DDR-480B-48 [MEANWELL]

480W DIN Rail Type DC-DC Converter;
DDR-480B-48
型号: DDR-480B-48
厂家: MEAN WELL ENTERPRISES CO., LTD.    MEAN WELL ENTERPRISES CO., LTD.
描述:

480W DIN Rail Type DC-DC Converter

文件: 总9页 (文件大小:286K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
User’s Manual  
IEC62368-1  
UL62368-1  
AS/NZS62368-1 TPTC004  
Features  
Applications  
Compliance to BS EN/EN50155 and BS EN/EN45545-2  
Bus,tram,metro or railway system  
Industrial control system  
Semi-conductor fabrication equipment  
Factory automation  
railway standard  
Width only 85.5mm  
2:1 wide input range  
-40~+80wide operating temperature  
150% peak load capability  
Electro-mechanical  
Wireless network  
Current sharing up to 1920W(3+1)  
DC output adjustable  
Telecom or datacom system  
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  
Operating attitude up to 5000 meters(Note.6)  
3 years warranty  
Description  
DDR-480 series is a 480W DIN Rail type DC-DC converter with main features including DIN rail-type easy  
installation, ultra slim width (85.5mm), 2:1 wide input voltage, fanless design, -40~+80wide 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 multiple output options: 12V / 24V / 48V and can beused 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 - 480 B - 24  
Output voltage(12/24/48Vdc)  
Input voltage (B:16.8~33.6Vdc, C:33.6~67.2Vdc, D:67.2~154Vdc)  
Rated wattage  
Series name  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
SPECIFICATION  
MODEL  
DDR-480B-12 DDR-480B-24 DDR-480B-48 DDR-480C-12 DDR-480C-24 DDR-480C-48 DDR-480D-12 DDR-480D-24 DDR-480D-48  
DC VOLTAGE  
12V  
24V  
48V  
12V  
24V  
48V  
12V  
24V  
48V  
RATED CURRENT  
CURRENT RANGE  
RATED POWER  
33.4A  
20A  
10A  
33.4A  
20A  
10A  
33.4A  
20A  
10A  
0 ~ 33.4A  
400.8W  
0 ~ 20A  
480W  
30A  
0 ~ 10A  
480W  
15A  
0 ~ 33.4A  
400.8W  
50.1A  
0 ~ 20A  
480W  
30A  
0 ~ 10A  
480W  
15A  
0 ~ 33.4A  
400.8W  
50.1A  
0 ~ 20A  
480W  
30A  
0 ~ 10A  
480W  
15A  
5sec. 50.1A  
CURRENT  
PEAK  
POWER 5sec.  
OUTPUT  
12Vo: 601.2W, 24Vo / 48Vo : 720W  
Note.5  
RIPPLE & NOISE (max.) Note.2 100mVp-p  
120mVp-p  
24 ~ 28V  
1.0%  
150mVp-p  
48~ 56V  
1.0%  
100mVp-p  
12 ~ 14V  
1.0%  
120mVp-p  
24 ~ 28V  
1.0%  
150mVp-p  
48~ 56V  
1.0%  
100mVp-p  
12 ~ 14V  
1.0%  
120mVp-p  
24 ~ 28V  
1.0%  
150mVp-p  
48~ 56V  
1.0%  
VOLTAGE ADJ. RANGE  
VOLTAGE TOLERANCE Note.3  
LINE REGULATION  
12 ~ 14V  
1.0%  
0.5%  
0.5%  
0.5%  
0.5%  
0.5%  
0.5%  
0.5%  
0.5%  
0.5%  
LOAD REGULATION  
SETUP, RISE TIME  
1.0%  
1.0%  
1.0%  
1.0%  
1.0%  
1.0%  
1.0%  
1.0%  
1.0%  
500ms, 60ms  
HOLD UP TIME (Typ.)  
Please refer to page 6 hold up time (Load de-rating curve )  
VOLTAGE  
RANGE  
Note.4  
CONTINUOUS  
100ms  
16.8 ~ 33.6Vdc  
14.4 ~ 16.8Vdc  
91%  
33.6 ~ 67.2Vdc  
67.2 ~ 154Vdc  
66 ~ 67.2Vdc  
92%  
28.8 ~ 33.6Vdc  
92%  
EFFICIENCY (Typ.)  
90%  
90.5%  
91%  
92%  
91%  
93%  
INPUT  
23A @24Vdc  
30A  
11.2A @48Vdc  
5A @110Vdc  
DC CURRENT (Typ.)  
INRUSH CURRENT (Typ.)  
INTERRUPTION OF VOLTAGE SUPPLY  
EN50155: 2017-B/C/D type comply with S2 level (10ms)@ full load  
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  
OVERLOAD  
Note.5  
14.4 ~ 17.5V 28.8 ~ 35V 57.6 ~ 65V  
14.4 ~ 17.5V 28.8 ~ 35V 57.6 ~ 65V  
14.4 ~ 17.5V 28.8 ~ 35V 57.6 ~ 65V  
OVER VOLTAGE  
Protection type : Shut down o/p voltage, re-power on to recover  
Shut down o/p voltage, re-power on to recover  
PROTECTION  
OVER TEMPERATURE  
REVERSE POLARITY  
By internal, MOSFET, no damage, recovers automatically after fault condition is removed  
24Vin (B - type) :Power ON16.8V ,  
48Vin (C - type) :Power ON33.6V ,  
110Vin (D - type):Power ON67.2V ,  
OFF65V  
UNDER VOLTAGE LOCKOUT  
OFF16.5V  
OFF33V  
DC OK REALY CONTACT RATINGS (max.)  
CURRENT SHARING  
30Vdc/1A resistive load  
FUNCTION  
Up to 1920W (3+1 units). Please refer to the Function Manual  
Please refer to the Function Manual  
-40 ~ +80(Refer to "Derating Curve")  
5 ~ 95% RH non-condensing  
REMOTE ON-OFF CONTROL  
WORKING TEMP.  
WORKING HUMIDITY  
-40 ~ +85, 5 ~ 95% RH non-condensing  
ENVIRONMENT STORAGE TEMP., HUMIDITY  
TEMP. COEFFICIENT  
0.03%/(0 ~ 55)  
Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373  
5000 meters / OVCⅡ  
VIBRATION  
OPERATING ALTITUDE Note.6  
SAFETY STANDARDS  
UL 62368-1, IEC 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved  
I/P-O/P:4KVdc I/P-FG:2.5KVdc O/P-FG:0.71KVdc  
WITHSTAND VOLTAGE  
ISOLATION RESISTANCE  
I/P-O/P, I/P-FG, O/P-FG:>100M Ohms / 500Vdc / 25/ 70% RH  
Parameter  
Conducted  
Radiated  
Standard  
Test Level / Note  
Class A  
BS EN/EN55032 (CISRP32)  
BS EN/EN55032 (CISRP32)  
Class B  
EMC EMISSION  
-----  
Voltage Flicker  
Harmonic Current  
BS EN/EN55035  
Parameter  
ESD  
BS EN/EN61000-3-3  
-----  
SAFETY &  
-----  
EMC  
(Note 7)  
Standard  
Test Level / Note  
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  
Level 3, 8KV air ; Level 3, 6KV contact; criteria A  
Level 3, 10V/m ; criteria A  
Radiated  
EMC IMMUNITY  
EFT / Burst  
Surge  
Level 3, 2KV ; criteria A  
Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A  
Level 3, 10V ; criteria A  
Conducted  
Magnetic Field  
Level 4, 30A/m ; criteria A  
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  
RAILWAY STANDARD  
MTBF  
280.0K hrs min. Telcordia SR-332 (Bellcore) ; 101.7K hrs min. MIL-HDBK-217F (25)  
85.5*125.2*128.5mm (W*H*D)  
OTHERS  
DIMENSION  
PACKING  
1.375Kg;8pcs/12Kg/0.95CUFT  
1. All parameters NOT specially mentioned are measured at normal input (B:24Vdc , C:48Vdc , D:110Vdc ) , rated load and 25of ambient temperature.  
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1 f & 47 f parallel capacitor.  
μ
μ
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% 5 seconds, please refer to peak loading curves.  
NOTE  
6. The ambient temperature derating of 3.5/1000m with fanless models and of 5/1000m with fan models for operating altitude higher than2000m(6500ft).  
7. 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 http://www.meanwell.com)  
Product Liability DisclaimerFor detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Block Diagram  
fosc : 65KHz  
DC OK  
RECTIFIERS  
EMI  
POWER  
+Vo  
-Vo  
I/P  
FG  
DC  
&
FILTER  
SWITCHING  
FILTER  
O.V.P.  
PWM  
O.L.P.  
CONTROL  
DETECTION  
CIRCUIT  
Remote  
Control  
ON/OFF  
P+  
P-  
CURRENT  
SHARE  
Derating Curve  
150  
100  
For 5 sec. (typ.)  
Continuous  
For others  
For DDR-480B/C/D-12 & DDR-480D-24/48  
40  
-40  
-20  
0
20  
40  
55 60  
80  
(VERTICAL)  
AMBIENT TEMPERATURE ()  
Output derating VS Input Voltage  
100  
90  
C/D Type  
80  
70  
B Type  
60  
50  
40  
B Type:  
21.6  
43.2  
86.4  
33.6  
16.8  
33.6  
67.2  
C Type:  
D Type:  
67.2  
154  
INPUT VOLTAGE (V)  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Peak Loading  
601.2W for 12Vo  
720W for others  
(150% load)  
400.8W for 12Vo  
480W for others  
(100% load)  
5 sec.  
100 sec.  
DC OK Relay Contact  
Contact Close  
PSU turns on / DC OK.  
PSU turns off / DC Fail.  
30V/1A resistive load.  
Contact Open  
Contact Ratings (max.)  
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  
o
-V  
o
P+ P-  
+V  
o
-V  
o
P+  
P-  
+V  
o
-V  
o
P+ P-  
+V  
o
-V  
o
P+ P-  
DC OK  
DC OK  
DC OK  
DC OK  
DC OK  
DC OK  
DC OK  
DC OK  
+
+
+
+
Vo Adj.  
Vo Adj.  
Vo Adj.  
Vo Adj.  
PSU1  
PSU2  
PSU3  
PSU4  
2. Remote ON-OFF Control  
The power supply can be turned ON-OFF by using the "Remote ON-OFF" function.  
Remote ON-OFF  
Output Status  
(TB1 PIN2,4)  
power supply ON  
power supply OFF  
Open or 5.5 ~ 10VDC  
Short or 0 ~ 0.8VDC  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 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  
B
Fuse Type  
Time-Lag  
Time-Lag  
Time-Lag  
Reference and Rating  
Conquer MST, 10A, 250V *5  
Conquer MST, 8A, 250V *3  
Conquer MST, 6.3A, 250V *2  
C
D
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.  
Turn On  
Turn Off  
DDR-480D-24  
DDR-480B-24  
DDR-480C-24  
30  
30  
30  
Vo  
Vo  
Vo  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
25  
20  
15  
10  
5
16.5  
16.8  
65  
67.2  
33  
33.6  
0
0
0
Vin  
Vin  
Vin  
15  
16  
17  
18  
19  
20  
65  
66  
67  
68  
69  
70  
31  
33  
34  
35  
36  
37  
Input Reverse Polarity Protection  
There are two MOSFETs connected in series to the negative input line. If the input polarity is connected reversely, the MOSFETs open 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 MOSFETs to reduce power  
consumption after accomplishing the start-up.  
Inrush current limit Power start Normal current  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Hold-up Time  
EN50155:2017 version- B/C/D type comply with S2 level (10ms) @ full load , please refer to the table and curves show  
below for the hold up time specification.  
Load  
100% load  
10ms min.  
70% load  
other load  
Model  
B type (24Vin)  
16ms min.  
figure 1,2,3  
figure 4,5,6  
figure 7,8,9  
C type (48Vin)  
D type (110Vin)  
11ms min.  
16ms min.  
17ms min.  
24ms min.  
DDR-480B-12  
DDR-480B-24  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
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 140ms  
0ms  
10ms  
20ms  
30ms  
40ms  
50ms  
60ms  
70ms  
80ms  
90ms  
100ms  
110ms  
120ms  
TIME  
TIME  
figure 1  
figure 2  
DDR-480B-48  
DDR-480C-12  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
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 140ms 150ms 160ms  
0ms  
10ms  
20ms  
30ms  
40ms  
50ms  
60ms  
TIME  
70ms  
80ms  
90ms  
100ms  
110ms  
120ms  
TIME  
figure 3  
figure 4  
DDR-480C-24  
DDR-480C-48  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
0ms  
10ms  
20ms  
30ms  
40ms  
50ms  
60ms  
70ms  
80ms  
90ms  
100ms  
110ms  
120ms  
0ms  
10ms  
20ms  
30ms  
40ms  
50ms  
60ms  
70ms  
80ms  
90ms  
100ms 110ms 120ms 130ms  
TIME  
TIME  
figure 5  
figure 6  
DDR-480D-12  
DDR-480D-24  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
100%  
90%  
80%  
70%  
60%  
50%  
40%  
30%  
20%  
10%  
0%  
0ms  
10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 12 0ms 130ms 140ms 150ms 160ms 170ms 180ms 190ms  
0ms  
10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 120ms 130ms 140ms 150ms 160ms  
figure 8  
figure 7  
TIME  
TIME  
DDR-480D-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 130ms 140ms 150ms 160ms  
figure 9  
TIME  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Efficiency vs Load & Vin Curve  
The efficiency vs load & Vin curves of each model are shown as below.  
DDR-480B-12  
DDR-480B-24  
95%  
90%  
95%  
90%  
85%  
80%  
75%  
70%  
85%  
80%  
75%  
70%  
154Vdc  
110Vdc  
67.2Vdc  
33.6Vdc  
24Vdc  
16.8Vdc  
10%  
20%  
30%  
40%  
50%  
60%  
70%  
80%  
90%  
100%  
10%  
20%  
30%  
40%  
50%  
60%  
70%  
80%  
90% 100%  
LOAD  
LOAD  
DDR-480B-48  
DDR-480C-12  
95%  
90%  
85%  
80%  
75%  
70%  
95%  
90%  
85%  
80%  
75%  
70%  
33.6Vdc  
24Vdc  
24Vdc  
33.6Vdc  
16.8Vdc  
16.8Vdc  
10%  
20%  
30%  
40%  
50%  
60%  
70%  
80%  
90%  
100%  
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%  
LOAD  
LOAD  
DDR-480C-24  
DDR-480C-48  
95%  
90%  
85%  
80%  
75%  
70%  
95%  
90%  
85%  
80%  
75%  
70%  
67.2Vdc  
62.4Vdc  
48Vdc  
48Vdc  
33.6Vdc  
33.6Vdc  
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%  
10%  
20%  
30%  
40%  
50%  
60%  
70%  
80%  
90% 100%  
LOAD  
LOAD  
DDR-480D-12  
DDR-480D-24  
95%  
90%  
85%  
80%  
75%  
70%  
95%  
90%  
85%  
80%  
75%  
70%  
154Vdc  
48Vdc  
110Vdc  
67.2Vdc  
67.2Vdc  
33.6Vdc  
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%  
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%  
LOAD  
LOAD  
DDR-480D-48  
95%  
90%  
85%  
80%  
75%  
70%  
154Vdc  
110Vdc  
67.2Vdc  
10%  
20%  
30%  
40%  
50%  
60%  
70%  
80%  
90%  
100%  
LOAD  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Immunity to Environmental Conditions  
Test method  
Cooling Test  
Standard  
Test conditions  
Status  
Temperature: -40  
EN 50155 section 12.2.3 (Column 2, Class TX)  
EN 60068-2-1  
No damage  
Dwell Time: 2 hrs/cycle  
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℃  
Dry Heat Test  
PASS  
PASS  
PASS  
Duration: 6 hrs / 10min  
Temperature: 25~55℃  
Humidity: 90%~100% RH  
Duration: 48 hrs  
EN 50155 section 12.2.5  
EN 60068-2-30  
Damp Heat Test, Cyclic  
Vibration Test  
Temperature: 19℃  
Humidity: 65%  
EN 50155 section 12.2.11  
EN 61373  
Duration: 10 mins  
Temperature: 19℃  
Humidity: 65%  
EN 50155 section 12.2.11  
EN 61373  
Increased Vibration Test  
PASS  
PASS  
PASS  
Duration: 5 hrs  
Temperature: 21 3℃  
Duration: 30ms*18  
EN 50155 section 12.2.11  
EN 61373  
Humidity: 65  
5%  
Shock Test  
EN 50155 section 12.2.3 (Column 2, Class TX)  
EN 60068-2-1  
Temperature: -40℃  
Low Temperature Storage Test  
Dwell Time: 16 hrs  
Temperature: 352℃  
EN 50155 section 12.2.10 (Class ST4)  
Salt Mist Test  
PASS  
Duration: 48 hrs  
EN45545-2 Fire Test Conditions  
Test Items  
Hazard Level  
Items  
Standard  
HL1  
HL2  
HL3  
EN 45545-2:2013  
Oxygen index test  
Smoke density test  
Smoke toxicity test  
Oxygen index test  
Glow-wire test  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
PASS  
EN ISO 4589-2:1996  
EN 45545-2:2013  
R22  
EN ISO 5659-2:2006  
EN 45545-2:2013  
NF X70-100:2006  
EN 45545-2:2013  
R24  
R25  
R26  
EN ISO 4589-2:1996  
EN 45545-2:2013  
EN 60695-2-11:2000  
EN 45545-2:2013  
EN 60695-11:2003  
Vertical flame test  
File Name:DDR-480-SPEC 2021-09-15  
480W DIN Rail Type DC-DC Converter  
DDR-480 series  
Mechanical Specification  
Case No. 984F  
Unit:mm  
Terminal Pin No. Assignment (TB2)  
Pin No. Assignment  
1,2  
3,4  
5,6  
7,8  
DC output +Vo  
DC output -Vo  
DC OK Relay Contact  
P+,P-(Current sharing)  
Top View  
129.2  
2
6
3 4 5 7 8  
1
TB2  
DC OK  
DC OK  
+
Vo Adj.  
2
1
3
4
TB1  
Side View  
Front View  
Side View  
Terminal Pin No. Assignment (TB1)  
Pin No. Assignment  
1
2
3
4
FG  
DC input -Vin  
DC input +Vin  
Remote ON/OFF  
85.5  
Bottom View  
Installation Instruction  
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-480-SPEC 2021-09-15  

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