged (min. 24h) battery.

**) Typical value includes 10% aging and requires a fully charged (min. 24h) battery.

Fig. 7-1 Buffer time vs. output current with a 5Ah high current battery
Buffer Current

10A
8
6
4

UZB12.051
12V 5Ah high current battery

20

Buffer Time (Minutes)

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Min.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

9/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

8. EFFICIENCY AND POWER LOSSES
Efficiency
Power losses

typ.
typ.
typ.
typ.

97.8%
2.9W
5.5W
5.0W

Normal mode, 10A output current, battery fully charged
Normal mode, 0A output current, battery fully charged
Normal mode, 10A output current, battery fully charged
During battery charging, 0A output current

Fig. 8-1 Efficiency at 24V, typ.

Fig. 8-2 Losses at 24V, typ.
Power losses versus output
current in normal mode

Efficiency vs. output
current in normal mode

98%
97.5
97.0
96.5
96.0
95.5
95.0
94.5

8W
7
6
5
4
3
2
1
0

Output Current

3

5

7

9

11

13

15A

Output Current

0

2.5

5

7.5

10

12.5

15A

9. FUNCTIONAL DIAGRAM
Fig. 9-1 Functional diagram

DC-UPS Control unit with integrated battery
24V
Power
Supply+Input-

Input Fuse&
ReversePolarity
Protection

Electronic
Current
Limiter*
Step-upConverter

Battery Charger&
TesterBuffered
Load-

Check Wiring LED (red)Cut-off
Relay

Buffer-time Limiter+

10s, 30s, 1m, 3m, 10m,(7) Inhibit +(8) Inhibit (1)

Fuse
*)

OutputStatus LED (green)
Diagnosis LED (yellow)
Controller

12V 5Ah battery-+(2) (3)(4) (5)(6)

Ready Buffering Replace
Contact Contact Battery
Contact

Return current protection; This feature utilizes a MOSFET instead of a diode in order to minimize the voltage drop and power
losses.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

10/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

10. CHECK WIRING AND BATTERY QUALITY TESTSThe DC-UPS is equipped with an automatic “Check Wiring” and “Battery Quality” test.
“Check Wiring” test:
Under normal circumstances, an incorrect or bad connection from the battery to the DC-UPS or a missing (or blown)
battery fuse would not be recognized by the UPS when operating in normal mode. Only when back up is required
would the unit not be able to buffer. Therefore, a “check wiring” test is included in the DC-UPS. This connection istested every 10 seconds by loading the battery and analysing the response from the battery. If the resistance is too
high, or the battery voltage is not in range, the unit displays “Check Wiring” with the red LED. At the same time thegreen “Ready” LED will turn off.
“State of Health” (SoH) test:
The battery has a limited service life and needs to be replaced in a fixed interval which is defined by the specified
service life (acc. to the Eurobat guideline), based on the surrounding temperature and the number ofcharging/discharging cycles. If the battery is used longer than the specified service life, the battery capacity will
degrade. Details can be found in chapter 25.1. SoH test can not determine a gradual loss in capacity. However, it can
detect a battery failure within the specified service life of the battery. Therefore, a SoH-test is included in the DC-UPS.
The SoH test consists of different types of tests:
During charging:
If the battery does not reach the ready status (see chapter 12) within 30h, it is considered to be defective.
The reason could be a broken cell inside the battery.
During operation:
Once the battery is fully charged, a voltage drop test and a load test is performed alternately every 8 hours.
Three of the tests must consecutively produce negative results to indicate a battery problem.
A battery problem is indicated with the yellow LED (replace battery pattern) and the relay contact “Replace Battery”.
Please note that it can take up to 50 hours until a battery problem is reported. This should avoid nuisance error
messages as any urgent battery problems will be reported by the “Check Wiring” test and create a warning signal.
The battery tests require up to 50h uninterrupted operation. Any interruptions in the normal operation of the DCUPS
may result in the “Replace Battery” test cycle to start over.
When “Replace battery” is indicated, it is recommended to replace battery as soon as possible.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

11. RELAY CONTACTS AND INHIBIT INPUTThe DC-UPS is equipped with relay contacts and signal inputs for remote monitoring and controlling of the unit.
Relay contacts:
Ready:

Contact is closed when battery is charged more than 85%, no wiring failure are recognized, input
voltage is enough and inhibit signal is not active.

Buffering:Contact is closed when unit is buffering.

Replace Battery:Contact is closed when the unit is powered from the input and the battery quality test (SOH test)
reports a negative result.

Relay contact ratings
Isolation voltage

max.
min.
max.

60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A resistive load
1mA at 5Vdc min.
500Vac, signal port to power port

Signal input:
Inhibit:

Signal voltage
Signal current
Inhibit threshold
Isolation

The inhibit input disables buffering. In normal mode, a static signal isrequired. In buffer mode, a pulse with a minimum length of 250ms isrequired to stop buffering. The inhibit is stored and can be reset bycycling the input voltage. See also section 25.1 for application notes.
max.
max.
min.
max.
nom.

7+
3mA

Inhibit
8-

5,1V

35Vdc
6mA, current limited
6Vdc, buffering is disabled above this threshold level
10Vdc
500Vac, signal port to power port

Restriction apply when using the signal and relay contacts in a Haz-Loc environment:
The Buffering, Ready and Replace Battery contact is intended to be used for a separately investigated non incentive field wiring
and/or field wiring apparatus. The DC-UPS may be located in a Class I, Division 2 (Group A, B, C or D) hazardous (classified)location. Associated apparatus must be installed in accordance with its manufacturer's control drawing and Article 504 of the
National Electrical Code (ANSI/NFPA 70) for installation in the United States, or chapter 18 of the Canadian Electrical Code for
Installations in Canada.
Selected associated apparatus must be third part listed as providing non incentive field circuits for the application, and have Voc
not exceeding Vmax, Isc not exceeding Imax.
Non associated non incentive field wiring apparatures shall not be connected in parallel unless this is permitted by the associatedno incentive field wiring apparatures approval.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

-

Input

DCUPS

+

+

Fig. 11-1 Contact control drawing for use in Haz-Loc
environments- Hazardous
Location

Output

1

Ready

2
3

Buffering
Replace
Battery+

Battery4
5
6

Non Hazardous
Location

Isc
Voc
Isc
Voc
Isc
Voc

Apparatus

Selected barriers must have entity parameters such that
Voc < V max, Isc < I max,
Ca > Ci + Ccable, La > Li + Lcable.
For Ccable and Lcable, if the capacitance per footor the inductance per foot is not known, then thefollowing values shall be used: Ccable = 60pF/footand Lcable = 0.2µH/foot.
Contact current: I max = 50mA
Contact voltage: V max. = 35V (DC or AC)
Max. associated circuit capacitance Ci = 0
Max. associated circuit inductance Li = 0
Not polarity requirement-

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

13/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

12. FRONT SIDE AND USER ELEMENTS
Main unit shown below without battery compartment.
A Power Port
Quick-connect spring-clamp terminals, connection for input voltage andoutput voltage.
B

Signal Port
Plug connector with screw terminals, inserted from the bottom.
Connections for the Ready, Buffering, Replace Battery relay contacts andfor the Inhibit input. See details in chapter 11.

C

Green Status LED
Ready: Battery is charged > 85%, no wiring failures are recognized, input
voltage is enough and inhibit signal is not active.
Charging: Battery is charging, and the battery capacity is below 85%.
Buffering: Unit is in buffer mode.
Flashing pattern of the green status LED:

D

ON
OFF

Ready

ON
OFF

Charging

ON
OFF

Buffering

Yellow Diagnosis LED
Overload: Output has switched off due to long overload in buffer modeor due to high temperatures.
Replace battery: Indicates a battery which failed the battery quality test
(SoH test). Battery should be replaced as soon as possible.
Buffer-time expired: Output has switched off due to settings of Buffertimer Limiter. This signal will be displayed for 15 minutes.
Inhibit active: Indicates that buffering is disabled due to an active inhibit
signal.
Flashing pattern of the yellow diagnostic LED:
ON
OFF

Overload

ON
OFF

Replace
BatteryON
OFF

Buffer time
expired

ON
OFF

InhibitactiveE

Red Check Wiring LED
This LED indicates a failure in the installation (e.g. too low input voltage), wiring, battery or battery fuse.

F

Buffer-time Limiter:
User accessible dial which limits the maximum buffer time in a buffer event to save battery energy. When thebattery begins to recharge after a discharging event, the process is completed much faster since only the energy
which was taken out of the battery needs to be “refilled”. The following times can be selected: 10 seconds, 30
seconds, 1 minute, 3 minutes, 10 minutes or infinity (until battery is discharged) which allows buffering until the
deep discharge protection stops buffering.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

13. TERMINALS AND WIRINGType

Solid wire
Stranded wire
AWG
FerrulesPull-out force

Tightening torque
Wire stripping length

Power terminals
Bi-stable, quick-connect springclamp terminals. IP20 Fingertouch-proof. Suitable for fieldand factory installation. Shippedin open position.
0.5-6mm2
0.5-4mm220-10AWG
Allowed, but not required
10AWG:80N, 12AWG:60N,
14AWG:50N, 16AWG:40N
according to UL486E
Not applicable
10mm / 0.4inch

Signal terminals
Plug connector with screw terminal. Finger-touch-proof
construction with captive screws for 3.5mm slottedscrewdriver. Suitable for field- and factory installation.
Shipped in open position. To meet GL requirements,
unused terminal compartments should be closed.
0.2-1.5mm2
0.2-1.5mm2
22-14AWG
Allowed, but not required
Not applicable

0.4Nm, 3.5lb.in
6mm / 0.24inch

Fig. 13-1 Spring-clamp terminals, connecting a wire

Instructions:a)

Use appropriate copper cables, that are designed
for an operating temperature of 60°Cb)

Follow national installation codes and regulations!

c)Ensure that all strands of a stranded wire enter theterminal connection!

d)

Up to two stranded wires with the same crosssection are permitted in one connection point

14. RELIABILITY
Lifetime expectancy

MTBF SN 29500, IEC 61709
MTBF MIL HDBK 217F

min.
min.
min.

137 400h> 15 years> 15 years
886 000h
1 482 000h
397 900
545 000

At 10A output current, 40°C
At 5A output current, 40°C
At 10A output current, 25°C
At 10A output current, 40°C
At 10A output current, 25°C
At 10A output current, 40°C, ground benign GB40
At 10A output current, 25°C, ground benign GB25

The Lifetime expectancy shown in the table indicates the operating hours (service life) and is determined by the
lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours.
Lifetime expectancy is calculated according to the capacitor’s manufacturer specification. The prediction model allows
a calculation of up to 15 years from date of shipment.
MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures and indicatesreliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily
represent the life of a product.
All values except battery.
Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

15. EMCThe unit is suitable for applications in industrial environment as well as in residential, commercial and light industry
environment without any restrictions. CE mark is in conformance with EMC guideline 89/336/EC and 93/68/EC and the
low-voltage directive (LVD) 73/23/EC, 93/68/EC.
A detailed EMC Report is available on request.
EMC Immunity
Electrostatic discharge

EN 61000-6-1, EN 61000-6-2
EN 61000-4-2

Electromagnetic RF field
Fast transients (Burst)

EN 61000-4-3
EN 61000-4-4

Surge voltage

EN 61000-4-5

Conducted disturbanceEN 61000-4-6

Contact discharge
Air discharge
80MHz-1GHz
Out- and input lines
Signal lines**)
Output +  Input +  + / -  housing
0,15-80MHz

Generic standards
8kV
Criterion A*)
15kV
Criterion A*)
10V/m
Criterion A
2kV
Criterion A
2kV
Criterion A
500V
Criterion A
500V
Criterion A
500V
Criterion A
10V
Criterion A*) DIN rail earthed**) Tested with coupling clamp

EMC Emission
Conducted emission

EN 61000-6-3, EN 61000-6-4
Generic standards
EN 55032
Input lines
Class B*)EN 55032
Output lines
Class B*)
Radiated emission
EN 55011, EN 55032
Class B
This device complies with FCC Part 15 rules.
Operation is subjected to the following two conditions: (1) this device may not cause harmful interference, and (2) thisdevice must accept any interference received, including interference that may cause undesired operation.
*)

Informative measurement with voltage probe

Switching frequencies
Switching frequency of boost converter
Switching frequency of electronic output current limitation
Switching frequency of battery charger

The DC-UPS has three converters with three different
switching frequencies included.
100kHzConstant frequency
78kHz
Constant frequency
19.5kHz
Constant frequency

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

16. ENVIRONMENT
Operational temperature
Storage temperature
Humidity

0°C to +40°C (32°F to 104°F)-20°C to +50°C (-4°F to 122°F)
5 to 95% r.H.

Vibration sinusoidal
Shock
AltitudeOver-voltage category

2-17.8Hz: ±1.6mm; 17.8-500Hz: 1g*)
15g 6ms, 10g 11ms*)
0 to 6000m
III
II
2

Degree of pollution*)

Full output power
Storage and transportation
IEC 60068-2-30
Do not energize while condensation is present
IEC 60068-2-6
IEC 60068-2-27
Approvals apply only up to 2000m
EN 50178
EN 50178 above 2000m altitude
EN 50178, not conductive

Use wall mounting accessory for higher values.
Fig. 16-1 Normal Mode: Output current vs.
ambient temperature

Fig. 16-2 Buffer Mode: Output current vs.
ambient temperature

Allowable Output
Current in Normal Mode

Allowable Output
Current in Buffer Mode

15A

15A

continuous

12.5
10

10

7.5

7.5

5

5

2.5
0

10

20

30

continuous

2.5

Ambient Temperature0

for typ. 5s

12.5

Ambient Temperature

0
40

50

60°C

0

10

20

30

40

50

60°C

The ambient temperature is defined 2cm below the unit.

17. PROTECTION FEATURES
Output protection
Output over-voltage protection
in buffer mode
Degree of protection
Penetration protection
Reverse battery polarity protection
Wrong battery voltage protection
Battery deep discharge protection
Over temperature protection
Input over-voltage protection
Internal input fuse

Electronically protected against overload, no-load and short-circuits
typ. 32Vdc
In case of an internal defect, a redundant circuitry
max. 35Vdc
limits the maximum output voltage. The output
automatically shuts-down and makes restart attempts.
IP20
EN/IEC 60529> 3.5mm
E.g. screws, small partsyesMax. –35Vdc;
yesMax. +35Vdc (e.g. 24V battery instead of 12V battery)yes
The limit is battery current dependentyes
Output shutdown with automatic restartyesMax. 35Vdc, no harm or defect of the unit
25A, blade type
No user accessible part, no service partAug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

17/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

18. SAFETY
Output voltage

Class of protection
Isolation resistanceDielectric strength
Touch current (leakage current)

SELV
IEC/EN 60950-1
PELV
EN 60204-1, EN 50178, IEC 60364-4-41
Max. allowed voltage between any input, output or signal pin and ground:
60Vdc or 42.4Vac
II
PE (Protective Earth) connection is not required> 5MOhm
Power port to housing, 500Vdc
500VacPower port to signal port
500VacPower port / signal port to housing
The leakage current which is produced by the DC-UPS itself depends on the input
voltage ripple and need to be investigated in the final application.
For a smooth DC input voltage, the produced leakage current is less than 100µA.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

18/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

19. APPROVED, FULFILLED OR TESTED STANDARDSUL 508

IEC 60950-1

UL 60950-1

ATEX

IECEx

Class I Div 2

Marine (DNV)

Marine (ABS)UL 1989

UL Certificate
Listed equipment for category NMTR - Industrial Control
Equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
General safety requirements for Information Technology
Equipment (ITE)UL Certificate
Recognized component for category QQGQ - Information
Technology Equipment (ITE)
Applicable for US and Canada
E-File: E137006
Agency Certificate (Bureau Veritas)
EN 60079-0 Explosive atmospheres - General requirements
EN 60079-7, EN 60079-15 Equipment protection by type ofprotection "e" and "n"Certificate: EPS 15 ATEX 1 025 X
Temperature Code: T3
Type of Protection: ec nC
IECEx Certificate
IEC 60079-0 Explosive atmospheres - General requirements
IEC 60079-7, IEC 60079-15 Equipment protection by type ofprotection "e" and "n"Certificate: IECEx EPS 15.0049X
Temperature Code: T3
Type of Protection: ec nC
UL Certificate
Recognized component for category QQPX - Power Supplies for
Use in Hazardous Locations
Applicable for US and Canada
E-File: E246847
Temperature Code: T3
Groups: A, B, C and D
DNV Certificate
DNV Type approved product
Certificate: TAA00001ST
Temperature: Class A
Humidity: Class B
Vibration: Class C
EMC: Class A
Enclosure: Class A
ABS Design Assessment Certificate
ABS (American Bureau of Shipment) assessed product
Certificate: 17-HG1599236-PD
Vendor Certificate
Standard for Standby Batteries
UL94: HB

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

19/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

IEC 60068-2-60

ISA-71.04 G3

VDMA 24364

Manufacturer's Declaration (Online Document)
Environmental Tests, Flowing Mixed Gas Corrosion Test
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, which simulates a service life of 10 years.
Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, which simulates a service life of 10 years
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1L/W for solvents and water-based paints

20. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity

REACH Directive

WEEE Directive

KC Korean Certificate

EAC TR Registration

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Statement
EU-Directive regarding the Registration, Evaluation,
Authorization and Restriction of Chemicals
Manufacturer's Statement
EU-Regulation on Waste Electrical and Electronic Equipment
Registered in Germany as business to business (B2B) products.
KC Registration
Korean registration of Broadcasting and Communication
Equipment
Registered under Clause 3, Article 58-2 of Radio Waves Act.
EAC Certificate
EAC EurAsian Conformity - Registration Russia, Kazakhstan
and Belarus
8504408200, 8504409000

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

20/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

21. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth
WeightDIN-Rail

123mm / 4.84’’
124mm / 4.88’’
Plus, height of signal connector plugs and Spare fuse
119mm / 4.69’’
Plus, depth of DIN rail
2850g / 6.28lb
Use 35mm heavy duty DIN rails according to EN 60715 or EN 50022.
The DIN rail depth must be added to the depth (119mm) to calculate the total required installation
depth.

Electronic files with mechanical data can be downloaded at www.pulspower.com
Fig. 21-1 Side viewFig. 21-2 Front view

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

21/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

22. INSTALLATION NOTESMounting:
The power terminals shall be located on top of the unit. An appropriate electrical and fire end-product enclosure
should be considered in the end use application.
Do not install unit in airtight housings or cabinets. The site in which the unit is located must have sufficientventilation acc. to EN50272-2.
Cooling: Convection cooled; no forced air cooling required. Do not obstruct air flow!
Installation clearances: 40mm on top, 20mm on the bottom, 5mm on the left and right side are recommended
when loaded permanently with full power. In case the adjacent device is a heat source, 15mm clearance arerecommended.
Risk of electrical shock, fire, personal injury or death!
Turn power off and disconnect battery fuse before working on the DC-UPS. Protect against inadvertent re-powering.
Make sure the wiring is correct by following all local and national codes. Do not open, modify or repair the unit,
except replacement of the battery. Use caution to prevent any foreign objects from entering the housing.
Do not use in wet locations or in areas where moisture or condensation can be expected.
Service parts:
The DC-UPS contains an integrated battery which must be changed on a periodic basis, see chapter 23 and. 25.1.
The tripping of an internal fuse is caused by an internal fault. If damage or malfunctioning should occur during
operation, immediately turn power off and send unit to the factory for inspection! For Troubleshooting see 25.4.
Wiring and installation instructions:(1) It is recommended to install the DC-UPS in a place where the integrated battery will not be heated up by
adjacent equipment. The unit is equipped with a fuse holder and a 30A battery fuse type ATO® 257 030 (Littlefuse). The battery fuse protects the wires between the battery and the DC-UPS. It also allows the disconnection of
the battery from the DC-UPS which is recommended when working on the battery or DC-UPS. Disconnect battery
fuse before connecting the battery.
(2) Connect the power supply to the input terminals of the DC-UPS.
(3) Connect the buffered load to the output terminals of the DC-UPS. The output is decoupled from the input
allowing load circuits to be easily split into buffered and non buffered sections. Noncritical loads can beconnected directly to the power supply and will not be buffered. The energy of the battery can then be used in
the circuits which require buffering.
(4) Plug-in the fuse when the wiring is finished.
Fig. 22-1 Typical wiring diagram
24V
unbufferedbranch24V
bufferedbranchN

24V

DC-UPSUBC10.241-

Buffered
load

-

+

+

OUT

+

-

IN

24V

24V
Power
supply-++-Unbuffered
load

L PE

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

22/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

23. REPLACEMENT OF THE BATTERY
The integrated battery should be replaced on a periodic basis, see chapter 25.1 for additional information.
The replacement should be done by qualified personnel trained on battery handling.
Caution! The terminals on the battery are always alive, therefore do not place items or tools on the battery!
How to replace the battery:

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Removethe fuse
beforeworking on
the unit.

Loosen thecaptive coverscrew.

Remove thebattery-cover.

Disconnect the cablesfrom the battery
terminals.

Remove thebattery by pullingon the strap.

Step 6:

Install the new battery.

Step 7:

Connect the red cable (+) to the red positive (+) terminal of the battery.

Step 8:Connect the black cable (-) to the black negative (-) terminal of the battery.

Step 9:Close the cover.

Step 10: Tighten the screw.
Step 11: Plug-in the fuse.
Disposal of batteries
Batteries marked with the recycling symbol should be recycled through a competent agency.

Replacement battery
See chapter 24 for information on the UZB12.051 or you can use a battery which meets the following requirements:
Battery type
Design life
Dimensions
Pole connection
Approvals
Allowed discharge current
*)

nom.
min.
nom.

min.

12V, 4 to 6Ah
3 to 5 years
70x106x90mm
6.35mm/ 0.25Inch
UL, VdS
29A

VRLA lead-acid maintenance free battery
According to EUROBAT guideline
WxHxD*)
Blade type; Fast-on
For applications which require UL or VdS
Continuous

Max. case height of 102mm

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

23/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

24. ACCESSORIES
24.1. BATTERY
The integrated battery should be replaced on a periodic basis, see chapter 25.1.
As replacement the UZB12.051 can be used.

Battery type
Design life
Dimensions
Pole connection
WeightOrder number

UZB12.051
High current version
12V, 5Ah
3 to 5 years
70x106x90mm
6.35mm/ 0.25Inch
2kg/ 4.41lb
UZB12.051

VRLA lead-acid maintenance free battery
According to EUROBAT guideline
Width x total height x depth
Blade type; Fast-on
Battery for UBC10.241

Fig. 24-1 UZB12.051

Wall mounting bracket
Type ZM1.UBC10 is under preparation, please consult PULS.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

24/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

25. APPLICATION NOTES
25.1. BATTERY REPLACEMENT INTERVALS
Batteries have a limited lifetime. They degrade slowly beginning from the production and need to be replaced
periodically. The design life figures can be found in the individual datasheets of the batteries and usually is specified
according to the Eurobat guideline or according to the manufacturer’s specifications.
The design life is the estimated life based on laboratory condition and is quoted at 20°C using the manufacturer’s
recommended float voltage condition. According to the Eurobat guideline, design lives have been structured into thefollowing different groups:
3 - 5 years:

This group of batteries is very popular in standby applications and in small emergency equipment.
This represents a 4 years design life with a production tolerance of ±1 year.
6 - 9 years:
This group of batteries is usually used when an improved life is required.
This represents a 7.5 years design life with a production tolerance of ±1.5 years.
10 - 12 years: This group of batteries is used when in applications where longest life and highest safety level are
required. This represents a 11 years design life with a production tolerance of ±1 year.
A battery failure within the specified design life of the battery usually results in a complete loss of the battery
function (broken cell, defect connection, …) and will be detected and reported by the periodical battery tests which
are included in the UBC10.241 DC-UPS control unit.
If the operational parameters differ from those which are specified for the design life, an earlier change of thebattery might be necessary. The “real life” is called service life and is defined as the point at which the cell’s actual
capacity has reached 80% of its nominal capacity. At the end of the service life the capacity degrades much faster, sothat a further use of the battery is not recommended.
Temperature effect:
The temperature has the most impact in the service life. The hotter the temperature, the earlier the wear-out phaseof the battery begins. The wear-out results in a degradation of battery capacity. See Fig. 25-1 for details.
Effect of discharging cycles
The number as well as the depth of discharging cycles is limited. A replacement of the battery might be necessary
earlier than the calculated service life if the battery exceeds the numbers and values of Fig. 25-2.
Other effects which shorten the service lifeOvercharging and deep discharging shortens the service life and should be avoided. Thanks to the single
battery concept of the UBC10.241, the end-of-charge voltage is precisely set automatically avoiding
unnecessary aging effects.

Charge retention is important to get the longest battery life. Stored batteries which are not fully charged
age faster then charged batteries. Batteries which are not in use should be recharged at least once a year.



Excessive float charge ripple across the battery has an effect of reducing life and performance. The
UBC10.241 does not produce such a ripple voltage. This effect can be ignored when the battery is charged
with the UBC10.241.

Guidelines for a long battery service life:

Place the DC-UPS in a cool location: E.g. near the bottom of the control cabinet.



Do not place the DC-UPS near heat generating devices.



Do not store discharged batteries.



Do not discharge the battery more than necessary. Set buffer time limiter to the required buffer time.
The depth of discharge reduces the service life of the battery and limits the number of cycles. See Fig. 25-2.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series

Example for calculating the service life and the required replacement cycle:
Parameters for the example:


A 5Ah battery with a design life of 3-5 years is used (e.g. Yuasa battery which is used for type UZB12.051)



The average ambient temperature is 30°C

One buffer event consumes approx. 25% of the achievable buffer time.

One buffer event per day

Calculation:
Ambient temperature influence:
According to Fig. 25-1 curve A, a 2 years service life can be expected for an ambient temperature of 30°C.
Number of discharging cycles: 2 years * 365 cycles = 730cycles in 2 years.
According to Fig. 25-2, curve C has to be used (only 25% of battery capacity is required). 730 cycles have only anegligible influence in a battery degradation and can be ignored.
Result:The battery shall be replaced after 2 years.
Please note that the battery degrading begins from the production date (check date code on the battery) which may
shorten the replacement intervals.
Fig. 25-1 Service life versus ambient
temperatures, typ *)Service Life in Years

10
9
8
7
6
5
4
3
2
1

20°C
*)

Cell Capacity
Design Lifeof Battery
A: 3-5 Years
B: 6-9 Years
C: 10-12 Years

C
B

Fig. 25-2 Cell capacity degradation vs. discharging
cycles *)

120%
C

100%
B

80%

A

60%
A

Depth ofdischarge
A: 100%
B: 50%
C: 30%

40%
20%

Number of Discharging Cycles

Ambient Temperature

25°C

30°C

35°C

40°C 45°C

0

200

400

600

800

1000 1200

datasheet figures from battery manufacturer

25.2. PARALLEL AND SERIAL USE
Do not use the DC-UPS in parallel to increase the output power. However, two units of the DC-UPS can be paralleled
for 1+1 redundancy to gain a higher system reliability.
Do not use batteries in parallel, since the battery quality test might create an error message.
Do not connect two or more units in series for higher output voltages.
Do not connect two or more units in a row to get longer hold-up times.

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

26/27

UBC10.241, UBC10.241-N1
24V, 10A, DC-UPS

U–Series25.3. USING THE INHIBIT INPUT
The inhibit input disables buffering. In normal mode, a static signal is required. In buffer mode, a pulse with aminimum length of 250ms is required to stop buffering. The inhibit is stored and can be reset by cycling the input
voltage.
For service purposes, the inhibit input can also be used to connect a service switch. Therefore, the inhibit signal canbe supplied from the output of the DC-UPS.
Fig. 25-3 Wiring example for inhibit input

N

Input
L PE

IN

24V

+-

OUT
24V

Buffered
Load

DC-UPSUBC10.241
Signal Port

InhibitPower
Supply+--Output+++ - -+-

Service
Switch

25.4. TROUBLESHOOTINGThe LEDs on the front of the unit and relay contacts indicate the status of the DC-UPS. Please see also chapter 12.
The following guidelines provide instructions for fixing the most common failures and problems. Always start withthe most likely and easiest-to-check condition. Some of the suggestions may require special safety precautions. Seenotes in chapter 22 first.
“Check wiring” LED is on

Check correct wiring between the battery and the DC-UPS
Check battery fuse. Is the battery fuse inserted or blown?
Check battery voltage (must be typically between 7.4V and 15.1V)
Check input voltage (must be typically between 22.8V and 30V)
Check battery polarity

DC-UPS did not buffer

Inhibit input was set
Battery did not have enough time to be charged and is still below the deep discharge
protection limit.

DC-UPS stopped buffering

Buffer time limiter stopped buffering  set buffer time limiter to a higher value
Deep discharge protection stopped buffering  allow enough time for charging thebattery
Output was overloaded or short circuit  reduce load

Output has shut down

Cycle the input power to reset the DC-UPS
Let DC-UPS cool down, over temperature protection might have triggered.

DC-UPS constantly switches between normal mode and buffer mode
The supplying source on the input is too small and can not deliver enough current
 Use a larger power supply or reduce the output load
The input voltage is same as transfer threshold.  Increase input voltage

Aug. 2021 / Rev. 1.5 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 deliver a sufficient output current.can
www.pulspower.com Phone +49 89 9278 0Germany

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