MEAN WELL DDR-240 series Rail Power Supplies Owner’s Manual

: August 22, 2024
: MEAN WELL

Table of Contents

MEAN WELL DDR-240 series Rail Power Supplies
Product Usage Instructions
FAQ
Features
Description
SPECIFICATION
Block Diagram
Installation Instruction
Read User Manual Online (PDF format)
Download This Manual (PDF format)

MEAN WELL DDR-240 series Rail Power Supplies

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-PRODUCT

Specifications

Model	Output Voltage	Input Voltage	Rated Wattage
DDR-240B-24	24V	B: 16.8~33.6Vdc	240W
DDR-240B-48	48V	C: 33.6~67.2Vdc	240W
DDR-240C-24	24V	D: 67.2~154Vdc	240W
DDR-240C-48	48V
DDR-240D-24	24V
DDR-240D-48	48V

Product Usage Instructions

Installation

Ensure the power source matches the input voltage range of the converter.
Mount the converter on a DIN rail TS-35/7.5 or 15 securely.
Connect the input and output terminals following the polarity markings.
Ensure proper ventilation for cooling by free air convection.

Operation

Power on the converter within the specified temperature range of -40°C to +70°C.
Use the DC output adjustable feature to set the desired output voltage.
Monitor the status of the converter using the provided protections for short circuits, overload, over-voltage, over-temperature, input reverse polarity, and input under voltage protection.
Utilize the DC OK relay contact and remote ON-OFF control as needed.

Maintenance

Regularly check for any signs of damage or overheating.
Clean the unit as necessary to prevent dust accumulation.
Refer to the user manual for troubleshooting steps in case of any issues.

FAQ

Q: What is the peak load capability of the DDR-240 series?
A: The DDR-240 series has a peak load capability of 150%.
Q: What applications are suitable for the DDR-240 series?
A: The DDR-240 series is suitable for use in bus, tram, metro or railway systems, industrial control systems, semiconductor fabrication equipment, factory automation, electro-mechanical applications, wireless networks, and telecom or datacom systems.
Q: What is the warranty period for the DDR-240 series?
A: The DDR-240 series comes with a 3-year warranty.

Features

Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
Width only 40mm
2:1 wide input range
-40~+70°C 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 1/0 isolation(Reinforced isolation)
DC OK relay contact
Remote ON-OFF control
3 years warranty

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-2

Applications

Bus, tram,metro or railway system
Industrial control system
Semiconductor 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°C wide operating temperature, 4KVdc 1/0 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 systems and other fields.
Suitable applications include to DC buck/boost regulator, increasing system insulation level and voltage drop compensation along cable…etc.

Model Encoding

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-4

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| 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| 15A| 7.5A| 15A| 7.5A| 15A| 7.5A
POWER **Note.5| 360W (3sec.)
RIPPLE & NOISE (max.) **Note.2| 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 Note.3| ±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 )

INPUT

| VOLTAGE RANGE Note.4| CONTINUOUS| 16.8 ~ 33.6Vdc| 33.6 ~ 67.2Vdc| 67.2 ~ 154Vdc
100ms| 14.4 ~ 16.8Vdc| 28.8 ~33.6Vdc| 66 ~ 67.2Vdc
EFFICIENCY (Typ.)| 90%| 90%| 91%| 92%| 92%| 92.5%
DC CURRENT (Typ.)| 11.2A @24Vdc| 5.6A @48Vdc| 2.5A @110Vdc
INRUSH CURRENT (Typ.)| 30A

INTERRUPTION OF VOLTAGE SUPPLY

| EN50155:2007-B/C- type comply with S2 level (10ms)@ 70% load ; D-type comply with S2 level (10ms)@ full load
EN50155:2017-Comply with S1 level

PROTECTION

| ****

OVERLOAD **Note.5**

| 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

OVERVOLTAGE

| 28.8 ~ 35V| 57.6 ~ 65.0V| 28.8 ~ 35V| 57.6 ~ 65V| 28.8 ~ 35V| 57.6 ~ 65V
Protection type: Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE| Shut down the o/p voltage, and 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

| 110Vin (D – type): Power ON≥67.2V,

OFF≤65V

FUNCTION

| 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

ENVIRONMENT

| WORKING TEMP.| -40 ~ +70℃ (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%/℃ (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 & EMC

(Note 6)

| 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

EMC EMISSION

EMC IMMUNITY

OTHERS

| MTBF| 1415.6K hrs min. Telcordia SR-332 (Bellcore); 189.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION| 40125.2113.5mm (WHD)
PACKING| 0.76Kg;20psc/16.2Kg/1.16CUFT

NOTE

| 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 0.1μF & 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. 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 altitudes higher than2000m(6500ft).

※ Product Liability Disclaimer： For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx

Block Diagram

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-5

Derating Curve

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-6

Output derating VS input voltage

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-7

Peak Loading

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-8

DC OK Relay Contact

Contact Close	PSU turns on / DC OK.
Contact Open	PSU turns off / DC fails.
Contact Ratings (max.)	30V/1A resistive load.

Function Manual

Current sharing

Parallel operation is available by connecting the units shown as below (P+, P- are connected mutually in parallel) :
The voltage difference among each output should be minimized that less than 0.2V is required.
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.
In parallel operation 4 units is the maximum, please consult the manufacturer for other applications.
When in parallel operation, the minimum output load should be greater than 3% of the total output load.
(Min. load > 3% rated current per unit x number of unit)

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-9

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)|

Output Status

---|---
Open or 4 ~ 10VDC| power supply ON
Short or 0 ~ 0.8VDC| power supply OFF

Input Fuse
There is one fuse connected in series to the positive input line, which is used to protect against abnormal surges. The fuse specifications of each model are shown as below.

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 and there is no output voltage.
It recovers automatically when the input voltage reaches above Vimin, please refer to the curve below.

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-10

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.

Hold-up Time

EN50155: 2007 version – B/C- type complies with S2 level (10ms)@ 70% load; D-type complies with S2 level (10ms)@ full load, Please refer to the table and curves shown below for the hold-up time specification.

Load

Model

| 100% load| 70% load| another 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

MEAN-WELL-DDR-240-series-Rail-Power-Supplies-FIG-11