UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

BATTERY MODULE

PRODUCT DESCRIPTION

24V, 12Ah battery capacity (2x 12V batteries in series)
Small mounting footprint
1.5m power leads included
PT1000 sensor for battery module temperatureincluded
Includes a centre-tap terminal with auto-resettable fuse
3 year warranty (except for batteries which areconsidered a service part)

SHORT-FORM DATAThe UZK24.122 battery module utilizes two non-spillable
maintenance-free VRLA lead-acid batteries (connected in series)that are assembled in one package with all the required wiringincluded.
The UZK24.122 comes with the sensor board UZS24.100 whichcontains a temperature sensor and a center-tap connection
terminal. The sensor board enables to monitor and charge thetwo batteries individually and precisely, extending the service
life of the batteries and making matching of replacement
batteries unnecessary. Usage of the sensor board is optional, theDC-UPS will also function without the sensor board installed.
The battery module is available in two different options. It canbe ordered as UZK-module with batteries or as UZO-module
without batteries, so these can be procured separately andinstalled at a later date to avoid outdated batteries.

Battery type
Battery life

VRLA
3 to 5 years

Battery voltage
Battery capacity
Battery current

DC 24V
12Ah
Max. 40A
Max. 4A
Max. 3.5A
27.8V
27.5V
27.15V
26.8V
3%/month
2* 35A

Recommendedcharging voltage

Self-discharge rate
Battery fuse
Temperature sensor
Temperature range

Size (WxHxD)
WeightORDER NUMBERS

PT1000-10°C to +40°C-15°C to +50°C-20°C to +50°C
203x186x125mm
9400g
900g

Nominal, acc.
EUROBAT
NominalNominalDischarging current
Charging current
Centre Tap current
At +10°C
At +20°C
At +30°C
At +40°C
At +20°C
ATOF® 287 035
from Littelfuse
For charging
For discharging
For storage
UZK24.122
UZO24.122

MAIN APPROVALSUZK24.122

Battery module with batteries

UZO24.122

Battery module without batteries

UZB12.121

Battery replacement 12V, 12Ah, 2pcs
needed for one battery module

For details and the complete approval list, see chapter 11.

ATEX(planned)

UL 508IECEx(planned)

Class I Div 2(planned)

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

INDEX
Page
1.
2.
3.
4.
5.
6.
7.
8.
9.

Intended Use .......................................................3
Installation Instructions ......................................3
Instructions for Battery Storage .........................3
Instructions for Replacing Batteries ...................4
Instructions for Disposal of the Batteries...........4
Functional Diagram.............................................4Environment ........................................................5Sensor Board........................................................6Terminals and Wiring..........................................6Page
10. Protection Features ............................................ 6
11. Approved, Fulfilled or Tested Standards........... 7
12. Regulatory Product Compliance ........................ 813. Physical Dimensions and Weight ....................... 9
14. Recommendations for a Long Battery Life ..... 1015. Mounting Orientations .................................... 11

The information given in this document is correct to the best of our knowledge and experience at the time ofpublication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of theword. As the state of our knowledge and experience is constantly changing, the information in this data sheet issubject to revision. We therefore kindly ask you to always use the latest issue of this document (available underwww.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.

WARNING

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

- Turn power off before working on the device. Protect against inadvertent re-powering.
- Do not modify or repair the unit.
- 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.
- Do not touch during power-on, and immediately after power-off. Hot surfaces may cause burns.

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

1. INTENDED USEThis module is designed for installation in an enclosure and is intended for the general professional use such as inindustrial control, office, communication, and instrumentation equipment.
Do not use this module in equipment, where malfunction may cause severe personal injury or threaten human life.

2. INSTALLATION INSTRUCTIONSThis device may only be installed and put into operation by qualified personnel.
Before initial use, check the last charging which is marked on the battery. If it is older than 9 months, replace thebattery.
Do not install the battery fuse until the installation work is complete.
This device does not contain serviceable parts, except the fuse or replacement battery. If malfunction should occur
during installation or operation, first check the fuse and battery for proper functionality. If the unit is damaged or if
the malfunction continues, immediately turn power off and send device to the factory for inspection.
Replacement fuses must be of the same type or an UL listed fuse with the same nominal value and characteristics.
Do not short-circuit the battery poles or power wires and always check correct battery polarity.
Mount the device on a flat surface.
Do not install the battery module upside down.
Place the battery module in a cool area inside a cabinet.
Shorten the (+) and (-) wires as needed for the DC-UPS between the battery module and the DC-UPS. If separate wires
are used, do not use wires smaller than 6mm2 (10 AWG).
Connect the sensor board to the DC-UPS by using control wires with a minimum wire size of 0.5mm2 / 20AWG.
Install the device in an enclosure providing protection against electrical, mechanical and fire hazards. Ensure sufficientventilation by following the requirements of the EN 50272-2.
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.
The battery module is for use in a controlled environment. Do not use the device in pollution degree 3 areas without
additional protection or in applications where a degree of protection better than IP00 is required.
Do not use batteries other than the original batteries supplied by the manufacturer to avoid conflicts with agency
approvals.
The maximum surrounding air temperature is +50°C. The operational temperature is the same as the ambient orsurrounding air temperature and is defined as the air temperature 2cm below the device.

3. INSTRUCTIONS FOR BATTERY STORAGE
Do not store batteries or battery modules at temperatures higher than 25°C or performance and lifetime may change.
Do not store discharged batteries. Keep batteries fully charged!
Charge retention is important to get the longest battery life. Stored batteries which are not fully charged age fasterthan charged batteries.
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 25.2V, the battery module should be charged. Apply acharging voltage of 27.6V (at 25°C) for 72 hours. Batteries with an OCV below 24V must not be charged anymore andmust be disposed.

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

4. INSTRUCTIONS FOR REPLACING BATTERIESBatteries need to be replaced periodically. The time interval depends on the ambient temperature in which the battery
is used and, on the number, and depth of discharge cycles. In a typical application it is recommended to replace thebatteries at least every 2 years.
Disconnect battery fuse before replacing the battery.
Regarding disposal of used batteries see chapter 5.

5. INSTRUCTIONS FOR DISPOSAL OF THE BATTERIES
Batteries must be completely discharged before replacement and can be returned to the supplier of the battery
module or the battery manufacturer for disposal.
Always dispose batteries through a recycling organization.

6. FUNCTIONAL DIAGRAMUZK24.122
Fuse(+)
1.5m+ 12V BAT1+ 12V BAT2

1.5m(-)
Auto
Resettable
Fuse

X1: Center
Tap

Temp.
RTN

Temp.
SensorUZS24.100
Sensor board

(+)
(-)

LoadInput

OutputUZK24.122
Battery Module

DC-UPS
X1
Data/Temp.
(11)

X2
RTN
(12)

CenterTap(13)

Battery(+)(-)

Batterywires(+)(-)

X1
Temp. RTN Center
Tap(11) (12) (13)optionalMrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

4/11

UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

7. ENVIRONMENT
Operational temperature *)For charging
Frequently charging below +5°C reduced thelifetime of the battery
For discharging-10°C to +40°C-15°C to +50°C
Storage temperature-20°C to +50°C

For storage and transportation
Recommendation:
For best performance and lifetime do not store
at temperatures higher than 25°C.

Humidity

5 to 95% r.h.

IEC 60068-2-30
Do not energize while condensation is present

Vibration sinusoidal±4mm at 16.7Hz
fixed frequency for 1hour

Vibration in vertical mounting orientationaccording to IEC/EN 61056-1

Shockfree fall from 20cm
onto a wooden floor

Shock with bottom down orientationaccording to IEC/EN 61056-1

Altitude

0 to 6000m

Degree of pollution

2*)

According to IEC 62477-1, not conductive

Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.
Fig. 7-1 Temperature Effects in Relation to Battery Capacity

Percent age of capacit y available
120%
100806040200-20°
-4°

-10°
14°

0°
32°

10°
50°

20°
68°

30°
86°

40°
104°

50° C122° FTemperat ure

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40AU-Series

8. SENSOR BOARD
The battery module includes a monitoring andprotection board. This board contains a temperature
sensor and a center-tap connection with an autoresettable fuse to protect the center-tap wire between
the battery module and the DC-UPS control unit.
The sensor board enables to monitor and charge thetwo batteries individually and precisely, extending theservice life of the batteries and making matching ofreplacement batteries unnecessary.
Usage of the sensor board is optional, the DC-UPS will
also function without the sensor board installed.

9. TERMINALS AND WIRING
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
Signal and center tap terminals
Type

Screw terminals

Maximal wire size, solid wire

1.5mm2

Maximal wire size, stranded wire

1.5mm2

American Wire Gauge

AWG 26-14

Maximal wire diameter

1.5mm (including ferrules)

Wire stripping length

5mmScrewdriver

Slotted 3x0.5mm

Recommended tightening torque

0.45NmInstructions:a)
Follow national installation codes and installation regulations!
b)
Ensure that all strands of a stranded wire enter the terminal connection!
c)Unused terminal compartments should be securely tightened.
d)Ferrules are allowed.

10. PROTECTION FEATURES
Degree of protection

IP00

According to EN/IEC 60529

Class of protection

III

According to EN/IEC 61140

Internal input fuse

2*35A

DC-Fuse (blade type) ATOF® 287 035 from Little fuse
Replacement fuses must be of the same type or an UL
listed fuse with the same nominal value andcharacteristics.

Isolation

1100Vac

Isolation voltage between power to chassis

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany6/11

UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

11. APPROVED, FULFILLED OR TESTED STANDARDSUL 508UL Certificate
Listed equipment for category NMTR - Industrial Control
Equipment
Applicable for US and Canada
E-File: E198865

UL 61010-2-201(only UZO24.122)

UL Certificate
Listed equipment for category NMTR - Electrical Equipment for
Measurement, Control and Laboratory Use - Particularrequirements for control equipment
Applicable for US and Canada
E-File: E198865IEC 61010-2-201

CB Scheme Certificate
Electrical Equipment for Measurement, Control and Laboratory
Use - Particular requirements for control equipment

ATEX(planned)

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: t.b.d
Temperature Code: t.b.dType of Protection: t.b.dIECEx(planned)

IECEx Certificate
IEC 60079-0 Explosive atmospheres - General requirements
IEC 60079-7, IEC 60079-15 Equipment protection by type ofprotection "e" and "n"Certificate: t.b.d.
Temperature Code: t.b.dType of Protection: t.b.dClass I Div 2(planned)

UL Certificate
Listed equipment for category NRAD - Listed equipment Industrial
Control Equipment for Use in Hazardous Locations
Applicable for US and Canada
E-File: t.b.d.
Temperature Code: t.b.dGroups: t.b.d

Labs

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

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

7/11

UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

12. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity
REACH Regulation (EU)Battery Directive (EU)
(only UZB12.121)

WEEE Regulation(only UZO24.122)

The CE mark indicates conformance with the- EMC directive- RoHS directive
Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation,Authorisation and Restriction of Chemicals (REACH) fulfilled.
EU Regulation (EC) 1907/2006.
Battery recycling marking indicates conformity with with
European Directive on batteries and accumulators and waste
batteries and accumulators.
Batteries which are brought to the market by PULS are registered
within Germany in the register of the responsible authority.
For information on battery registration in other EU countries,
please contact the local PULS sales office.
The battery must be recycled at the end of life in accordancewith local and national laws and regulations.
PULS brand EEE recycling marking indicates the conformity with
European Regulation on Waste Electrical and ElectronicEquipment (WEEE)
PULS brand EEE are registered within Germany in the register ofthe responsible authority as business to business (B2B) units.
For information on EEE registration in other EU countries, pleasecontact the local PULS sales office.
PULS brand EEE must be recycled at the end of life in accordancewith local and national laws and regulations.

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany8/11

UZK24.122, UZO24.122BATTERY MODULE 24V, 12AH, 40A

U-Series

13. PHYSICAL DIMENSIONS AND WEIGHT
Width203mm

Height186mm

Depth

125mm

Weight9400g

UZK24.122

900g

UZO24.122

Bracket material

Zinc-plated steel

Fig. 13-1 Front viewFig. 13-2 Side viewAll dimensions in mm

Fig. 13-3 Isometric viewFig. 13-4 Hole pattern for wall mountAll dimensions in mm

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany9/11

UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

14. RECOMMENDATIONS FOR A LONG BATTERY LIFE
Temperature:
The temperature has the most impact on the service life. The higher the temperature, the earlier the wear-out phaseof the battery begins. The wear-out results in a degradation of battery capacity. Place the battery module in a cool
location, e.g. near the bottom of the control cabinet. Do not place the battery module near heat generating devices.
Do not overcharge batteries!
Fig. 14-1 Service life (according to EUROBAT) vs.
ambient temperature, typ.

Service Life in Years

10987654321Design Lifeof Battery
A: 3-5 Years
B: 6-9 Years
C: 10-12 Years

CB

A

Ambient Temperature

20°C

30°C25°C

35°C

40°C 45°C

Number of discharge cycles and depth of discharge:
Do not discharge batteries more than necessary. Set buffer time limiter to the required buffer time. The number, aswell as the depth of discharging cycles is limited. A replacement of the battery might be necessary earlier.
When choosing the battery capacity, always try to get the next higher capacity than required. The depth of discharge
reduces the service life of the battery and limits the number of cycles.
Fig. 14-2 Battery degradation vs. discharging
cycles, typ.

Cell Capacity

120%

C100%
B

80%

A60%

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

40%
20%

Number of Discharging Cycles

0200

400

600

800

1000 1200

Store batteries fully charged
Do not store discharged batteries. Keep batteries fully charged!
Charge retention is important to get the longest battery life. Stored batteries which are not fully charged age fasterthan charged batteries. Batteries which are not in use should be recharged at least once a year. The higher theambient temperature, the shorter the charging interval. At storage temperatures higher than 30°C, recharging should
be done at least every nine months.

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

10/11

UZK24.122, UZO24.122
BATTERY MODULE 24V, 12AH, 40A

U-Series

15. MOUNTING ORIENTATIONSThe standard mounting orientation is the vertical installation onto a flat surface.
Fig. 15-1 Standard mounting orientation

The following mounting orientations are also allowed:
Fig. 15-2 Allowed mounting orientation

Do not use the battery module in an upside-down position:
Fig. 15-3 Forbidden mounting orientation

Mrz. 2023 / Rev. 1.0 DS-UZK24.122-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

11/11