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UZK24.122 Installation Manual
EN
Product Description
The UZK24.122 battery module utilizes two non-spillable maintenance-free VRLA lead-acid batteries,
which are assembled in a package with all wiring and fusing included
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battery or as UZO-module without a battery which can be installed at a later date to avoid outdated
batteries.
The battery module also includes a sensor board, which contains 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 life of the batteries and makes 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.
Intended Use
This 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.
Installation Instructions
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 the battery.
Do not store batteries longer than 9 months without charging or performance and lifetime may change.
Every 9 months or whenever the open circuit voltage (OCV) falls below 25.2V, the battery module
should be charged. Apply a charging voltage of 27.6V (at 25°C) for 72 hours. Batteries with an OCV
below 24V should be disposed.
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.
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 6mm
longer than 2m (7ft) to avoid voltage drops on this connection.
Connect the sensor board signals to the DC-UPS by using control wires with a minimum wire size of
2
0.5mm
(AWG 20) and the center tap with a minimum wire size of 1mm
Instructions for replacement and disposal of 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 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 or the battery 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 of Canadian Electrical Code, part 1 is required if used in Canada.
2
(AWG 10). Do not use individual wires
2
(AWG 16).
Technical Data
All values are typical figures unless otherwise noted.
Voltage
DC 24V
Nominal battery capacity
12Ah
Battery current
Max. 40A
Max. 4A
Recommended charging
27.8V
voltage
27.5V
27.15V
26.8V
Self-discharge rate
3% / month
Battery fuse
2*35A
Temperature sensor
PT1000
Temperature range
-10°C to +40°C
-15°C to +50°C
Storage temperature range -20°C to +50°C
Max. wire size (litz wire)
1.5mm²
Wire size AWG
AWG 26-14
Maximum wire diameter
1.5mm
Wire stripping length
5mm / 0.25inch
Tightening torque
0.45Nm / 4lb.inch Sensor board terminals
Size (wxhxd)
203x186x125mm
Weight
9400g / 20.7lb
900g / 2lb
Wiring Scheme
Mechanical Dimensions
All dimensions in mm
Hole Pattern for Wall Mounting
All dimensions in mm
Discharge current
Charging 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
Sensor board terminals
Sensor board terminals
Sensor board terminals
Sensor board terminals
With battery
Without battery
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