DDR-240B-24 240W DIN Rail Type DC DC Converter
“
Specifications
- Model: DDR-240 series
- Output Voltage: 24V/48V
- Input Voltage:
- B: 16.8~33.6Vdc
- C: 33.6~67.2Vdc
- D: 67.2~154Vdc
- Rated Wattage: 240W
- Peak Current: Up to 15A
- Efficiency: Up to 92.5%
- Operating Temperature: -40°C to +70°C
- Protections: Short Circuit, Overload, Over Voltage, Over
Temperature, Input Reverse Polarity, Input Under Voltage - Isolation: 4KVdc I/O (Reinforced isolation)
- Additional Features: DC OK Relay Contact, Remote ON-OFF
Control - Dimensions: Width only 40mm
Product Usage Instructions
Installation
The DC-DC Converter can be installed on DIN rail TS-35/7.5 or 15
for easy mounting in various applications.
Input/Output Connections
Ensure proper connections of the input and output voltages as
per the specified ranges for the model being used (B, C, or D
types).
Protections
Be aware of the various protection mechanisms in place such as
short circuit protection, overload protection, over voltage
protection, over temperature protection, input reverse polarity
protection, and input under voltage protection.
Remote Control
The DC-DC Converter supports remote ON-OFF control. Refer to the
Function Manual for detailed instructions on how to utilize this
feature.
Temperature Considerations
Operate the converter within the specified temperature range of
-40°C to +70°C. Refer to the derating curve for temperature vs.
load de-rating information.
FAQ
Q: What is the maximum power output of the DDR-240 series?
A: The DDR-240 series has a rated wattage of 240W with peak load
capability up to 15A.
Q: Can the DC-DC Converter be used in industrial control
systems?
A: Yes, the DC-DC Converter is suitable for various applications
including industrial control systems.
Q: What are the safety standards met by the DDR-240
series?
A: The DDR-240 series complies with IEC 62368-1, UL 62368-1, EAC
TP TC 004, AS/NZS 62368.1 safety standards.
“`
240W DIN Rail Type DC-DC Converter
DDR-240 series
User’s Manual
UL62368-1 AS/NZS62368-1 TPTC004 IEC62368-1
Features
Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard Width only 40mm 2:1 wide input range -40~+70 wide working temperature 150% peak load capability Current sharing up to 960W(3+1) DC output adjustable Cooling by free air convection Can be installed on DIN rail TS-35/7.5 or 15 Protections: Short circuit / Overload / Over voltage /
Over temperature / Input reverse polarity/ Input under voltage protection 4KVdc I/O isolation(Reinforced isolation) DC OK relay contact Remote ON-OFF control 3 years warranty
Applications
Bus,tram,metro or railway system Industrial control system Semi-conductor fabrication equipment Factory automation Electro-mechanical Wireless network Telecom or datacom system
GTIN CODE
MW Search: https://www.meanwell.com/serviceGTIN.aspx
Description
DDR-240 series is a 240W DIN Rail type DC-DC converter with main features including DIN rail-type easy installation, ultra slim width (40mm), 2:1 wide input voltage, fanless design, -40~+70 wide operating temperature, 4KVdc I/O isolation, 150% peak load, current sharing,DC OK, adjustable output voltage and full protective functions. This series of models has various input options: 16.8~33.6V / 33.6~67.2V / 67.2~154V and two output options: 24V / 48V and can be used for industrial & railway control, security control, communication system and other fields. Suitable applications include to DC buck/boost regulator, increasing system insulation level and voltage drop compensation along cable…etc.
Model Encoding DDR – 240 B – 24
Output voltage(24/48Vdc) Input voltage (B:16.8~33.6Vdc, C:33.6~67.2Vdc, D:67.2~154Vdc) Rated wattage Series name
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
DDR-240 series
SPECIFICATION
MODEL
DDR-240B-24
DDR-240B-48
DDR-240C-24
DDR-240C-48
DDR-240D-24
DDR-240D-48
OUTPUT
DC VOLTAGE
24V
48V
24V
RATED CURRENT
10A
5A
10A
CURRENT RANGE
0 ~ 10A
0 ~ 5A
0 ~ 10A
RATED POWER
240W
240W
240W
PEAK CURRENT
15A
7.5A
15A
POWER
Note.5 360W (3sec.)
RIPPLE & NOISE (max.) Note.2 80mVp-p
100mVp-p
80mVp-p
VOLTAGE ADJ. RANGE
24 ~ 28V
48 ~ 56V
24 ~ 28V
VOLTAGE TOLERANCE Note.3 ±1.0%
±1.0%
±1.0%
LINE REGULATION
±0.5%
±0.5%
±0.5%
LOAD REGULATION
±1.0%
±1.0%
±1.0%
SETUP, RISE TIME
500ms, 60ms
HOLD UP TIME (Typ.)
Please refer to page 6 Hold up Time( Load de-rating curve )
48V 5A 0 ~ 5A 240W 7.5A
100mVp-p 48 ~ 56V ±1.0% ±0.5% ±1.0%
24V 10A 0 ~ 10A 240W 15A
80mVp-p 24 ~ 28V ±1.0% ±0.5% ±1.0%
48v 5A 0 ~ 5A 240W 7.5A
100mVp-p 48~ 56V ±1.0% ±0.5% ±1.0%
INPUT
VOLTAGE
CONTINUOUS
RANGE Note.4 100ms
EFFICIENCY (Typ.)
90%
16.8 ~ 33.6Vdc 14.4 ~ 16.8Vdc
90%
33.6 ~ 67.2Vdc
28.8 ~33.6Vdc
91%
92%
67.2 ~ 154Vdc
66 ~ 67.2Vdc
92%
92.5%
DC CURRENT (Typ.)
11.2A @24Vdc
5.6A @48Vdc
2.5A @110Vdc
INRUSH CURRENT (Typ.) 30A
INTERRUPTION OF VOLTAGE SUPPLY EN50155:2021-Comply with S1 level
OVERLOAD
Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135% Note.5 rated output power with auto-recovery
OVER VOLTAGE PROTECTION
OVER TEMPERATURE
28.8 ~ 35V
57.6 ~ 65.0V
28.8 ~ 35V
Protection type : Shut down o/p voltage, re-power on to recover
Shut down o/p voltage, re-power on to recover
57.6 ~ 65V
28.8 ~ 35V
57.6 ~ 65V
UNDER VOLTAGE LOCKOUT
24Vin (B – type) :Power ON16.8V , OFF16.5V
48Vin (C – type) :Power ON33.6V , OFF33V
110Vin (D – type):Power ON67.2V , OFF65V
DC OK REALY CONTACT RATINGS (max.) 30Vdc/1A resistive load
FUNCTION CURRENT SHARING
Up to 960W (3+1 units). Please refer to the Function Manual
REMOTE ON-OFF CONTROL Please refer to the Function Manual
WORKING TEMP.
-40 ~ +70 (Refer to “Derating Curve”)
WORKING HUMIDITY
5 ~ 95% RH non-condensing
ENVIRONMENT STORAGE TEMP., HUMIDITY -40 ~ +85, 5 ~ 95% RH non-condensing
TEMP. COEFFICIENT
±0.03%/ (0 ~ 55)
VIBRATION
Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373
OPERATING ALTITUDE Note.7 5000 meters
SAFETY STANDARDS
IEC 62368-1, UL 62368-1, EAC TP TC 004, AS/NZS 62368.1 approved
WITHSTAND VOLTAGE
I/P-O/P:4KVdc I/P-FG:2.5KVdc O/P-FG:0.71KVdc
ISOLATION RESISTANCE I/P-O/P, I/P-FG, O/P-FG:>100M Ohms / 500Vdc / 25/ 70% RH
Parameter
Standard
Test Level / Note
Conducted
BS EN/EN55032
Class B
EMC EMISSION
Radiated
BS EN/EN55032
Class B
SAFETY &
EMC (Note 6)
Voltage Flicker
BS EN/EN61000-3-3
—–
Harmonic Current
—–
—–
BS EN/EN55035 , BS EN/EN61000-6-2(BS EN/EN50082-2)
Parameter
Standard
Test Level / Note
ESD
BS EN/EN61000-4-2
Level 3, 8KV air ; Level 3, 6KV contact; criteria A
Radiated
BS EN/EN61000-4-3
Level 3, 10V/m ; criteria A
EMC IMMUNITY
EFT / Burst Surge
BS EN/EN61000-4-4 BS EN/EN61000-4-5
Level 3, 2KV ; criteria A Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A
Conducted
BS EN/EN61000-4-6
Level 3, 10V ; criteria A
Magnetic Field
BS EN/EN61000-4-8
Level 4, 30A/m ; criteria A
RAILWAY STANDARD
Compliance to BS EN/EN45545-2 for fire protection ; Meet BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration, BS EN/EN50121-3-2 for EMC
MTBF
1415.6K hrs min. Telcordia SR-332 (Bellcore) ; 189.9K hrs min. MIL-HDBK-217F (25)
OTHERS DIMENSION
40*125.2*113.5mm (W*H*D)
PACKING
0.76Kg;20psc/16.2Kg/1.0CUFT
1. All parameters NOT specially mentioned are measured at normal input (B:24Vdc , C:48Vdc , D:110Vdc ) , rated load and 25 of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12″ twisted pair-wire terminated with a 0.1F & 47F parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the derating curve for more details.
NOTE
5. 3 seconds max., please refer to peak loading curves. 6. The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to EMI testing of component power supplies.
(as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf ) 7. The ambient temperature derating of 3.5/1000m with fanless models and of 5/1000m with fan models for operating altitude higher than2000m(6500ft).
Product Liability DisclaimerFor detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter Block Diagram
DC I/P FG
ON/OFF
EMI FILTER
POWER SWITCHING
O.L.P.
Remote Control
PWM CONTROL
DDR-240 series
RECTIFIERS &
FILTER
O.V.P.
DETECTION CIRCUIT
CURRENT SHARE
fosc : 80KHz DC OK +Vo -Vo
P+ P-
Derating Curve
150
120
For 3 sec. (typ.)
100
Continuous 40
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 (VERTICAL)
AMBIENT TEMPERATURE ()
Output derating VS input voltage
100
90
80
C/D Type
70
B Type
60
50
40
B Type: 16.8
21.6
33.6
C Type: 33.6
43.2
67.2
D Type: 67.2
86.4
154
INPUT VOLTAGE (V)
LOAD (%) LOAD (%)
Peak Loading
( 1 ) 360W (150% load)
240W (100% load)
100 sec.
3 sec.
( 2 ) 360W (150% load)
120W (50% load) 10 sec. 3 sec.
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
DDR-240 series
DC OK Relay Contact
Contact Close Contact Open Contact Ratings (max.)
PSU turns on / DC OK. PSU turns off / DC Fail. 30V/1A resistive load.
Function Manual
1. Current sharing (1) Parallel operation is available by connecting the units shown as below (P+,P- are connected mutually in parallel) : (2) The voltage difference among each output should be minimized that less than 0.2V is required. (3) The total output current must not exceed the value determined by the following equation (Output current at parallel operation) =(The rated current per unit) x (Number of unit) x 0.9. (4) In parallel operation 4 units is the maximum, please consult the manufacture for other applications. (5) When in parallel operation, the minimum output load should be greater than 3% of total output load. (Min. load > 3% rated current per unit x number of unit)
+ LOAD –
+V DC OK
-V P- P+ Vo Adj. + DC OK
PSU
+V DC OK
-V P- P+ Vo Adj. + DC OK
PSU
+V DC OK
-V P- P+ Vo Adj. + DC OK
PSU
+V DC OK
-V P- P+ Vo Adj. + DC OK
PSU
2. Remote ON-OFF Control The power supply can be turned ON-OFF by using the “Remote ON-OFF” function.
Remote ON-OFF (TB1 PIN2,4) Open or 4 ~ 10VDC Short or 0 ~ 0.8VDC
Output Status
power supply ON power supply OFF
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
DDR-240 series
Input Fuse
There is one fuse connected in series to the positive input line, which is used to protect against abnormal surge. Fuse specifications of each model are shown as below.
Type
Fuse Type
B
Time-Lag
C
Time-Lag
D
Time-Lag
Reference and Rating Conquer MST, 10A, 250V *2 Conquer MST, 6.3A, 250V *2 Conquer MST, 6.3A, 250V *1
Input Under-Voltage Protection
If input voltage drops below Vimin, the internal control IC shuts down and there is no output voltage. It recovers automatically when input voltage reaches above Vimin,please refer to the cruve below.
DDR-240B-24 Vo 30
25
20
15
Turn On
Turn Off 10
5
16.5
16.8
0
Vin
15 16 17 18 19 20
DDR-240C-24 Vo 30
25
20
15
Turn On
Turn Off 10
5
33.6
0
Vin
31 33 34 35 36 37
DDR-240D-24
Vo 30 25
20
15
Turn On
Turn Off 10
5
65
67.2
0
Vin
65 66 67 68 69 70
Input Reverse Polarity Protection
There is a MOSFET connected in series to the negative input line. If the input polarity is connected reversely, the MOSFET opens and there will be no output to protect the unit.
Inrush Current
Inrush current is suppressed by a resistor during the initial start-up, and then the resistor is bypassed by a MOSFET to reduce power consumption after accomplishing the start-up.
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter Hold-up Time
DDR-240 series
LOAD
Model
Load
B type (24Vin)
C type (48Vin)
D type (110Vin)
100% load
6ms min. 8ms min. 11ms min.
70% load
10ms min. 11ms min. 15ms min.
other load
figure 1,2 figure 3,4 figure 5,6
DDR-240B-24
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms
50ms 60ms 70ms 80ms
TIME (figure 1)
DDR-240C-24
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms
50ms 60ms 70ms 80ms
TIME (figure 3)
DDR-240D-24
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 120ms 130ms
TIME
(figure 5)
LOAD
LOAD
LOAD
DDR-240B-48
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms
50ms 60ms 70ms 80ms
TIME (figure 2)
DDR-240C-48
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms90ms 100ms
TIME (figure 4)
DDR-240D-48
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
0ms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 120ms
TIME (figure 6)
LOAD
LOAD
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
DDR-240 series
Efficiency vs Load & Vin Curve
The efficiency vs load & Vin curves of each model are shown as below.
EFFICIENCY
DDR-240B-24
94% 92% 90% 88% 86% 84% 82% 80%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
33.6Vdc 24Vdc 16.8Vdc
EFFICIENCY
DDR-240B-48
94% 92% 90% 88% 86% 84% 82% 80%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
33.6Vdc 24Vdc 16.8Vdc
EFFICIENCY
DDR-240C-24
95% 90% 85% 80% 75% 70%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
6 7 .2 V dc 48Vdc 3 3 .6 V dc
EFFICIENCY
DDR-240C-48
95% 90% 85% 80% 75% 70%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
6 2 .4 V dc 48Vdc 3 3 .6 V dc
EFFICIENCY
DDR-240D-24
95% 90% 85% 80% 75% 70% 65%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
154Vdc 110Vdc 6 7 .2 V dc
EFFICIENCY
DDR-240D-48
95% 90% 85% 80% 75% 70%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LOAD
154Vdc 110Vdc 67.2V dc
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
Immunity to Environmental Conditions
Test method
Standard
Dry Heat Test
EN 50155 section 13.4.5
Damp Heat Test, Cyclic
EN 50155 section 13.4.8
Vibration Test
EN 50155 section 13.4.10
Shock Test
EN 50155 section 13.4.10
Low Temperature Storage Test EN 50155 section 13.4.6
Salt Mist Test
EN 50155 section 13.4.13
DDR-240 series
Test conditions
Temperature: 70 / 85 Duration: 6 hrs / 10min
Temperature: 25~55 Humidity: 90%~100% RH Duration: 48 hrs Temperature: 19 Humidity: 65% Duration: 10 mins Temperature: 21± 3 Humidity: 65 ± 5% Duration: 30ms*18
Temperature: -40 Dwell Time: 16 hrs
Temperature: 35±2 Duration: 96 hrs
Status PASS PASS PASS PASS PASS PASS
EN45545-2 Fire Test Conditions
PCB
Potting Termina; block
Test Items
Items
Standard
Oxygen index test
EN 45545-2:2020 EN ISO 4589-2:2017
R22 Smoke density test
EN 45545-2:2020 EN ISO 5659-2:2017
Smoke toxicity test
EN 45545-2:2020 EN 17084:2018
R24 Oxygen index test R25 Glow-wire test
EN 45545-2:2020 EN ISO 4589-2:2017
EN 45545-2:2020 EN 60695-2-11:2014
R24 Oxygen index test
EN 45545-2:2020 EN ISO 4589-2:2017
R26 Vertical flame test
EN 45545-2:2020 EN 60695-11-10:2013
HL1 PASS PASS PASS PASS PASS PASS PASS
Hazard Level HL2 PASS PASS PASS PASS PASS PASS PASS
HL3 PASS PASS PASS PASS PASS PASS PASS
File Name:DDR-240-SPEC 2025-07-18
240W DIN Rail Type DC-DC Converter
Mechanical Specification
(Unit: mm , tolerance ± 1mm)
DDR-240 series
Case No.265A-D
35
125.2
113.5
Side View
Installation Instruction
Top View
40
1234 5678
Vo Adj. + DC OK
TB2 TB3
Terminal Pin No. Assignment (TB2,TB3) Pin No. Assignment 1,2 DC output +Vo 5,6 DC output -Vo 3,4 DC OK Relay Contact 7,8 P+,P-
TB1 123 4
Front View
Side View
Terminal Pin No. Assignment (TB1) Pin No. Assignment 1 FG 2 DC input -Vin 3 DC input +Vin 4 Remote ON/OFF
Bottom View
35
This series fits DIN rail TS35/7.5 or TS35/15. For installation details, please refer to the Instruction manual.
ADMISSIBLE DIN-RAIL:TS35/7.5 OR TS35/15
(For reference only. Not included with unit.)
Back View
Installation Manual
Please refer to : http://www.meanwell.com/manual.html
File Name:DDR-240-SPEC 2025-07-18
Documents / Resources
 |
MEAN WELL DDR-240B-24 240W DIN Rail Type DC DC Converter [pdf] Instruction Manual DDR-240B-24, DDR-240B-48, DDR-240C-24, DDR-240C-48, DDR-240D-24, DDR-240D-48, DDR-240B-24 240W DIN Rail Type DC DC Converter, DDR-240B-24, 240W DIN Rail Type DC DC Converter, Rail Type DC DC Converter, Type DC DC Converter, Converter |