UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AHU-Series

BATTERY MODULELong Life Battery: 10 to 12 Years According toEUROBATSmall Mounting Footprint
Easy Access to the Terminals and the Fuse
Heavy Duty Fuse Holder and Spare Fuse Included
3 Year Warranty, Except for Batteries, Which Are
Considered a Service Part.

-PRODUCT DESCRIPTIONSHORT-FORM DATAThe UZK12.261 battery module utilizes one nonspillable maintenance-free VRLA lead-acid battery,which is assembled in a package with all wiring andfusing included.

Nominal voltage
Nominal batterycapacity
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or as UZO-module without a battery which can beinstalled at a later date to avoid outdated batteries.

Recommendedcharging voltage

Self-discharge rate
Battery fuse
Temperature range
Size (WxHxD)
WeightORDER NUMBERS
Battery Module UZK12.261
UZO12.26
UZB12.261

DC 12V26Ah
10 to 12 years
Max. 30A
Max. 5.5A
13.9V
13.75V
13.6V
13.45V
3%/month30A

According EUROBAT
Discharging current
Charging current
At 10°C
At 20°C
At 30°C
At 40°C
At 20°C
ATOF® 287 030 fromLittelfuse.
For charging
For discharging-10°C to +50°C-15°C to +60°C
214x179x153mm
10.1kg / 22.3lb
For UZK12.261
700g / 1.54lb
For UZO12.26

MAIN APPROVALS
Battery module withassembled batteries
Battery module without
assembled batteries

For details and the complete approval list, see chapter 10UL 61010-2-201

IECEx

MarineMarine

ATEX

Battery replacement
12V, 26Ah

Jun. 2021 / Rev. 2.4 DS-UZK12.261
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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BATTERY MODULE 12V, 26AH

U-Series

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

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 ...................5
Environment ........................................................5
Terminals and Wiring ..........................................6Page
9. Protection Features ............................................ 6
10. Approved, Fulfilled or Tested Standards ........... 7
11. Regulatory Product Compliance ........................ 8
12. Physical Dimensions and Weight ....................... 913. Recommendations for a Long Battery Life ..... 10
14. Mounting Orientations .................................... 11The 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. 2.4 DS-UZK12.261
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AHU-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. 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 Canada.

3. INSTRUCTIONS FOR BATTERY STORAGE
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 months, replace thebattery.
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 module should be charged. Apply acharging voltage of 13.8V (at 25°C) for 72 hours. Batteries with an OCV below 12V should be disposed.

4. INSTALLATION INSTRUCTIONSThis device may only be installed and put into operation by qualified personnel.
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 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 +60°C (+140°F). The operational temperature is the same as the ambientor surrounding air temperature and is defined 2cm below the device. Charging is allowed up to +50°C.
Frequently charging below +5°C reduces the lifetime of the battery.
Jun. 2021 / Rev. 2.4 DS-UZK12.261
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

The device is designed to operate in areas between 5% and 95% relative humidity.
Fig. 4-1 Wiring schemePowerSupplyLoad+ Input+ Output

Battery
Module(+)

DC-UPS

Fuse+ 12V -Battery +-(-)

BATTERYUZK12.261

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.

Jun. 2021 / Rev. 2.4 DS-UZK12.261
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

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 5 years. Disconnect battery fuse before replacing the batteries. Do not over-tighten screws of
the terminal bolts of the battery. Recommended tightening torque is 3Nm (26 lb.inch).
Regarding disposal of used batteries see chapter 2.
Fig. 6-1 Replacing the battery

To replace battery:1) Loosen screw with only one turn.
2) Unscrew the battery terminals.
3) Slide the mounting bracket sideways andtake the mounting bracket off.
4) Remove the battery.
5) To insert the new battery, use sameprocedure vice versa.
Do not over-tighten screws of the terminal
bolts of the battery. Recommended
tightening torque: 3Nm (26lb.inch).

7. ENVIRONMENT
Operational temperature *)-10°C to +50°C (14°F to 122°F)

Storage temperature-15°C to +60°C (5°F to 140°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)
2ShockAltitude
Degree of pollution

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
or performance 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 orientationaccording to IEC/EN 61056-1According 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.

Jun. 2021 / Rev. 2.4 DS-UZK12.261
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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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

8. TERMINALS AND WIRING
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
TypeMaximal wire size, solid wire
Maximal wire size, stranded wire
American Wire Gauge
Maximal wire diameter
Wire stripping length
Screwdriver
Recommended tightening torque

Power terminals
Screw terminals
4mm24mm2AWG 12-10
3.5mm (including ferrules)
7mm / 0.28inch
Slotted 3.5x0.5mm
0.5Nm, 4.5lb.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.

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

IP 00III30A

Isolation

1100Vac

According to EN/IEC 60529
According to EN/IEC 61140
DC-Fuse (blade type) ATOF® 287 030 from Littelfuse
Replacement fuses must be of the same type or an UL listed
fuse with the same nominal value and characteristics.
Isolation voltage between power to chassis

Jun. 2021 / Rev. 2.4 DS-UZK12.261
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

10. APPROVED, FULFILLED OR TESTED STANDARDSIEC 61010-2-201 (UZK12.261)

UL 61010-2-201 (UZK12.261)

ATEX

IECEx

Class I Div 2

Marine (DNV)

Marine (ABS)CB Scheme Certificate
Electrical Equipment for Measurement, Control andLaboratory 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 atmospheres - General requirements
EN 60079-7 Equipment protection by type of protection "e"Certificate: 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 15.0049 X
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: 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: N/A
Enclosure: Class A
ABS Design Assessment Certificate
ABS (American Bureau of Shipment) assessed product
Certificate: 17-HG1599236-PDA

UL 1989 (UZK12.261)

Vendor Certificate
Standard for Standby Batteries
UL94: HBVDMA 24364

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

Jun. 2021 / Rev. 2.4 DS-UZK12.261
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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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

11. 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 andBelarus
8504408200, 8504409000

Jun. 2021 / Rev. 2.4 DS-UZK12.261
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

12. PHYSICAL DIMENSIONS AND WEIGHT
WidthHeight
DepthWeight
Bracket material

214mm / 8.43’’
179mm / 7.05’’
153mm / 6.22’’
10.1kg / 22.3lb
700g / 1.54lb
Zinc-plated steel

For UZK12.261
For UZO12.26

Fig. 12-1 Top viewFig. 12-2 Side viewAll dimensions in mm

All dimensions in mm

Fig. 12-3 Isometric viewFig. 12-4 Hole pattern for wall mountAll dimensions in mm

Jun. 2021 / Rev. 2.4 DS-UZK12.261
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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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

13. 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 coollocation, e.g. near the bottom of the control cabinet. Do not place the battery module near heat generating devices.
Do not overcharge batteries!
Fig. 13-1 Service life (according to EUROBAT) vs.
ambient temperature, typ.

Service Life in Years

10987654321

Design Lifeof BatteryA: 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. 13-2 Battery degradation vs. discharging
cycles, typ.
Cell Capacity

120%

C100%
B

80%

A

60%

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 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. 2.4 DS-UZK12.261
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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UZK12.261, UZO12.26
BATTERY MODULE 12V, 26AH

U-Series

14. MOUNTING ORIENTATIONSThe standard mounting orientation is the vertical installation onto a flat surface.
Fig. 14-1 Standard mounting orientation

The following mounting orientations are also allowed:
Fig. 14-2 Allowed mounting orientations

Do not use the battery module in an upside down position:
Fig. 14-3 Forbidden mounting orientation

Jun. 2021 / Rev. 2.4 DS-UZK12.261
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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