MEAN WELL DDR-480 Series 480W DIN Rail DC-DC Converter
Brand: MEAN WELL
Product Type: 480W DIN Rail Type DC-DC Converter
Overview
The DDR-480 series from MEAN WELL is a 480W DIN Rail type DC-DC converter designed for industrial and railway applications. It features an ultra-slim width of 85.5mm, a 2:1 wide input voltage range, fanless operation, and a wide operating temperature range of -40°C to +80°C. The series offers 4KVdc I/O isolation, 150% peak load capability, current sharing functionality, DC OK relay contact, adjustable output voltage, and comprehensive protective functions.
Key Features
- Compliance to EN50155 and EN45545-2 railway standards
- Ultra-slim width: 85.5mm
- 2:1 wide input range
- Wide operating temperature: -40°C to +80°C
- 150% peak load capability
- Current sharing up to 1920W (3+1 units)
- DC output adjustable
- Cooling by free air convection
- Can be installed on DIN rail TS-35/7.5 or TS35/15
- 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
- Operating altitude up to 5000 meters (Note.6)
- 3 years warranty
Applications
- Bus, tram, metro, or railway systems ?
- Industrial control systems ?
- Semi-conductor fabrication equipment
- Factory automation
- Electro-mechanical systems
- Wireless networks ?
- Telecom or datacom systems ?
Model Encoding
The model number follows the pattern DDR-480 B/C/D - XX:
- DDR-480: Series name and rated wattage (480W)
- B/C/D: Input voltage range:
- B: 16.8~33.6 Vdc
- C: 33.6~67.2 Vdc
- D: 67.2~154 Vdc
- XX: Output voltage (12V, 24V, or 48Vdc)
Specifications
| MODEL | DDR-480B | DDR-480C | DDR-480D | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 12V | 24V | 48V | 12V | 24V | 48V | 12V | 24V | 48V | |
| DC VOLTAGE | 12V | 24V | 48V | 12V | 24V | 48V | 12V | 24V | 48V |
| RATED CURRENT | 33.4A | 20A | 10A | 33.4A | 20A | 10A | 33.4A | 20A | 10A |
| CURRENT RANGE | 0~33.4A | 0~20A | 0~10A | 0~33.4A | 0~20A | 0~10A | 0~33.4A | 0~20A | 0~10A |
| RATED POWER | 400.8W | 480W | 480W | 400.8W | 480W | 480W | 400.8W | 480W | 480W |
| PEAK OUTPUT POWER (5 sec.) Note.5 | 12Vo: 601.2W, 24Vo/48Vo: 720W | 12Vo: 601.2W, 24Vo/48Vo: 720W | 12Vo: 601.2W, 24Vo/48Vo: 720W | ||||||
| CURRENT 5sec. | 50.1A | 30A | 15A | 50.1A | 30A | 15A | 50.1A | 30A | 15A |
| RIPPLE & NOISE (max.) Note.2 | 100mVp-p | 120mVp-p | 150mVp-p | 100mVp-p | 120mVp-p | 150mVp-p | 100mVp-p | 120mVp-p | 150mVp-p |
| VOLTAGE ADJ. RANGE | 12~14V | 24~28V | 48~56V | 12~14V | 24~28V | 48~56V | 12~14V | 24~28V | 48~56V |
| VOLTAGE TOLERANCE Note.3 | ±1.0% | ±1.0% | ±1.0% | ±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% | ±0.5% | ±0.5% | ±0.5% |
| LOAD REGULATION | ±1.0% | ±1.0% | ±1.0% | ±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 section) | ||||||||
| VOLTAGE CONTINUOUS RANGE Note.4 | 16.8~33.6Vdc | 33.6~67.2Vdc | 67.2~154Vdc | 16.8~33.6Vdc | 33.6~67.2Vdc | 67.2~154Vdc | 16.8~33.6Vdc | 33.6~67.2Vdc | 67.2~154Vdc |
| INPUT | 14.4~16.8Vdc | 28.8~33.6Vdc | 66~67.2Vdc | 14.4~16.8Vdc | 28.8~33.6Vdc | 66~67.2Vdc | 14.4~16.8Vdc | 28.8~33.6Vdc | 66~67.2Vdc |
| EFFICIENCY (Typ.) | 90% | 91% | 90.5% | 91% | 92% | 92% | 91% | 92% | 93% |
| DC CURRENT (Typ.) | 23A @24Vdc | 11.2A @48Vdc | 5A @110Vdc | 23A @24Vdc | 11.2A @48Vdc | 5A @110Vdc | 23A @24Vdc | 11.2A @48Vdc | 5A @110Vdc |
| INRUSH CURRENT (Typ.) | 30A | ||||||||
| INTERRUPTION OF VOLTAGE SUPPLY | EN50155: 2017-B/C/D type comply with S2 level (10ms) @ full load | ||||||||
| OVERLOAD Note.5 | Normally works within 150% rated output power for more than 5 seconds and then constant current protection 105~135% rated output power with auto-recovery | ||||||||
| OVER VOLTAGE PROTECTION | Shut down o/p voltage, re-power on to recover | ||||||||
| OVER TEMPERATURE | Shut down o/p voltage, re-power on to recover | ||||||||
| REVERSE POLARITY | By internal, MOSFET, no damage, recovers automatically after fault condition is removed | ||||||||
| UNDER VOLTAGE LOCKOUT | 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 | ||||||
| DC OK RELAY CONTACT RATINGS (max.) | 30Vdc/1A resistive load | ||||||||
| FUNCTION | |||||||||
| CURRENT SHARING | Up to 1920W (3+1 units). Please refer to the Function Manual | ||||||||
| REMOTE ON-OFF CONTROL | Please refer to the Function Manual | ||||||||
| WORKING TEMP. | -40~+80°C (Refer to "Derating Curve") | ||||||||
| WORKING HUMIDITY | 5~95% RH non-condensing | ||||||||
| ENVIRONMENT | |||||||||
| STORAGE TEMP., HUMIDITY | -40~+85°C, 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.6 | 5000 meters / OVCII | ||||||||
| SAFETY STANDARDS | UL 62368-1, IEC 62368-1, AS/NZS 62368-1, EAC TP TC 004 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 | ||||||||
| SAFETY & EMC (Note 7) | |||||||||
| EMC EMISSION | Parameter | Standard | Test Level / Note | ||||||
| Conducted | EN55032 (CISRP32) | Class A | |||||||
| Radiated | EN55032 (CISRP32) | Class B | |||||||
| Voltage Flicker | EN61000-3-3 | ||||||||
| Harmonic Current | EN55035 | ||||||||
| EMC IMMUNITY | Parameter | Standard | Test Level / Note | ||||||
| ESD | EN61000-4-2 | Level 3, 8KV air; Level 3, 6KV contact; criteria A | |||||||
| Radiated | EN61000-4-3 | Level 3, 10V/m; criteria A | |||||||
| EFT/Burst | EN61000-4-4 | Level 3, 2KV; criteria A | |||||||
| Surge | EN61000-4-5 | Level 3, 1KV/Line-Line; Level 3, 2KV/Line-Line-FG; criteria A | |||||||
| Conducted | EN61000-4-6 | Level 3, 10V; criteria A | |||||||
| Magnetic Field | EN61000-4-8 | Level 4, 30A/m; criteria A | |||||||
| RAILWAY STANDARD | Compliance to EN45545-2 for fire protection; Meet EN50155 / IEC60571 including IEC61373 for shock & vibration, EN50121-3-2 for EMC | ||||||||
| MTBF | 280.0K hrs min. Telcordia SR-332 (Bellcore); 101.7K hrs min. MIL-HDBK-217F (25°C) | ||||||||
| OTHERS | |||||||||
| DIMENSION | 85.5*125.2*128.5mm (W*H*D) | ||||||||
| PACKING | 1.375Kg; 8pcs/12Kg/0.98CUFT | ||||||||
Note: 1. All parameters NOT specially mentioned are measured at normal input (B:24Vdc, C:48Vdc, D:110Vdc), rated load and 25°C of ambient temperature. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1µF & 47µF 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. 5. 150% for 5 seconds, please refer to peak loading curves. 6. The ambient temperature derating of 3.5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than 2000m (6500ft). 7. The power supply is considered as an independent unit, but the final equipment still needs 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 http://www.meanwell.com)
Block Diagram
The block diagram illustrates the internal components and signal flow of the DDR-480 series converter. The input DC power (DC I/P) passes through an EMI Filter to reduce noise. The ON/OFF control signal, managed by Remote Control, interacts with the PWM Control. The Power Switching stage converts the input power. The O.L.P. (Over Load Protection) and O.V.P. (Over Voltage Protection) monitor the output. The Rectifiers & Filter stage smooths the output. A Detection Circuit monitors various parameters. The Current Share function allows for parallel operation. The output provides DC OK status, +Vo (positive output voltage), -Vo (negative output voltage), and P+/P- terminals for current sharing. The FG (Frame Ground) terminal is also shown.
Derating Curves
Ambient Temperature Derating Curve
This graph shows the permissible load percentage (%) against ambient temperature (°C). The curve indicates that the converter can operate at 100% load continuously within a certain temperature range (approximately -20°C to 55°C). A peak load of 150% is permissible for a short duration (5 seconds). For temperatures below -20°C or above 55°C, derating is required. Specific derating curves are provided for different models, with notes indicating variations for DDR-480B/C/D-12 and DDR-480D-24/48 models.
[Graphical representation of Load (%) vs. Ambient Temperature (°C)]
Output Derating VS Input Voltage
This graph illustrates how the output load percentage (%) varies with input voltage (V) for different types of DDR-480 converters (B Type, C/D Type). It shows the input voltage ranges for each type and the corresponding derating required at different input voltage levels.
[Graphical representation of Load (%) vs. Input Voltage (V)]
Functionality Details
Peak Loading
The converter can handle peak loads for short durations. For 12V output models, a peak load of 601.2W (150% of rated power) is available for 5 seconds. For other output voltages (24V, 48V), a peak load of 720W (150%) is available for 5 seconds. The continuous load rating is 400.8W for 12V models and 480W for 24V and 48V models.
DC OK Relay Contact
The DC OK relay contact indicates the status of the power supply. When the contact is closed, the PSU is turned on and operating normally (DC OK). When the contact is open, the PSU is turned off or has failed (DC Fail). The maximum rating for this contact is 30Vdc/1A resistive load.
Current Sharing
Parallel operation is supported by connecting multiple units. The P+ and P- terminals of each unit are connected in parallel. To ensure proper operation, the voltage difference among outputs should be minimized (less than 0.2V). The total output current must not exceed 90% of the sum of the rated currents of the connected units (Total Output Current = Rated Current per Unit × Number of Units × 0.9). A maximum of 4 units can be paralleled; for more units, consult the manufacturer. A minimum output load of 3% of the total output load is required when operating in parallel.
Remote ON-OFF Control
The power supply can be turned ON or OFF remotely using the "Remote ON-OFF" function via TB1 PIN 2 and 4. Applying an open circuit or a voltage between 5.5V and 10VDC turns the power supply ON. Applying a short circuit or a voltage between 0V and 0.8VDC turns the power supply OFF.
Input Fuse
Each model includes an input fuse in series with the positive input line to protect against abnormal surges. The fuse type and rating vary by model:
- Type B: Time-Lag, Conquer MST, 10A, 250V *5
- Type C: Time-Lag, Conquer MST, 8A, 250V *3
- Type D: Time-Lag, Conquer MST, 6.3A, 250V *2
Input Under-Voltage Protection
If the input voltage drops below a specified minimum (Vimin), the internal control IC shuts down the output. The output automatically recovers when the input voltage rises above Vimin. Specific turn-on and turn-off voltages are provided for different input voltage ranges (e.g., DDR-480B-24, DDR-480C-24, DDR-480D-24).
Input Reverse Polarity Protection
Two MOSFETs are connected in series to the negative input line. If the input polarity is reversed, these MOSFETs open, preventing current flow and protecting the unit.
Inrush Current
Inrush current is suppressed during initial startup by a resistor. This resistor is then bypassed by MOSFETs to reduce power consumption after the startup sequence is complete.
Hold-up Time
The hold-up time specification indicates how long the output voltage remains stable after the input power is lost. The EN50155:2017 version of B/C/D types comply with S2 level (10ms) at full load. Tables and curves are provided for different load conditions (100%, 70%, other) and models (B, C, D types) showing the hold-up time in milliseconds.
Efficiency vs Load & Vin Curve
These graphs display the efficiency (%) of the converters across various load levels (10% to 100%) and input voltages (Vin) for each specific model. They help in understanding the power conversion efficiency under different operating conditions.
Environmental and Safety Compliance
Immunity to Environmental Conditions
| Test Method | Standard | Test Conditions | Status |
|---|---|---|---|
| Cooling Test | EN 50155 section 12.2.3 (Column 2, Class TX) EN 60068-2-1 | Temperature: -40°C Dwell Time: 2 hrs/cycle | No damage |
| Dry Heat Test | EN 50155 section 12.2.4 (Column 2, Class TX) EN 50155 section 12.2.4 (Column 3, Class TX & Column 4, Class TX) EN 60068-2-2 | Temperature: 70°C / 85°C Duration: 6 hrs / 10min | PASS |
| Damp Heat Test, Cyclic | EN 50155 section 12.2.5 EN 60068-2-30 | Temperature: 25°C~55°C Humidity: 90%~100% RH Duration: 48 hrs | PASS |
| Vibration Test | EN 50155 section 12.2.11 EN 61373 | Temperature: 19°C Humidity: 65% Duration: 10 mins | PASS |
| Increased Vibration Test | EN 50155 section 12.2.11 EN 61373 | Temperature: 19°C Humidity: 65% Duration: 5 hrs | PASS |
| Shock Test | EN 50155 section 12.2.11 EN 61373 | Temperature: 21±3℃ Humidity: 65 ±5% Duration: 30ms*18 | PASS |
| Low Temperature Storage Test | EN 50155 section 12.2.3 (Column 2, Class TX) EN 60068-2-1 | Temperature: -40°C Dwell Time: 16 hrs | PASS |
| Salt Mist Test | EN 50155 section 12.2.10 (Class ST4) | Temperature: 35℃ ±2℃ Duration: 48 hrs | PASS |
EN45545-2 Fire Test Conditions
| Test Items | Items | Standard | Hazard Level | ||
|---|---|---|---|---|---|
| HL1 | HL2 | HL3 | |||
| Oxygen index test | EN 45545-2:2013 EN ISO 4589-2:1996 | PASS | PASS | PASS | |
| R22 | Smoke density test | EN 45545-2:2013 EN ISO 5659-2:2006 | PASS | PASS | PASS |
| Smoke toxicity test | EN 45545-2:2013 NF X70-100:2006 | PASS | PASS | PASS | |
| R24 | Oxygen index test | EN 45545-2:2013 EN ISO 4589-2:1996 | PASS | PASS | PASS |
| R25 | Glow-wire test | EN 45545-2:2013 EN 60695-2-11:2000 | PASS | PASS | PASS |
| R26 | Vertical flame test | EN 45545-2:2013 EN 60695-11:2003 | PASS | PASS | PASS |
Mechanical Specification
The DDR-480 series features a compact DIN rail mountable design.
- Dimensions: 85.5mm (Width) x 125.2mm (Height) x 128.5mm (Depth)
- Case No.: 984F
- Unit: mm
Terminal Pin Assignments
Terminal Block TB1 (Front View)
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | DC input -Vin |
| 3 | DC input +Vin |
| 4 | Remote ON/OFF |
Terminal Block TB2 (Front View)
| Pin No. | Assignment |
|---|---|
| 1,2 | DC output +Vo |
| 3,4 | DC output -Vo |
| 5,6 | DC OK Relay Contact |
| 7,8 | P+, P- (Current sharing) |
Installation Instruction
This series fits standard DIN rails TS35/7.5 or TS35/15. For detailed installation procedures, please refer to the separate Instruction Manual.
Admissible DIN-RAIL: TS35/7.5 OR TS35/15 (For reference only. Not included with unit.)
Installation Manual: Available at http://www.meanwell.com/manual.html
