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

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

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

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			Parameter		Standard		Test Level / Note
				Conducted		BS EN/EN55032		Class B
				Radiated		BS EN/EN55032		Class B
				Voltage Flicker		BS EN/EN61000-3-3		—–
				Harmonic Current		—–		—–
	EMC IMMUNITY			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
				EFT / Burst		BS EN/EN61000-4-4		Level 3, 2KV ; criteria A
				Surge		BS EN/EN61000-4-5		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
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

Derating Curve

Output derating VS input voltage

Peak Loading

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)

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.

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

EN50155: 2017 version – Comply with S1 level

Efficiency vs Load & Vin Curve

The efficiency vs load & Vin curves of each model are shown as below.

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℃ 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℃ / 85℃ Duration: 6 hrs / 10min	PASS
Damp Heat Test, Cyclic	EN 50155 section 12.2.5 EN 60068-2-30	Temperature: 25℃~55℃ Humidity: 90%~100% RH Duration: 48 hrs	PASS
Vibration Test	EN 50155 section 12.2.11 EN 61373	Temperature: 19℃ Humidity: 65% Duration: 10 mins	PASS
Increased Vibration Test	EN 50155 section 12.2.11 EN 61373	Temperature: 19℃ 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℃ Dwell Time: 16 hrs	PASS
Salt Mist Test	EN 50155 section 12.2.10 (Class ST4)	Temperature: 35℃±2℃ Duration: 96 hrs	PASS

EN45545-2 Fire Test Conditions

Test Items				Hazard Level
	Items	Standard	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

Installation Instruction

This series fits DIN rail TS35/7.5 or TS35/15.
For installation details, please refer to the Instruction manual.

Installation Manual

Please refer to: http://www.meanwell.com/manual.html

Documents / Resources

MEAN WELL DDR-240 series Rail Power Supplies [pdf] Owner's Manual
DDR-240B-24, DDR-240B-48, DDR-240C-24, DDR-240C-48, DDR-240D-24, DDR-240D-48, DDR-240 series Rail Power Supplies, DDR-240 series, Rail Power Supplies, Power Supplies, Supplies

References

User Manual

MEAN WELL DDR-240 series Rail Power Supplies

Product Usage Instructions

FAQ