Meanwell DRDN20 User manual

Installation Manual
Type：DRDN20/40 DIN rail Type Redundancy Module
DRDN20-12 INPUT：1：9-14VDC 20A OUTPUT：20A (max)
2：9-14 VDC 20A
DRDN20-24 INPUT：1：19-29VDC 20A OUTPUT：20A (max)
2：19-29VDC 20A
DRDN20-48 INPUT：1：36-60VDC 20A OUTPUT：20A (max)
2：36-60VDC 20A
DRDN40-12 INPUT：1：9-14VDC 40A OUTPUT：40A (max)
2：9-14 VDC 40A
DRDN40-24 INPUT：1：19-29VDC 40A OUTPUT：40A (max)
2：19-29VDC 40A
DRDN40-48 INPUT：1：36-60VDC 40A OUTPUT：40A (max)
2：36-60VDC 40A
Introduction
DRDN20/40 is a DIN rail type redundancy module.
Like other Mean Well’s DIN series, they can be mounted on a TS35 Standard DIN rail.
Installation
（1）Always allow good ventilation clearances, 5mm left and right, 40mm above and 20mm below, around the unit
in use to prevent it from overheating.
（2）The appropriate mounting orientation for the unit is vertical, the input terminals at the bottom. Mounting
orientations other than that, such as upside down, horizontal, or table-top mounting, is not allowed.
（3）Use copper wire only, and recommended wires are shown as below.
AWG 18 16 14 12 10 8 6
Rated Current of
Equipment (Amp) 7A 10A 15A 20A 30A 40A 50A
Cross-section of
Lead(mm2) 0.8 1.3 2.1 3.3 5.3 8.4 13.3
Note: 1. Current each wire carries should be de-rated to 80% of the current suggested above when
using 5 or more wires connected to the unit.
2. The maximum allowable wire cross-sectional area for the terminal is 6AWG/13.3 mm2
Make sure that all strands of each stranded wire enter the terminal connection and the screw terminals are
securely fixed to prevent poor contact. If the power supply possesses multi-output terminals, please make
sure each contact is connected to wires to prevent too much current stress on a single contact.
（4）Use wires that can withstand temperatures of at least 80°C, such as UL1007.
（5）Recommended wire strapping length is 5mm (0.197”).
（6）Recommended screwdriver is 4mm, slotted type.

Installation Manual
3
12
4
（7）The recommended torque setting for terminals is shown as below.
Model I/P & O/P DC OK
DRDN20 5.1kgf-cm (4.43Lb-in) TB1: 4.1kgf-cm (3.54Lb-in)
DRDN40 20.21kgf-cm (17.54 Lb-in) TB1: 4.1kgf-cm (3.54Lb-in)
TB2: 5.1kgf-cm (4.43Lb-in)
（8）Mounting Instruction：
Mount as shown in figure only, with input terminals down, or else sufficient cooling will not be possible.
Admissible DIN rail：TS35/7.5 or TS35/15
For rail fastening：
（a）Tilt the unit slightly rearwards.
（b）Fit the unit over top hat rail.
（c）Slide it downward until it hits the stop.
（d）Press against the bottom for locking.
（e）Shake the unit slightly to check the locking action.
（9）For other information about the products, please refer to www.meanwell.com for details.
Typical Application Notes
（1）1+1 Redundancy:
Using 1 more PSU as the redundant unit
"Click"

Installation Manual
（2）1+N Redundancy:
Using more PSUs as the redundant units to increase the reliability
（3）Single Use:
Connecting only one PSU to one DRDN20/40 to reduce the stress of the MOSFET and hence increase the
reliability

Installation Manual
Warning / Caution !!
（1）Risk of electrical shock and energy hazard. All failure should be examined by a qualified technician. Please do
not remove the case of the power supply by yourself!
（2）Risk of electric arcs and electric shock (danger to life). Connecting both the primary and the secondary sides
together is not allowed.
（3）Risk of burn hazard. Do not touch the unit in operation and shortly after disconnection!
（4）Risk of fire and short circuit. The openings should be protected from foreign objects or dripping liquids.
（5）Only install the unit in a pollution degree 2 environment (Note.1).
（6）Please do not install the unit in places with high moisture or near the water.
（7）The maximum operating temperature is 60°C, please do not install the unit in places with high ambient
temperature or near fire source.
（8）Output current and output wattage must not exceed the rated value on its specification.
（9）Disconnect system from supply voltage:
Before commencing any installation, maintenance or modification work: Disconnect your system from
supply voltage. Make sure that inadvertent connection in circuit will be impossible!
（10）For continued protection against risk of fire, replace only with same type and rating of fuse.
Pour ne pas compromettre la protection contre les risqué d’incendie, remplacer par un fusible de même
type et de memes caractéristiques nominales.
Note.1: Pollution Degree 2 applies where there is only non-conductive pollution that might temporarily become
conductive due to occasional condensation. Generally refer to dry, well-ventilated locations, such as
control cabinets.
Manufacturer：
MEAN WELL ENTERPRISES Co., LTD.
No.28, Wuquan 3rd Rd., Wugu Dist.,
New Taipei City 24891, Taiwan
Tel: [phone]
Web: www.meanwell.com
Branch Office：
China
MEAN WELL (GUANGZHOU)
ENTERPRISES Co., LTD.
2F, A Building, Yuean lndustry Park,
Huangcun,Dongpu Yown, Tianhe
District, Gungzhou, China
Post Code:510660
Tel: [phone]
Web: www.meanwell.com.cn
U.S.A.
MEAN WELL USA, INC.
44030 Fremont Blvd., Fremont,
CA 94538, U.S.A.
Tel: [phone]
Web: www.meanwellusa.com
Europe
MEAN WELL EUROPE B.V.
Langs de Werf 8, 1185XT
Amstelveen, The Netherlands
Tel: [phone]
Web: www.meanwell.eu

Declaration of China RoHS Conformity
In order to reduce the impacts on the environment and take the more responsibility for protecting the
earth, MEAN WELL is confirming and announcing the conformity to China RoHS, an
Administrative Measures for the Restriction of the Use of Hazardous Substances in Electrical and
Electronic Products.
Environment Friendly Use Period Label
Observing SJT 11364-2014, Marking for the Restricted Use of Hazardous
Substances in Electronic and Electrical Products
Observing SJ/Z 11388-2009, General Guidelines of Environment-friendly
Use Period of Electronic Information ProductsAppendix B, adopting
table look-up to verify the Environment Friendly Use Period
Names and Contents of Hazardous Substances Lists
Part Name
Hazardous Substances
Lead
(Pb)
Mercury
(Hg)
Cadmium
(Cd)
Hexavalent
chromium
(Cr6+)
Polybrominated
biphenyls
(PBB)
Polybrominated
diphenyl ethers
(PBDE)
PCB and its
components
X
O
X
O
O
O
Metal structure
parts
X
O
O
O
O
O
Plastic structure
parts
O
O
O
O
O
O
Accessories
O
O
O
O
O
O
Cables
X
O
O
O
O
O
O: The concentration of the hazardous substances within the homogeneous material of that product is less than
the concentration limits set by GB/T 26572-2011.
X: The concentration of the hazardous substances within the homogeneous material of that product is over the
concentration limits set by GB/T 26572-2011; however, it follows the standard advised by 2011/65/EU.

Declaration of China VOC Conformity
In order to reduce the impacts on the environment and take the more responsibility
for protecting the earth, MEAN WELL is confirming and announcing the conformity to
China’s Standardization Administration Releases VOC Standards
Standard No. Name of the Standard
GB 30981-2020 Limit of harmful substances of industrial protective coatings
GB 33372-2020 Limits for volatile organic compounds content in adhesive
GB 38507-2020 Limits for volatile organic compounds (VOCs) In printing ink
GB 38508-2020 Limits for volatile organic compounds content in cleaning agents

Declaration of Five PBT TSCA Conformity
In order to reduce the impacts on the environment and take the more responsibility
for protecting the earth, MEAN WELL hereby confirms that MEAN WELL product
series comply with Use and Risk Management for Five PBT Chemicals under TSCA
section 6(h)
CAS No.
Substance Name
1163-19-5
Decabromodiphenyl ether (DecaBDE)
68937-41-7
Phenol, isopropylated, phosphate (3:1)
PIP (3:1)
732-26-3
2,4,6-Tris (tert-butyl) phenol (2,4,6-TTBP)
133-49-3
Pentachlorothiophenol (PCTP)
87-68-3
Hexachlorobutadiene (HCBD)