UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AHU-Series

BATTERY MODULE

24V, 12Ah Battery Capacity(2x 12V Batteries in Series)
Small Mounting Footprint
2m Power Leads Included
PT1000 Sensor for Battery Module Temperature
Included
Includes a Centre-tap Terminal with Auto-resettable
Fuse
3 Year Warranty, Except for Batteries, Which Are
Considered a Service Part.

PRODUCT DESCRIPTIONSHORT-FORM DATAThe UZK24.121 battery module utilizes two nonspillable maintenance-free VRLA lead-acid batteries(connected in series), that are assembled in one packagewith all the required wiring included.

Nominal voltage
Nominal battery
capacity
Nominal battery life
Battery current

The battery module is available in two different
options. It can be ordered as UZK-module with a battery
or as UZO-module without a battery which can beinstalled at a later date to avoid outdated batteries.
The battery module also includes a sensor board, whichcontains a temperature sensor and a center-tap
connection terminal. The use of the sensor board
enables to monitor and charge the two batteries
individually and precisely, which extends the service lifeof the batteries and makes the use of matchedreplacement batteries unnecessary. The use of thesensor board is optional, the DC-UPS will also function
without the sensor board installed.

ORDER NUMBERS
Battery Module UZK24.121
UZO24.121
UZB12.121

Temperature sensor
Recommended
charging voltage

Self-discharge rate
Battery fuse
Temperature range
Size (WxHxD)
WeightDC 24V
12Ah
3 to 5 years
Max. 35A
Max. 3.5A
PT100027.8V
27.5V
27.15V
26.8V
3%/month35A

According EUROBAT
Discharging current
Charging current

At 10°C
At 20°C
At 30°C
At 40°C
At 20°C
ATOF® 287 035 fromLittelfuse-10°C to +40°C
For charging-15°C to +50°C
For discharging
203x186x124mm Discharging current
9200g / 20.3lb
For UZK24.121
800g / 1.76lb
For UZO24.121

MAIN APPROVALS
Battery module withassembled batteries
Battery module without
assembled batteries
Battery replacement
12V, 12Ah
2pcs needed for one
battery module

For details and the complete approval list, see chapter 12

UL 61010-2-201

IECEx

ATEX

Class I Div 2

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AH

U-Series

INDEXPage
1.
2.
3.
4.
5.
6.
7.
8.
9.

Intended Use .......................................................3
Instructions for Disposal of the Batteries ...........3
Instructions for Battery Storage .........................3
Installation Instructions ......................................3
Installation Instructions Hazardous Locations ...4
Instructions for Replacing Batteries ...................4
Functional Diagram .............................................5
Environment ........................................................5Sensor Board........................................................5Page
10. Terminals and Wiring ......................................... 611. Protection Features ............................................ 6
12. Approved, Fulfilled or Tested Standards ........... 7
13. Regulatory Product Compliance ........................ 7
14. Physical Dimensions and Weight ....................... 8
15. Recommendations for a Long Battery Life ....... 916. Mounting Orientations .................................... 10The 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.

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121BATTERY MODULE 24V, 12AH

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 wheremalfunction may cause severe personal injury or threaten human life

2. INSTRUCTIONS FOR DISPOSAL OF THE BATTERIES
Always dispose batteries through a recycling organization. Optionally, batteries can be returned to the supplier or thebattery manufacturer. Batteries must be completely discharged before recycling.
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 Cana

3. INSTRUCTIONS FOR BATTERY STORAGE
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 should be disposed.

4. 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 month, replace thebattery.
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.
Do not install the battery fuse until the installation work is complete.
Replacement fuses must be of the same type or an UL listed fuse with the same nominal value and characteristics.
Do not store batteries or battery modules 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 month, replace thebattery.
Do not short-circuit the battery poles or power wires and always check correct battery polarity.
Mount the device onto a flat surface. Do not install the battery module upside down.
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.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost allowed.
The enclosure of the device provides a degree of protection of IP00.
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 (+122°F). The operational temperature is the same as
the ambient or surrounding air temperature and is defined 2cm below the device. Charging is allowed up to +40°C.
Frequently charging below +5°C reduces the lifetime of the battery.
Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AHU-Series

The device is designed to operate in areas between 5% and 95% relative humidity.
Shorten the length of the (+) and (-) wires as needed between the battery module and the DC-UPS. If separate wires
are used, do not use wires smaller than 4mm2 (AWG 12). Do not use individual wires longer than 2m (7ft) to avoid
voltage drops on this connection.
Connect the sensor board to the DC-UPS by using control wires with a minimum wire size of 0.5mm2 (AWG 20).
Fig. 4-1 Wiring scheme(+)
(-)

Load
Input

OutputUZK24.121
Battery ModuleDC-UPS
X1
Data/Temp.
(11)

X2
RTN
(12)

CenterTap(13)

Battery(+)(-)

Batterywires(+)(-)

X1
Temp. RTN CenterTap(11) (12) (13)optional

5. INSTALLATION INSTRUCTIONS HAZARDOUS LOCATIONS
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 (Zone 2)
environments.
Hazardous Location classification: ATEX: EPS 15 ATEX 1 025 X, II 3G EX ec IIC T4 Gc
WARNING EXPLOSION HAZARDS!
Substitution of components may impair suitability for this environment.
Do not disconnect the unit or remove or insert the fuse or battery unless power has been switched off or the area isknown 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.

6. INSTRUCTIONS FOR REPLACING BATTERIES
Batteries 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 batteries.
Regarding disposal of used batteries see chapter 2.

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AHU-Series

7. FUNCTIONAL DIAGRAM
Fig. 7-1 Functional diagram battery module with sensor board
Fuse(+)
2m+ 12V BAT1+ 12V BAT22m(-)
AutoResettable
Fuse

X1: Center
TapTemp.
RTN

Temp.
SensorUZS24.100
Sensor board

8. ENVIRONMENT
Operational temperature *)-10°C to +40°C (14°F to 104°F)

Storage temperature-15°C to +50°C (5°F to 122°F)-20°C to +50°C (-4°F to 122°F)

Humidity

5 to 95% r.h.

Vibration sinusoidal±4mm at 16.7Hz
fixed frequency for 1hour
free fall from 20cm
onto a wooden floor
0 to 6000m (0 to 20 000ft)

ShockAltitude*)For charging
Frequently charging below +5°C (41°F) reduced
the lifetime of the battery
For discharging
For storage and transportation
Recommendation:
Do not store at temperatures higher than 25°C orperformance and lifetime may change.
IEC 60068-2-30
Do not energize while condensation is present
Vibration in vertical mounting orientationaccording to IEC/EN 61056-1
Shock with bottom down orientation according
to IEC/EN 61056-1

Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.

9. 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 use of the sensor board enables to monitor andcharge the two batteries individually and precisely,
which extends the service life of the batteries andmakes the use of matched replacement batteries unnecessary.
The use of the sensor board is optional, the DC-UPS will also function without the sensor board installed.
Jun. 2021 / Rev. 2.2 DS-UZK24.121-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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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AH

U-Series

10. TERMINALS AND WIRING
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
Type
Maximal wire size, solid wire
Maximal wire size, stranded wire
American Wire Gauge
Maximal wire diameter
Wire stripping length
Screwdriver
Recommended tightening torqueSignal and centre tap terminals
Screw terminals
1.5mm21.5mm2
AWG 26-14
1.5mm (including ferrules)
6mm / 0.25inch
Slotted 3x0.5mm
0.45Nm, 4lb.in

Instructions: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.

11. PROTECTION FEATURES
Degree of protection
Class of protection
Internal input fuse

IP 00
III35A

Isolation

1100Vac

According to EN/IEC 60529
According to EN/IEC 61140
DC-Fuse (blade type) ATOF® 287 035 from Littelfuse
Replacement fuses must be of the same type or an UL
listed fuse with the same nominal value andcharacteristics.
Isolation voltage between power to chassis

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AH

U-Series

12. APPROVED, FULFILLED OR TESTED STANDARDSIEC 61010-2-201

UL 61010-2-201

ATEXIECEx

Class I Div 2VDMA 24364

CB Scheme Certificate
Electrical Equipment for Measurement, Control and Laboratory
Use - Particular requirements for control equipment
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: E198865
Agency Certificate (Bureau Veritas)
EN 60079-0 Explosive atmosphères - General requirements
EN 60079-7 Equipment protection by type of protection "e"Certificat: EPS 15 ATEX 1 025 X
Temperature Code: T4
Type of Protection: ec
IECEx Certificate
IEC 60079-0 Explosive atmospheres - General requirements
IEC 60079-7 Equipment protection by type of protection "e"Certificate: IECEx EPS 15.0049X
Temperature Code: T4
Type of Protection: ec
CSA Certificate
Power Supplies for Hazardous Location
Applicable for Canada and US
CSA Class: 5318-01 (Canada), 5318-81 (USA)
Temperature Code: T4
Groups: A, B, C and D
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364C1-L/W for solvents and water-based paints

13. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity

REACH Directive

WEEE Directive
EAC TR Registration

The CE mark indicates conformance with the- EMC directive- ATEX 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.
EAC Certificate
EAC EurAsian Conformity - Registration Russia, Kazakhstan
and Belarus
8504408200, 8504409000

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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UZK24.121, UZO24.121
BATTERY MODULE 24V, 12AH

U-Series

14. PHYSICAL DIMENSIONS AND WEIGHT
WidthHeight
Depth
WeightBracket material

203mm / 8.0’’
186mm / 7.32’’124mm / 4.88’’9200g / 20.3lb
800g / 1.76lb
Zinc-plated steel

For UZK24.121
For UZO24.121

Fig. 14-1 Front viewFig. 14-2 Side viewAll dimensions in mm

All dimensions in mm

Fig. 14-3 Isometric viewFig. 14-4 Hole pattern for wall mountAll dimensions in mm

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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BATTERY MODULE 24V, 12AH

U-Series

15. RECOMMENDATIONS FOR A LONG BATTERY LIFE
Temperature:
The temperature has the most impact on 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. 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. 15-1 Service life (according to EUROBAT) vs.
ambient temperature, typ.

Service Life in Years

10987
65
4
3
2
1

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

CB

A

Ambient Temperature

20°C

30°C

25°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, as
well 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. 15-2 Battery degradation vs. discharging
cycles, typ.
Cell Capacity

120%

C

100%
B

80%

A

60%

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

40%
20%

Number of Discharging Cycles

0200400

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 fasterthen 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.

Jun. 2021 / Rev. 2.2 DS-UZK24.121-EN
All parameters are typical values specified at 25°C ambient temperature unless otherwise noted.
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BATTERY MODULE 24V, 12AH

U-Series

16. MOUNTING ORIENTATIONSThe standard mounting orientation is the vertical installation onto a flat surface.
Fig. 16-1 Standard mounting orientation

The following mounting orientations are also allowed:
Fig. 16-2 Allowed mounting orientation

Do not use the battery module in an upside down position:
Fig. 16-3 Forbidden mounting orientation

Jun. 2021 / Rev. 2.2 DS-UZK24.121-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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