MEAN WELL DDR-240 Series 240W DIN Rail DC-DC Converter
Product Overview
The MEAN WELL DDR-240 series is a 240W DIN Rail type DC-DC converter designed for easy installation on DIN rails (TS-35/7.5 or TS-35/15). It features an ultra-slim width of 40mm, a 2:1 wide input voltage range, fanless operation, and a wide operating temperature range of -40°C to +70°C. The converters offer 4KVdc I/O isolation, 150% peak load capability, current sharing up to 960W (3+1 units), adjustable output voltage, and comprehensive protective functions.
This series is suitable for industrial and railway control, security systems, communication systems, and other applications requiring DC buck/boost regulation, increased system insulation, or voltage drop compensation along cables.
Key Features:
- Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standards.
- 40mm width for space-saving installation.
- 2:1 wide input voltage range.
- Wide working temperature: -40°C to +70°C.
- 150% peak load capability.
- Current sharing up to 960W (3+1 units).
- DC output adjustable.
- Cooling by free air convection.
- Installable on DIN rail TS-35/7.5 or TS-35/15.
- Protections: Short circuit, Overload, Over voltage, Over temperature, Input reverse polarity, Input under voltage.
- 4KVdc I/O isolation (Reinforced isolation).
- DC OK relay contact.
- Remote ON-OFF control.
- 3 years warranty.
Applications
- Bus, tram, metro, or railway systems.
- Industrial control systems.
- Semiconductor fabrication equipment.
- Factory automation.
- Electro-mechanical systems.
- Wireless networks.
- Telecom or datacom systems.
Model Encoding
The model encoding follows the pattern: DDR-240 [Input Voltage Code] - [Output Voltage]
- Series Name: DDR-240
- Input Voltage Code: B (16.8~33.6Vdc), C (33.6~67.2Vdc), D (67.2~154Vdc)
- Output Voltage: 24Vdc or 48Vdc
- Rated Wattage: 240W
Specifications
| MODEL | DDR-240B-24 | DDR-240B-48 | DDR-240C-24 | DDR-240C-48 | DDR-240D-24 | DDR-240D-48 |
|---|---|---|---|---|---|---|
| DC VOLTAGE | 24V | 48V | 24V | 48V | 24V | 48V |
| RATED CURRENT | 10A | 5A | 10A | 5A | 10A | 5A |
| CURRENT RANGE | 0~10A | 0~5A | 0~10A | 0~5A | 0~10A | 0~5A |
| RATED POWER | 240W | 240W | 240W | 240W | 240W | 240W |
| PEAK CURRENT (max.) | 15A | 7.5A | 15A | 7.5A | 15A | 7.5A |
| RIPPLE & NOISE (max.) | 80mVp-p | 100mVp-p | 80mVp-p | 100mVp-p | 80mVp-p | 100mVp-p |
| VOLTAGE ADJ. RANGE | 24~28V | 48~56V | 24~28V | 48~56V | 24~28V | 48~56V |
| VOLTAGE TOLERANCE | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% |
| LINE REGULATION | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% |
| LOAD REGULATION | ±1.0% | ±1.0% | ±1.0% | ±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) | |||||
| CONTINUOUS VOLTAGE RANGE | 16.8~33.6Vdc | 33.6~67.2Vdc | 16.8~33.6Vdc | 33.6~67.2Vdc | 67.2~154Vdc | 67.2~154Vdc |
| INPUT VOLTAGE RANGE Note.4 | 14.4~16.8Vdc | 28.8~33.6Vdc | 28.8~33.6Vdc | 57.6~67.2Vdc | 66~67.2Vdc | 132~154Vdc |
| EFFICIENCY (Typ.) | 90% | 90% | 91% | 92% | 92% | 92.5% |
| DC CURRENT (Typ.) | 11.2A @24Vdc | 5.6A @48Vdc | 11.2A @24Vdc | 5.6A @48Vdc | 2.5A @110Vdc | 1.25A @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% rated output power with auto-recovery | |||||
| OVER VOLTAGE | Protection type: Shut down o/p voltage, re-power on to recover | |||||
| OVER TEMPERATURE | Shut down o/p voltage, re-power on to recover | |||||
| UNDER VOLTAGE LOCKOUT | 24Vin (B - type) : Power ON 16.8V, OFF 16.5V | 48Vin (C-type): Power ON≥33.6V, OFF 33V | 24Vin (B - type) : Power ON 16.8V, OFF 16.5V | 48Vin (C-type): Power ON≥33.6V, OFF 33V | 110Vin (D - type): Power ON≥67.2V, OFF 65V | 110Vin (D - type): Power ON≥67.2V, OFF 65V |
| DC OK REALY CONTACT RATINGS (max.) | 30Vdc/1A resistive load | |||||
| 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°C (Refer to "Derating Curve") | |||||
| WORKING HUMIDITY | 5~95% RH non-condensing | |||||
| STORAGE TEMP., HUMIDITY | -40~+85, 5~95% RH non-condensing | |||||
| TEMP. COEFFICIENT | ±0.03%/°C (0~55°C) | |||||
| 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°C/70% RH | |||||
| EMC EMISSION | Conducted BS EN/EN55032 Class B Radiated BS EN/EN55032 Class B Voltage Flicker BS EN/EN61000-3-3 Harmonic Current BS EN/EN61000-3-2 Class A |
|||||
| EMC IMMUNITY | Parameter ESD Radiated EFT/Burst Surge Conducted Magnetic Field |
Standard BS EN/EN61000-4-2 BS EN/EN61000-4-3 BS EN/EN61000-4-4 BS EN/EN61000-4-5 BS EN/EN61000-4-6 BS EN/EN61000-4-8 |
Test Level / Note Level 3, 8KV air; Level 3, 6KV contact; criteria A Level 3, 10V/m; criteria A Level 3, 2KV; criteria A Level 3, 1KV/Line-Line ; Level 3, 2KV/Line-Line-FG; criteria A Level 3, 10V; criteria A 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°C) | |||||
| DIMENSION | 40*125.2*113.5mm (W*H*D) | |||||
| PACKING | 0.76Kg; 20psc/16.2Kg/1.0CUFT | |||||
Functional Descriptions
DC OK Relay Contact
| Contact Close | PSU turns on / DC OK. |
|---|---|
| Contact Open | PSU turns off / DC Fail. |
| Contact Ratings (max.) | 30V/1A resistive load. |
Current Sharing
Parallel operation is supported by connecting units in parallel (P+, P- connected mutually). The voltage difference between outputs should be minimized (less than 0.2V). The total output current must not exceed 0.9 times the sum of the rated currents of the units. Maximum 4 units can be paralleled. A minimum output load of 3% of the total output load is required for parallel operation.
Diagram: A block diagram illustrates four PSUs connected in parallel with DC OK indicators and output voltage adjustments.
Remote ON-OFF Control
The power supply can be turned ON/OFF using the "Remote ON-OFF" function.
| Remote ON-OFF (TB1 PIN2,4) | Output Status |
|---|---|
| Open or 4~10VDC | Power supply ON |
| Short or 0~0.8VDC | Power supply OFF |
Input Characteristics
Input Fuse
An internal fuse protects against abnormal surges. Fuse specifications vary by model:
| Type | Fuse Type | Reference and Rating |
|---|---|---|
| B | Time-Lag | Conquer MST, 10A, 250V *2 |
| C | Time-Lag | Conquer MST, 6.3A, 250V *2 |
| D | Time-Lag | Conquer MST, 6.3A, 250V *1 |
Input Under-Voltage Protection
If the input voltage drops below Vimin, the internal control IC shuts down the output. Operation resumes when the input voltage rises above Vimin. Curves are provided for DDR-240B-24, DDR-240C-24, and DDR-240D-24 showing Turn On and Turn Off voltage thresholds.
Input Reverse Polarity Protection
A MOSFET in series with the negative input line prevents damage if the input polarity is reversed; the MOSFET opens, stopping output.
Inrush Current
An inrush current limiter resistor is used during startup, bypassed by a MOSFET after startup to reduce power consumption.
Hold-up Time
Hold-up times vary based on the model and load conditions. Figures are provided for different models (DDR-240B-24, DDR-240B-48, DDR-240C-24, DDR-240C-48, DDR-240D-24, DDR-240D-48) showing load percentage versus time in milliseconds.
| Model | 100% load | 70% load | other load |
|---|---|---|---|
| B type (24Vin) | 6ms min. | 10ms min. | figure 1,2 |
| C type (48Vin) | 8ms min. | 11ms min. | figure 3,4 |
| D type (110Vin) | 11ms min. | 15ms min. | figure 5,6 |
Efficiency vs Load & Vin Curve
Efficiency curves are provided for each model, illustrating efficiency as a function of load percentage and input voltage. Graphs are available for DDR-240B-24, DDR-240B-48, DDR-240C-24, DDR-240C-48, DDR-240D-24, and DDR-240D-48.
Immunity to Environmental Conditions
| Test Method | Standard | Test Conditions | Status |
|---|---|---|---|
| Dry Heat Test | EN 50155 section 13.4.5 | Temperature: 70°C / 85°C, Duration: 6 hrs / 10min | PASS |
| Damp Heat Test, Cyclic | EN 50155 section 13.4.8 | Temperature: 25°C~55°C, Humidity: 90%~100% RH, Duration: 48 hrs | PASS |
| Vibration Test | EN 50155 section 13.4.10 | Temperature: 19°C, Humidity: 65%, Duration: 10 mins | PASS |
| Shock Test | EN 50155 section 13.4.10 | Temperature: 21±3℃, Humidity: 65 ± 5%, Duration: 30ms*18 | PASS |
| Low Temperature Storage Test | EN 50155 section 13.4.6 | Temperature: -40°C, Dwell Time: 16 hrs | PASS |
| Salt Mist Test | EN 50155 section 13.4.13 | Temperature: 35℃ ±2℃, Duration: 96 hrs | PASS |
EN45545-2 Fire Test Conditions
| Items | Test Items | Standard | Hazard Level | HL1 | HL2 | HL3 |
|---|---|---|---|---|---|---|
| PCB | Oxygen index test | EN 45545-2:2020 EN ISO 4589-2:2017 | PASS | PASS | PASS | PASS |
| Smoke density test | EN 45545-2:2020 EN ISO 5659-2:2017 | PASS | PASS | PASS | PASS | |
| Smoke toxicity test | EN 45545-2:2020 EN 17084:2018 | PASS | PASS | PASS | PASS | |
| Oxygen index test | EN 45545-2:2020 EN ISO 4589-2:2017 | PASS | PASS | PASS | PASS | |
| Glow-wire test | EN 45545-2:2020 EN 60695-2-11:2014 | PASS | PASS | PASS | PASS | |
| Potting | Oxygen index test | EN 45545-2:2020 EN ISO 4589-2:2017 | PASS | PASS | PASS | PASS |
| Terminal block | Vertical flame test | EN 45545-2:2020 EN 60695-11-10:2013 | PASS | PASS | PASS | PASS |
Mechanical Specification
Dimensions are provided in millimeters (mm) with a tolerance of ± 1mm.
Diagrams: Side View, Top View, Front View, Bottom View, and Terminal Pin Assignments (TB1, TB2, TB3) are illustrated.
Terminal Pin 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- |
Terminal Pin Assignment (TB1):
| Pin No. | Assignment |
|---|---|
| 1 | FG |
| 2 | DC input -Vin |
| 3 | DC input +Vin |
| 4 | Remote ON/OFF |
The series fits DIN rail TS35/7.5 or TS35/15. For installation details, please refer to the Instruction manual.
Installation Manual
For detailed installation instructions, please refer to: http://www.meanwell.com/manual.html
File Info : application/pdf, 9 Pages, 238.76KB
DocumentDocumentReferences
Installation Manual-MEAN WELL Switching Power Supply Manufacturer- Product Liability Disclaimer-MEAN WELL Switching Power Supply Manufacturer
- Global Trade Item Number (GTIN)-MEAN WELL Switching Power Supply Manufacturer
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