TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
1
Highlights & Features
• Suitable for 24 V system up to 10 A
• Zero switch over time from loss of DC input to battery
operation
• Built-in diagnostic monitoring for DC OK, Discharge and
Battery Fail by relay contacts
• Full power over entire operating temperature range from
-20°C to +60°C
• LED indicators for DC OK, Battery Charging, Battery
Discharging, Battery Fail and Battery Reverse Polarity
• High MTBF > 500,000 hrs. as per Telcordia SR-332
• Certified according to IEC/EN/UL 62368-1
Safety Standards
CB Certified for worldwide use
Model Number: DRU-24V10ACZ
Unit Weight: 0.14 kg (0.31 lb)
Dimensions (H x W x D): 91.0 x 71.0 x 55.6 mm
(3.58 x 2.80 x 2.19 inch)
General Description
Delta’s Chrome DC-UPS module is designed to use in small cabinets where space is very critical. The module requires less installation
space due to its flat body with depth of only 55.6 mm, 71 mm wide and 91 mm tall. The tough plastic case has flame retardant property
certified to UL 94V-0 specification. The module supports 24Vdc system with external battery up to 12 AH capacity and comes with
potential free contacts for battery management signals and LED indicator for battery status. The highly efficient convection cooled design
is certified to major safety approvals including IEC/UL 60950-1, IEC/EN/UL 62368-1 and UL 508, which allows the module to be used
reliably in most industrial applications.
Model Information
Chrome DC-UPS Module
Model
Number
Input Voltage Range Rated Output
V
oltage
Rated Output Curr
ent
DRU-24V10ACZ 24-28 Vdc 24 Vdc typ. (Depends on V
in
) 10.0 A Max
Model Numbering
DR
U – 24V
10A
C
Z
DIN Rail DC-UPS Module Output Voltage Output Current Chrome Series Z – Black Plastic Case,
without Class I, Div 2
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
2
Specifications
Input Ratings / Characteristics
Nominal Input Voltage
24 Vdc
Input Voltage Range 24-28 Vdc
Input Current Charging Mode 0.5 A ± 0.1 A
Charging Time* < 30 hr ± 5hr for battery 24 V/12 AH
Efficiency Charging Mode > 80.0%
Buffering Mode > 99.0%
Max Power Dissipation Standby Mode < 1 W
Charging Mode < 3.5 W
Buffering Mode < 1 W
*Charging time depends on the last state of discharged battery w.r.t. buffering time and load current.
Output Ratings / Characteristics
Output Voltage Range
23-28 Vdc
Output Current 10.0 A Max
Output Power 240 W Max (24 V, 10 A)
Voltage Drop Between Input and Output Charging Mode 0.2 V between DC input to load
Buffering Mode 0.3 V between battery to load @ 10 A load
Battery Input / Output Characteristics
Nominal Battery Voltage
24 Vdc, SLA Sealed lead acid battery
2 x 12Vdc, SLA Sealed lead acid battery
Battery Voltage Range 23-28 Vdc (continuously operating)
33 Vdc Max (the maximum voltage that will not cause
damage
to the unit)
20 Vdc Min (the voltage level of battery to enable “BAT Fail”
function)
Battery Capacity 3.3 AH to 12 AH
Battery Fuse Auto 15 A / 58 V, MINI (Littelfuse) or similar in the battery
path.
The battery fuse protects the wires between the battery and
the unit.
Battery Charging Mode CC-CV mode (constant current-constant voltage) at 0.5 A
End-of-Charge Voltage The unit always charges with fix input voltage value
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
3
Buffering Time
Output
Current
3.3 AH
7.5 AH
12 AH
0.5 A
400 900 1400
1 A
180 398 654
2 A
70 165 323
4 A
28 72 160
6 A
19 55 103
8 A
11 22 49
10 A
7 18 37
Mechanical
Case Cover / Chassis
Plastic
Dimensions (H x W x D) 91.0 x 71.0 x 55.6 mm (3.58 x 2.80 x 2.19 inch)
Unit Weight 0.14 kg (0.31 lb)
LED Indicator Green LED DC OK, Battery Charging (flash)
Red LED Battery Fail
Orange LED Reverse polarity, Battery Discharging (flash)
Cooling System Convection
Terminal Input / Output / Battery 6 Pins (Rated 300 V/25 A)
Signal 6 Pins (Rated 300 V/25 A)
Wire Input / Output / Battery
AWG 14-12
Signal
AWG 24-12
Mounting Rail
Standard TS35 DIN Rail in accordance with EN 60715
Noise (1 Meter from power supply)
Sound Pressure Level (SPL) < 40 dBA
Fig. 1 Buffering Time VS. Output Current
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
4
Environment
Surrounding Air Temperature
Operating
-20°C to +60°C (full power)
Storage
-25°C to +85°C
Operating Humidity
5 to 95% RH (Non-Condensing)
Operating Altitude 0 to 3,000 Meters (9,840 ft.)
Shock Test Operating IEC 60068-2-27, Half Sine Wave: 4G for a duration of 22 ms,
3 time per direction, 9 times in total
Non-Operating IEC 60068-2-27, Half Sine Wave: 50G for a duration of 11
ms,
3 time per direction, 9 times in total
Vibration Operating IEC 60068-2-6, Sine Wave: 10 Hz to 500 Hz @ 19.6 m/S² (2G
peak); 10 min per cycle, 60 min for all X, Y, Z directions
Non-Operating IEC 60068-2-6, Random: 5 Hz to 500 Hz @ 2.09 Grms);
20 min per axis for all X, Y, Z directions
Pollution Degree
2
Protections
Overvoltage
Buffering Mode
33 Vdc Max will not cause damage to the unit, Latch Mode
Overload / Overcurrent Buffering Mode
< 18 A, Latch Mode
Over Temperature Buffering Mode < 90°C Surrounding Air Temperature inside the unit,
Latch Mode
Short Circuit (at system) Buffering Mode Shutdown, Latch Mode
Input Polarity Protection* Yes (DC OK = open contact, LED Status = Orange)
Battery Polarity Protection* Yes (DC OK = open contact, LED Status = Orange)
Wrong Battery Voltage Protection Shutdown, 35
V Max (the maximum voltage that will not cause
damage to the unit)
Deep Discharge Protection Yes (22 V ± 1 V)**
Degree of Protection IP 20
Protection Against Shock Class III
*If the orange status LED is on, this indicates a failure in the installation. In this case, do not turn on power supply while the battery is connected. Danger of explosion!
** The unit will stop operating when the battery voltage detected is less than 22V ± 1V
Reliability Data
MTBF
> 500,000 hrs. as per Telcordia SR-332
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
5
Safety Standards / Directives
Electrical Equipment of Machines
EN BS EN 60204-1
Electrical Equipment for Use in Electrical Power Installations IEC/EN BS EN 62477-1 / IEC 62103
Safety Entry Low Voltage SELV (IEC 60950-1)
Electrical Safety
SIQ Bauart EN 62368-1
UL/cUL recognized UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E191395)
UL 62368-1 and CSA C22.2 No. 62368-1 (File No. E191395)
CB scheme IEC 60950-1, IEC 62368-1
UKCA BS EN 62368-1
Industrial Control Equipment
UL/cUL listed
UL 508 and CSA C22.2 No. 107.1-01 (File No. E315355)
BIS
IS 13252-1
CE In conformance with EMC Directive 2014/30/EU and
Low Voltage Directive 2014/35/EU
UKCA In conformance with 2016 No. 1101. The Electrical Equipment
(Safety) Regulations 2016 and No. 1091
The Electromagnetic Compatibility Regulations 2016
Galvanic Isolation
Power Port to Signal Port
1.0 KVac
EMC
Emissions (CE & RE)
Generic Standards: CISPR 32, EN/BS EN 55032,
EN/BS EN 55011, FCC Title 47: Class B
Component Power Supply for General Use EN/BS EN 61204-3
Immunity Generic Standards: EN/BS EN 55024, EN/BS EN 61000-6-2
Electrostatic Discharge IEC 61000-4-2 Level 4 Criteria A
1)
Air Discharge: 15 kV
Contact Discharge: 8 kV
Radiated Field IEC 61000-4-3 Level 3 Criteria A
1)
80 MHz-1 GHz, 10 V/M, 80% modulation (1 KHz)
1.4 GHz-2 GHz, 3 V/M, 80% modulation (1 KHz)
2 GHz-2.7 GHz, 1 V/M, 80% modulation (1 KHz)
Electrical Fast Transient / Burst IEC 61000-4-4 Level 3 Criteria A
1)
2 kV (Input power ports)
Surge IEC 61000-4-5 Level 2 Criteria A
1)
0.5 kV (Input power ports)
Conducted IEC 61000-4-6 Level 3 Criteria A
1)
150 kHz-80 MHz, 10 Vrms
Power Frequency Magnetic Fields IEC 61000-4-8 Criteria A
1)
10 A/Meter
1) Criteria A: Normal performance within the specification limits
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
6
Block Diagram
Device Description
1) Input / Output / Battery terminal block connector
2) Signal terminal block connector
3) LED display status
4) Universal mounting rail system
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
7
Dimensions
H x W x D: 91.0 x 71.0 x 55.6 mm (3.58 x 2.80 x 2.19 inch)
Engineering Data
Output Load De-rating VS Surrounding Air Temperature
Note
1. The unit may degrade, or be damaged, when
it is continuously used outside the shaded
region, refer to the graph shown in Fig. 2.
2. When the DC-UPS module is used with power
supply of different ratings, user must follow
power supply derating curve or whichever is
lower.
3. In order for the device to function in the
manner intended, it is also necessary to keep
a safety distance as recommended in the
safety instructions while the device is in
operation.
4. Depending on the surrounding air temperature
and output load delivered by the power
supply, the device can be very hot!
5. If the device has to be mounted in any other
orientation, please leave a message via the
Contact Us form.
Fig. 2 No power de-rating across the entire operating temperature range
(-20°C to +60°C)
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
8
Assembly & Installation
The unit can be mounted on 35mm DIN rails in accordance with EN 60715. For Vertical Mounting, the device should be installed with
Input / Output / Battery terminal block on the bottom.
Each device is delivered ready to install.
Mounting
Safety Instructions
Dismounting
Fig. 3.1 Mounting
Snap on the DIN rail as shown in Fig. 3.1:
1. Pull the unit’s DIN rail latch DOWN.
2. Tilt the unit slightly upwards, hook the top end onto
the DIN rail and push downwards until stopped.
3. Position the bottom front end against the DIN rail.
4. Push the unit’s latch DIN rail UP to lock.
Fig. 3.2 Dismounting
To uninstall,
1. Pull the unit’s DIN rail latch DOWN.
2. Tilt the bottom part of the unit out.
3. Push the unit up and pull out from the DIN rail.
• When replacing batteries, only use the same type of batteries listed
under the “Battery Input / Output Characteristics” section on Page 2.
• Proper disposal of batteries is required. Refer to the relevant local
codes for disposal requirements.
• ALWAYS switch mains of input power OFF before connecting and
disconnecting the input voltage to the unit. If mains are not turned
OFF, there is risk of explosion / severe damage.
• Orange LED will be on if one of Battery/Input connector is reverse
polarity while the other connectors are not connect, check polarity
connection and make corrections.
• If the orange status LED is on, this indicates a failure in the
installation. In this case, do not turn on power supply while the
battery is connected. Danger of explosion!
• To guarantee sufficient convection cooling, keep a distance of
20 mm (0.79 inch) above and below the device as well as a
lateral distance of 5 mm
(0.2 inch) to other units.
• Note that the enclosure of the device can become very hot
depending on the surrounding air temperature and load of the power
supply. Risk of burns!
•
The main power must be turned off before connecting or
disconnecting wires to the terminals!
• DO NOT insert any objects into the unit.
• Hazardous voltages may be present for up to 5 minutes after the
input mains voltage is disconnected. Do not touch the unit during
this time.
• The unit is a built-in unit and must be installed in a cabinet or room
(condensation free environment and indoor location) that is relatively
free of conductive contaminants.
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
9
Functions
Relay Contacts Characteristics
Max Relay Contact Rating
24 Vdc/Vac, 0.5 A
DC BUS OK Relay Contact “DC OK” contact is closed when the DC input voltage is within
24-28 V (±1V) range or the battery voltage is within 23-28 V
range
LED Indicator ON (Green)
Charging Relay Contact “DC OK” contact is closed when the unit is in charging mode
LED Indicator Flashing (Green)
Battery Discharge
1)
Relay Contact “Discharging” contact is closed when the unit is in buffering
mode
LED Indicator Flashing (Orange)
Battery Fail
2)
Relay Contact
“BAT Fail” contact is closed when the battery fails to function or
battery voltage is less than 20 V ± 1 V
LED Indicator ON (Red)
Battery Reverse Polarity Relay Contact All contact are opened when the battery is in reverse polarity
LED Indicator ON (Orange)
Input Reverse Polarity
3)
Relay Contact All contact are opened when the input is in reverse polarity
LED Indicator ON (Orange)
1) Relay contact & LED indicator are functional with output current from 0.1 A to 10 A range, < 0.1 A it is intermittent.
2) While replacing the FAIL battery with system in ON State, user MUST wait for 30secs after removing the FAIL battery and replace with new. In case the user replaces battery
within 30secs and accidently connects the battery in reverse polarity, this may cause the DC-UPS MODULE TO BE DAMAGED!
3) In this case, power supply is Turned ON with full system configuration (as shown in fig 4.1) the module will indicate if the input connections are reverse.
Signals Wiring Diagram
DC-UPS Status
Relay Output Connector
LED Display
Status
Discharging
BAT Fail
DC OK
Battery Charging Open Open Close
Flashing
(Green)
Battery Fully
Charged
Open Open Close
ON
(Green)
Battery Discharging*
(Buffering Mode)
Close Open Close
Flashing
(Orange)
No Battery
Connected**
Open Close Open
ON
(Red)
Output Shutdown Open Open Open OFF
*With output current 0.1 A to 10 A.
**If no battery connected, there is 12 Vdc typ. at B+/B- connector.
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
10
Charging Mode
Typical Application Notes
Fig. 4.1 Provide backup power during AC source interruption or failure
Fig. 4.2 Can be combined with redundancy module (DRR-20 A)
Buffering Mode
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
11
Overload & Overcurrent Protections (Latch Mode)
When the output current exceeds the maximum specified output
current. The DC-UPS module will shut down and protect itself.
Normal operation of the module can be resumed upon removal of
fault and re-application of input voltage.
Short Circuit Protection (Latch Mode)
The module is protected in case of short circuit at customer system,
in the event of short circuit the module will shut down and protect
itself. Normal operation can be resumed upon removal of fault and
re-application of input voltage.
Overvoltage Protection (Latch Mode)
The DC-UPS module’s overvoltage protection will be activated
when DC input to the module exceeds the maximum specified
input voltage. The unit shall shutdown and return to normal state
when the OVP condition is removed. Removal/re-application of
input voltage will then be required in order to restart.
Over Temperature Protection (Latch Mode)
In the event of a higher operating temperature at 100% load, the
power supply will run into OTP when the operating temperature is
beyond what is recommended in the de-rating graph. When
activated, the output voltage will shut down and remain in off state
until the temperature drops to its normal operating temperature as
recommended in the de-rating graph. Removal/re-application of
input voltage will then be required in order to restart.
TECHNICAL DATASHEET
Chrome DC-UPS Module
24 V 10 A
/ DRU-24V10ACZ
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (February 2024, Rev. 06)
12
Troubleshooting
Problem Possible Cause Suggestion
Orange LED is ON
(While other connections are not
done)
Battery connection is reverse polarity.
Check polarity connection and make
corrections.
Orange LED is ON
(Battery Connection is Correct)
(Output Connection is Correct)
Input connection is reverse polarity.
(With power supply connected and Turned ON)
Check polarity connection and make
corrections.
DRU does not operate in
charging mode after input is
applied
Input wiring is open or input voltage to the supply
is not available.
Check wiring and voltage of input supply.
Internal fuse is opened. Contact your local Delta sales support group.
DRU does not operate in
buffering mode after input is
collapsed
Battery wiring is not connected or opened.
Check battery wiring and compare with
Typical Application Notes in this DRU
datasheet. Make corrections as needed.
Battery does not have enough time to be charged
and it is still below the continuous operating
voltage range.
Check battery voltage and compare with
minimum required battery voltage provided
in this DRU datasheet.
Protection mode enable.
Check DRU condition with protection
condition.
Relay contact status does not
match with LED status
DRU has some problem. Contact your local Delta sales support group.
Others
Attention
Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information for
using the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail
(please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim
or action arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of using
the product before placing an order with Delta.
Delta reserves the right to make changes to the information described in the datasheets without notice.
Manufacturer and Authorized Representatives Information
Manufacturer
Thailand
Delta Electronics (Thailand) PCL.
909 Pattana 1 Rd., Muang, Samutprakarn, 10280 Thailand
Taiwan
Delta Electronics, Inc.
3 Tungyuan Road, Chungli Industrial Zone, Taoyuan County
32063, Taiwan
Authorized Representatives
The Netherlands
Delta Greentech (Netherlands) B.V.
Zandsteen 15, 2132 MZ Hoofddorp, The Netherlands
United Kingdom
Delta Electronics Europe Limited
1 Redwood Court, Peel Park Campus,
East Kilbride, Glasgow, G74 5PF, United Kingdom