Meanwell DBU-3200 Series User manual

DBU-3200
Instruction Manual

DBU-3200 Instruction Manual
Index
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1
1
1
2
2
3
3
4
5
13
14
14
15
15
13
13
14
2
2
Dec. 2018 Version 0
2018-12-18
0. roduct DescriptionP
1.Notes on Operation
2.Mechanical Design and Installation Procedure
3.Derating Curve
4.Pin Assignment
5.LED Indication
6.Explanation of Operation Logic
8.PMBus and CANBus Communication Interface
9.Function Description
10.Wiring for Battery
11.Suggested Battery Capacity
12 Series and Parallel Connection.
13.Troubleshotting
3.1 Charging Current vs Temperature
3.2 Charging Current vs Input Voltage
9.1 Input Voltage Range
9.2 Power Factor Correction PFC()
9.3 Temperature Compensation
7.Charge Curve

1
0.Product Description
1.Notes on Operation:
DBU-3200 is MEAN WELL's new generation intelligent battery charger with high power density.
Different battery brands and types (lead acid batteries, such as flooded, Gel, AGM, and so on, or
lithium-ion batteries, such as lithium iron, lithium manganese, and so on) may require different
charging curves and protection mechanisms for batteries, DBU-3200 is able to be accommodated
through the communication interface; parameters, such as charge voltage, charge current and taper
current, can be adjusted and the protection mechanisms for batteries can also be cancelled.
◎The charger must be installed in a dry and well ventilated area. It should not be exposed to rain
or snow.
◎The cables between charger and battery should be kept as short as possible to prevent excessive
voltage drop. Too much voltage drop will lead to longer charging period.
◎Please make sure charging voltage and current meet battery specification.
◎While charging batteries in series do not mix old and new batteries in the same connection.,
◎When connecting or disconnecting wires, please ensure the charger is OFF.
◎Under normal operating conditions, a 5 years warranty is offered for DBU-3200. If failure results
from improper operation, the warranty will not apply to the defective units.
1
2.Mechanical Design and Installation Procedure
Warning: Before connecting a battery, please make sure
the polarity is correct to avoid damaging the charger
+ -
Batteries
SVR
CN500
CN1
SW1
CN500
-V
+V
CN1
FG L N
1
115
2
16
7
2
8
Figure2.1 Front panel

15
16
RTH+
RTH-
Temperature sensor(NTC, 5KOhm) comes along with the charger can be connected to the unit to allow temperature
compensation of the charging voltage.
Installation Procedure:
Please make sure the charger is OFF before connecting the battery to the output terminal. Choose a
cable with suitable wire gauge according to the charging current to connect between the charger and
the battery. Battery polarity must be connected correctly:Terminal(+) to Battery(+); Terminal(-) to
Battery(-), and take notice that the positive and negative ends are not shorted.
3.Derating Curve
4.Pin Assignment
3.1 Charging current vs Temperature 3.2 Charging current vs Input Voltage
AMBIENT TEMPERATURE ( )℃
LOAD (%)
LOAD (%)
INPUT VOLTAGE (VAC) 60Hz
CN1
230VAC
Input only
-30 -25 0-10 15 30 50 60 70
20
40
60
50
80
100
(HORIZONTAL) 90 100 115 180 264
80
90
100
70
60
50
40
30
1
2
15
16
2
Pin No. Function Description
4
2
7,8,9
10
5
6
3
1
12
11
Remote
ON-OFF
GND-AUX
DC-OK
T-ALARM
+5V-AUX
+12V-AUX
PV
PC
A0,A1,A2
D0
Auxiliary voltage output GND.
The signal return is isolated from the output terminals (+V & -V).
Auxiliary voltage output, 4.5~5.5V, referenced to GND-AUX (pin2).
Auxiliary voltage output, 10.6~13.2V, referenced to GND-AUX (pin2).
The maximum load current is 0.3A. This output has the built-in "Oring diodes" and is not controlled by “Remote ON-OFF
The maximum load current is 0.8A. This output has the built-in "Oring diodes" and is not controlled by “Remote ON-OFF”.
Connection for output voltage programming. (Note.1)
High (4.5 ~ 5.5V) : When the internal temperature exceeds the limit of temperature alarm, or when Fan fails.
Low (-0.1 ~ 0.5V) : When the internal temperature is normal, and when Fan works normally.
The maximum sourcing current is 10mA and only for output(Note.2)
Connection for output current programming. (Note.1)
Low (-0.1 ~ 0.5V) : When Vout 16V/32V . The maximum sourcing current is 10mA and only for output. (Note.2)≧±1V
DC OK is associated with battery low protection.
High (4.5 ~ 5.5V) : When the Vout 16V/32V .≦±1V
PMBus interface address lines. (Note.1)
DIP-switch interface lines for charging curve selection. (Note.1)
The unit can turn the output ON/OFF by electrical signal or dry contact between and . (Note.2)Remote ON/OFF +5V-AUX
Short (4.5 ~ 5.5V) : Power ON ; Open (-0.1 ~ 0.5V) : Power OFF ; The maximum input voltage is 5.5V.
Note1: Non-isolated signal, referenced to the [-V(signal)].
Note2: Isolated signal, referenced to GND-AUX.
13
14
+V (Signal)
-V (Signal)
Positive output voltage signal.
Negative output voltage signal.
It cannot be connected directly to the load.
It is for certain function reference; it cannot be connected directly to the load.

3
CN500
78
12
6.Explanation of Operation Logic : (3 stage charge)
5.LED Indicators
SW1
Pin No.
1,2
Function
Terminal
resistance
Description
SW1 is the selector of terminal resistor that is designed for DA/DB signals and parallel control function.
At the beginning stage of operation, the charger provides the largest current to charge the batteries,
the LED indicator will lighten in orange. After a period of time (probably a couple of hours, based on
the capacity of the batteries), charging current will decrease gradually. When the output current
reduces to 10% of its maximum value, the charger will go into “float” mode, the LED indicator will
turn to green. The relationship between charging current and charging voltage for each operation
stage is shown in the curves below:
Charge Current
Constant Current
(CURVE_CC)
stage 1 stage 2 stage 3
Constant Voltage
(CURVE_CV) (CURVE_FV)
Float
Start
Charge Voltage
100% CC
10% CC
boost
float
V
V
Orange Green
Color of LED
STATUS
BOOST CHARGE VOLTAGE
FLOAT CHARGE VOLTAGE
28.8V
27.6V
DBU-3200-24
57.6V
55.2V
DBU-3200-48
Figure Charge Curve6.1
CONSTANT CURRENT 110A 55A
Pin No.
1,2
7
8
5,6
3,4
Function
DA
SDA
SCL
DB
-V (Signal)
Description
Differential digital signal for parallel control.
Differential digital signal for parallel control.
Serial clock used in the PMBus interface.
Serial clock used in the PMBus interface.
Negative output voltage signal.
It is for local sense; and certain function reference; it cannot be connected directly to the load.
LED
Green
Orange
Red
Float (stage 3)
Charging (stage 1 or stage 2)
Description
Abnormal status (OTP, OLP, Fan Fail, Charging timeout)

◎Embedded 3 stage charging curve
4
7.Charge Cureve
The factory setting is “default”, which can be programmed via PMBus.
◎Default 3 stage charging curve
Charge Current
Start
Charge Voltage
Color of LED
Constant Current
(CURVE_CC)
stage 1 stage 2 stage 3
Constant Voltage
(CURVE_CV) (CURVE_FV)
Float
100% CC
10% CC
boost
float
V
V
Orange Green
Explanation for 3 stage charge curve
(0) Initial stage (battery analysis) Check battery voltage level to see whether there is a battery：
connected.
(1) Stage 1 (constant current) A constant current is provided so that the battery can be quickly：
charged to 2.4V per cell.
(2) Stage 2 (constant voltage) A constant voltage of 2.4V per cell is provided until the charging：
current gradually reduces to 10%.
(3) Stage 3 (float) The output voltage switches to the float voltage, making it 2.3V per cell to keep the：
battery fully charged.
Note: By factory default, PIN10 and PIN14 on CN1 are connected.
MODEL
24V
48V
Vboost
28.8
57.6
28
56
28.4
56.8
29
58
Vfloat
27.6
55.2
27.2
54.4
26.8
53.6
27
54
Description
Default, programmable
Default, programmable
#1 Pre-defined, gel batter
#1 Pre-defined, gel batter
#2 Pre-defined, flooded battery
#2 Pre-defined, flooded battery
#3 Pre-defined, AGM battery
#3 Pre-defined, AGM battery
CC(default)
110A
55A

8. &PMBus Communication InterfaceCANBus
DBU 3200 it- is compliant with PMBus Rev.1.1, the maximum communication speed is 100KHz and
has the capability of identifying up to 8 addressed units.
◎PMBus communication interface is able to provide the current operating status and information
follow :as s
1. Output voltage, current and internal temperature
Alarm and status2.
.Msanufacturer' and model data3
4 Read/write of charge curve settings
For further CANBus information Please contact MEAN WELL for detail.,
PMBus Device Addre sing and Charge Mode Selections
◎Each - unit should have their unique and own device address to communicate over theDBU 3200
PMbus. This 7-bit address is defined as follows:
1
MSB
0 0 0 A2 A1 A0
LSB
A0-A2 allow users to designate the address for each DBU-3200 unit; these three bits are defined
through PIN7 (A0), PIN8 (A1) and PIN9 (A2) on CN1. There are up to 8 different addresses are
available to be assigned. When connecting one of these pins, for example, PIN8, with PIN14
(-V(Signal)), the corresponding bit, A1, is set to logic “0”; when it is kept open, for example, PIN7, the
corresponding bit, A0, is set to logic “1”. Please refer to Figure 8-1(left) for the detailed setup advice.
◎The charging operation can be determined by the setup over D0, PIN10 on CN1. When D0 is logic
“0”, connecting PIN10 with PIN14(-V(Signal)), DBU-3200 follows a built charging curve to charge the
batteries; when D0 is logic “1”, PIN10 kept open, the charging operation is completely defined by the
control over PMBus, PV/PC or SVR. Please refer to Figure 8-1(right).
Module
No. A0
0
1
2
3
4
5
6
7
A1 A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Device address
Figure 8-1
D0 Description
0 Charging curve
1 PMBus or V PC or SVR controlP/
5

6
Charging Curve
When it is opted for charging curve, D0 set to 0, charging curve function is enabled with additional
PMBus commands. There are 4 built-in charging curves, “default” curve, one pre-defined curve for “gel
battery”, one pre-defined curve for “flooded battery” and one pre-defined curve for “AGM battery”.
Each curve can be selected by Command B4h CURVE_CONFIG.
In addition, users are able to customize their own charge curves, which will be stored to “default” after
modification. CV can be set by Command B1h CURVE_CV; FV can be set by Command B2h
CURVE_FV; Charge current level of stage1 can be set by Command B0h CURVE_CC; Taper current
level from stage 2 to stage 3 can be set by Command B3h CURVE_TC. Please refer to the following
PMBus Command List in table 8-2 for detailed information on commands and parameters.
NOTE: 1. The updated charging parameters is saved into EEPROM. The updated charging curve
takes effect after DBU-3200 is restarted.
2. When charging curve is enabled, the following commands will be invalid while other PMBus
commands are effective: Command 01h OPERATION (regarding Remote ON-OFF function),
command 22h VOUT_TRIM (regarding Output voltage programming function) and
command 46h IOUT_OC_FAULT_LIMIT (regarding Output current programming function).
PMBus, PV/PC or SVR Functions:
Users are able to fully control and design the entire charging behavior, without the charging curve,
by one of the following means- PMBus command, PV/PC function or SVR adjustment. The operating
priority is, PMBus > PV/PC > SVR.
NOTE: When operating in this mode, PMBus commands B0h/B1h…B8h can be set but there will
be no response whereas other PMBus commands and functions work normally.

7
Table 8-2
47h
79h
7Ah
7Bh
7Ch
7Dh
1
2
1
1
1
1
Define protection and response when an
output overcurrent fault occurred
Summary status reporting
Output voltage status reporting
Output current status reporting
AC inpit voltage statusreporting
Temperature status reporting
IOUT_OC_FAULT_RESPONSE
STATUS_WORD
STATUS_VOUT
STATUS_IOUT
STATUS_INPUT
STATUS_TEMPERATURE
R Byte
R Word
R Byte
R Byte
R Byte
R Byte
7Eh 1 Communication, logic,
Memory status reporting
STATUS_CML R Byte
81h
80h
88h
8Bh
8Ch
1
1
2
2
2
Fan1 and 2 status reporting
Manufacture specific status reporting
AC input voltage reading value
(format: Linear, N=-1)
Output voltage reading value
(format: Linear, N= -9)
Output current reading value
(format: Linear, N= -2)
STATUS_FANS_1_2
STATUS_MFR_SPECIFIC
READ_VIN
READ_VOUT
READ_IOUT
R Byte
R Byte
R Word
R Word
R Word
90h
91h
98h
2
2
1
Fan speed 1 reading value
(format: Linear, N= 5)
Fan speed 2 reading value
(format: Linear, N= 5)
The compliant revision of the PMBus
(default: 11h for Rev. 1.1)
READ_FAN_SPEED_1
READ_FAN_SPEED_2
PMBUS_REVISION
R Word
R Word
R Byte
99h
9Ah
9Bh
9Ch
9Dh
9Eh
12
12
6
3
6
12
Manufacturer's name
Manufacturer's model name
Firmware revision
Manufacturer's factory location
Manufacture date. (format: YYMMDD)
Product serial number
MFR_ID
MFR_MODEL
MFR_REVISION
MFR_LOCATION
MFR_DATE
MFR_SERIAL
Block Read
Block Read
Block Read
Block R/W
Block R/W
Block R/W
Command
Code
01h
02h
19h
20h
21h
# of data
Bytes
1
1
1
1
2
Description
Remote ON/OFF control
ON/OFF function configuration
Capabilities of a PMBus device
Define data format for output voltage
(format: Linear, N= -9)
Output voltage setting value
(format: Linear, N= -9)
Command
Name
OPERATION
ON_OFF_CONFIG
CAPABILITY
VOUT_MODE
VOUT_COMMAND
Transaction
Type
R/W Byte
Read Byte
Read Byte
R Byte
R Word
22h 2 Output voltage trimmed value
(format: Linear, N= -9)
VOUT_TRIM R/W Word
46h 2Output overcurrent setting value
(format: Linear, N= -2)
IOUT_OC_FAULT_LIMIT R/W Word

8
◎Definition of Command B4h CURVE_CONFIG：
Note：
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
High byte -----FVTOE CVTOE CCTOE
Low byte -STGS -- TCS CUVS
Low byte
Bit 1-0 CUVS ：Charge Curve selecting
00＝Customized Charge Curve (default)
01＝Gel Battery
10＝Flooded Battery
Bit 3-2 TCS：Temperature Compensation setting
Bit 6 STGS 2/3：stage charge setting
High byte
00 disable＝
0 3 (default, Curve_VBST and CURVE_V FLOAT)＝stage charge
Bit 0 CCTOE：Constant Current Stage timeout indication enable
Bit 1 CVTOE：Constant Voltage Stage timeout indication enable
Bit 2 FVTOE Float Voltage Stage Timeout Indication Enable：
01 -3 mV/ /cell (default)＝℃
1 2 only CURVE VBST＝(_)stage charge
0 (default)＝disabled
0 (default)＝disabled
0 (default)＝disabled
1＝enabled
1＝enabled
1＝enabled
10 -4 mV/ /cell＝℃
11 -5 mV/ /cell＝℃
B8h
B4h
B5h
B6h
B7h
B3h
2
2
2
2
2
2
Charger's status reporting
Configuration setting of charging curve
CC stage timeout setting value of charging curve
(format: Linear, N= 0)
CV stage timeout setting value of chargingcurve
(format: Linear, N= 0)
Floating timeout setting value of charging curve
(format: Linear, N= 0)
Taper current setting value of charging curve
(format: Linear, N= - )2
CHG_STATUS
CURVE_CONFIG
CURVE_CC_TIMEOUT
CURVE_CV_TIMEOUT
CURVE_FLOAT_TIMEOUT
CURVE_TC
READ Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
Command
Code
# of data
Bytes Description
Command
Name
Transaction
Type
B0h
B1h
B2h
2
2
2
Constant current setting value of charging curve
(format: Linear, N= - )2
Constant voltage setting value of charging curve
(format: Linear, N= -9)
Constant voltage setting value of charging curve
(format: Linear, N= -9)
CURVE_CC
CURVE_CV
CURVE_FV
R/W Word
R/W Word
R/W Word
Valid when charging according to charge curve (D0=0)
11＝AGM Battery

9
Bit 2 CVM：Constant Voltage Mode Status
0＝the charger NOT in constant voltage mode
1＝the charger in constant voltage mode
Bit 3 FVM：Float Mode Status
0＝the charger NOT in float mode
1＝the charger in float mode
High byte
Bit 0 EEPER: EEPROM Charge Parameter Error
Bit 2 NTCER: Temperature Compensation Status
Bit 3 BTNC: Battery Detection
Bit 5 CCTOF：Time-out Flag of Constant Current Mode
：Bit 6 CVTOF Time-out Flag of Constant Voltage Mode
：Bit 7 FTTOF Time-out Flag of Float Mode
＝0data of charge parameter correct
0＝NO short-circuit in the circuitry of temperature compensation
0＝battery detected
0 time-out＝NO in constant current mode
0 time-out＝NO in constant voltage mode
0＝NO time-out in float mode
1＝data of charge parameter error
1＝the circuitry of temperature compensation has short-circuited
1＝NO battery detected
1＝constant current mode timed out
1＝constant voltage mode timed out
1＝float mode timed out
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2
High byte FVTOF CVTOF CCTOF -NTCERBTNC
CVMFVM
Low byte ----
Low byte
Bit 0 FULLM：Fully Charged
0＝NOT fully charged
1＝fully charged
Bit 1 CCM：Constant Current Mode Status
0＝the charger NOT in constant current mode
1＝the charger in constant current mode
◎Definition of Command B8h CHG_STATUS：
Bit1 Bit0
-
CCM
EEPER
FULLM

10
Note:
EEPER When EEPROM Charge Parameter Error occurs, the charger stops charging the battery and
:
the LED indicator turns red. The charger needs to re-power on to re-start charging the battery.
NTCER: When Temperature Compensation Short occurs, the charger output will shut down and the
LED indicator will turn red. The charger will automatically restart after the Temperature
Compensation Short condition is removed.
BTNC When there is no battery detected, the charger stops charging the battery and the LED
:
indicator turns red. The charger needs to re-power on to re-start charging the battery.
CCTOF When timeout arises in the Constant Current stage, the charger stops charging the battery
:
and the LED indicator turns red. The charger needs to re-power on to re-start charging the
battery.
CVTOF When timeout arises in the Constant Voltage stage, the charger stops charging the battery
:
and the LED indicator turns red. The charger needs to re-power on to re-start charging the
battery.
FVTOF: When timeout arises in the Float stage, the charger stops charging the battery and the LED
indicator turns green. This charging flow is finished; the charger needs to re-power on to
start charging a different battery.
PMBus Data Range and Tolerance
◎Display parameters
Figure 8-3
READ_FAN_SPEED_1
READ_FAN_SPEED_2
READ_VOUT
READ_IOUT
(Note. 1)
0 ~ 25000RPM
0 ~ 25000RPM
0 ~ 30V
0 ~ 160A
0 ~ 60V
0 ~ 80A
±2000RPM
±2000RPM
±0.36V
±5.32A
±0.48V
±2.68A
ALL
ALL
24V
24V
48V
48V
PMBus command
READ_VIN
Range
80 ~ 264V
Tolerance
±10V
Model
ALL

PMBus command Adjustable range Tolerance DefaultModel
◎Control parameter
Figure 8-4
11
OPERATION
CURVE_CV
(Note. 3)
CURVE_FV
(Note. 3)
IOUT_OC_FAULT_LIMIT
CURVE_CC
VOUT_COMMAND
(Note. 2)
VOUT_TRIM
(Note. 2)
00h(OFF) / 80h(ON)
18 ~ 30V
18 ~ VBST
22 ~ 110A
36 ~ 60V
36 ~ VBST
11 ~ 55A
-6 ~ 6V
-12 ~ 12V
N/A
N/A
N/A
80h(ON)
±0.36V
±0.36V
±5.32A
±0.48V
±0.48V
±2.68A
28.8V
27.6V
110A
57.6V
55.2V
55A
±0.36V
±0.48V
0V
0V
ALL
24V 24V 24V
24V
24V
24V
24V
48V 48V 48V
48V
48V
48V
48V
CURVE_TC
CURVE_CC_TIMEOUT
CURVE_CV_TIMEOUT
CURVE_FLOAT_TIMEOUT
5.5A ~ 33A
60 ~ 64800 Minute
3A ~ 16.5A
±5.32A
±5 Minute
±2.68A
11A
600 Minute
5.5A
24V
ALL
48V
Minimum readable currentModel
24V 5.3A 1A±
48V 2.7A 1A±
1. will display ZERO amp when output current is less than values in the table below:READ_IOUT
Note:
Adjustable voltage rangeModel
24V 18 ~ 30V
48V 36 ~ 60V
2.
When using PMBus to adjust output voltage, VOUT_COMMAND only can be used to display the
rated voltage of the unit and cannot be written. It is VOUT_TRIM that sets up the amount of
trimmed voltage. Taking DBU-3200-24 as an example, to get a 18V output, please set value of
VOUT_TRIM to -6V. Adjustable voltage range for each model is shown as below:
The value of CURVE_FV should be set less or equal to CURVE_CV,If CURVE_FV is greater than
CURVE_CV, it will be saved as CURVE_FV = CURVE_CV in EEPROM.
Figure 8-5
Figure 8-6
3.

12
When there is no any PMBus command detected for 10 sec, the charger restores to the factory
default settings, that is operation = ON…etc. please refer to Tabel 8-4.
5.
Data format of IOUT_OC_FAULT_LIMIT(46h), CURVE_ICHG(B0h), CURVE_ITAPER(B3h) is as
below: (Please refer to PMBus_Specification_Part_II_Rev_1-1 for detailed information)
6.
Insert an at least 35msec delay between commands.
4.
7.
7.1DIRECT Data Format
DIRECT format data is a two byte, two’s complement binary integer. IRECT format data may
be used with any command that sends or reads a arametric value. If a PMBus device uses
DIRECT form data, this shall be clearly described in the product literature.
Data format of VOUT_MODE, VOUT_MODE, VOUT_COMMAND, VOUT_TRIM, READ_VIN,
READ_VOUT, READ_IOUT, READ_TEMPERATURE_1, READ_FAN_SPEED_1,
READ_FAN_SPEED_2, CURVE_VBST, CURVE_VFLOAT, CURVE_CC_TIMEOUT,
CURVE_CV_TIMEOUT, CURVE_FLOAT_TIMEOUT is as below: (Please refer to
PMBus_Specification_Part_II_Rev_1-1 for detailed information)

13
7.1.1 Interpreting Received Values
The host system uses the following equation to convert the value received from the
PMBus device into a reading of volts, amperes, degrees Celsius or other units as
appropriate:
7.1.2 Sending A Value
◎Please refer to our specifications about PV/PC or SVR Function.
9.Function description
9.1 Input voltage
◎The AC90~264V DC127~370Vinput voltage range is or .
◎The provided input voltage must fall within the specified range; otherwise, the unit may
9.2 Power factor correction (PFC)
be non-functional. Also the active PFC circuit may fail or get damaged.
output. On the other hand, if the input voltage is > 230V or output is not at full load, the PF will
◎The efficiency will be lower and the output current should be reduced according to the
◎Built-in active PFC circuit: PF>0.95 when input voltage is between 90-230Vac with full load at the
Derating Curve when the unit is applied with an input voltage below AC180V.
drop below 0.95

10.Wiring for battery
AWG
14 2.1 12
12 3.3 22
10 5.3 35
710 46
616 60
4
2
25
43
80
110
Cross section(mm )
2Maximum current(A)
UL1015(600V 105 )℃
14
Select suitable wire guage based on rated charging current. Refer to the following table for
minimum wire gauge. It is highly recommended using RED wire for (+) connection and BLACK wire
for (-) connection
93.Temperature Compensation
PIN16 RTH-
PIN15 RTH+
CN1 +V
-V
NTC
Temperature sensor which comes with the charger can be connected to the unit to allow
temperature compensation of the charging voltage. If the temperature sensor is not used, the
charger can still work normally.
11.Suggested attery apacityBC
Note:1.Using battery capacity larger than the suggested value will not lead to damage of the battery.
Model
DPU-3200-24
DPU-3200-48
330-1000AH
180-550AH
Battery capacity
The main drawback is it may take longer to fully charge the battery.
2.If you're unsure about max allowable charging current of your battery, please refer to the
battery's technical specification or consult its manufacturer.

1.3Troubleshooting
If you are unable to clarify the problem you are facing, please contact MEAN WELL or any of
our distributors for repair service.
Failure State
Unable to charge
the battery
LED indicator does
not turn Green after
a long charging
period
Possible Cause
Make sure input source is
between 90~264VAC
Replace with a new battery
Replace with suitable wire gauge
Input voltage too low
Battery is over lifetime or damaged
Output cables are too thin
Suggested Solutions
15
2.Batteries in parallel
When 2 batteries are connected in parallel, voltage remains the same and the capacity (Ah) doubles.
For example, 2 x 12V 100Ah batteries connected in parallel = 12V 200Ah.
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Batteries
Batteries
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1.2Series and Parallel Connection of Batteries
1.Batteries in series
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Voltage can be doubled when 2 batteries are connected in series However the capacity Ah will., ()
., =.remain the same For example 2 x 12V 100Ah batteries connected in series 24V 100A
BatteriesBatteries

No.28, Wuquan 3rd Rd., Wugu Dist., New Taipei City 248, Taiwan