LWN1240-6EM1G - BEL POWER SOLUTIONS

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Convert Select

Features

• RoHS lead-free-solder and lead-solder-exempted

products are available

• Rugged35mmDIN-railsnap-tdesign

• Class I equipment

• Universal AC-input or DC-input (66 – 150 or 90 – 350 VDC)

with single stage conversion

• Power factor correction, harmonics IEC/EN 61000-3-2

• Virtually no inrush current

• Compliant with EMC standards EN IEC 61204-3,

EN 50121-3-2

• Emissions according to EN 55011 / 55032

• Veryhighe󰀩ciency;upto89%

• Short-term output peak power capability, rectangular

current limiting characteristic

• Single or two independently regulated outputs with

12,24,36,or48V

• Outputs no-load, overload, and short-circuit proof

• PCBs coated by protective lacquer

• Very high reliability

Table of Contents

Description............................................................................2

Model Selection ....................................................................2

Functional Description ..........................................................4

Electrical Input Data .............................................................6

Electrical Output Data...........................................................9

Electromagnetic Compatibility (EMC) ................................. 14

Immunity to Environmental Conditions ...............................17

Mechanical Data ................................................................. 19

Safety and Installation Instructions ..................................... 20

Description of Options ........................................................23

Accessories ........................................................................28

Battery Charging /Temperature Sensor ..............................29

114

4.49"

103

4.05"

138

5.43"

1 not EW

Safety-approvedtoIEC/EN62368-13rdeditionand

UL/CSA60950-12ndedition,UL508listedcomponents

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 2 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Description

The MELCHER Convert Select series represents a family of DIN-rail mountable DC-DC and AC-DC converters with power factor

correction. The converters have been designed according to the latest industry requirements and standards.

The converters are ideal for use in outdoor and other demanding applications to power building control systems, factory automation,

industrial controls, instrumentation, electromagnetic drives, fans, and other DC loads.

Di󰀨erentmodelsareavailablewithasingleoutputortwoindependentlyregulated,electricallyisolatedoutputswith12,24,36,or48V.

Specialmodelsforbatterychargingareavailable.TheEWmodelsareparticularlysuitablefor110Vrailwayapplications;theyhave

been designed in accordance with the railway standards EN 50155 and EN 50121.

Key features of the Convert Select line include power factor correction with low harmonic distortion, negligibly low inrush current, high

immunity to transients and surges, and low electromagnetic emissions. Internal protection circuits such as input over- and undervoltage

lockout,thermalprotection,aswellasoutputovervoltageprotectionbyasecondcontrolloopensuresafeoperationofthenalsystem.

The outputs deliver an electrically-isolated Safety Extra Low Voltage (ES1) and low output noise. They are no-load, overload, and short-

circuitproof.Theelectronicallycontrolledshort-termpeakpowercapabilityofupto150%oftheratedoutputpowerenablesthefront

end converters to deliver additional power to start-up motors or to safely operate subsequent circuit breakers. Built-in large sized output

capacitors absorb possible reverse energy, which may be caused by quick deceleration of electromagnetic drives connected directly to

the output. A green LED at the front cover displays the status of the output(s).

The Convert Select Series was designed according to all relevant international safety standards. The converters are approved by Nemko

andCSAandareUL508listed.Adequateclearancesandcreepagedistancesallowoperationinpollutiondegree3environment(with

AC input). All board assemblies are coated with a protective lacquer.

The thermal concept allows operation at full load up to an ambient temperature of 60 °C (LW models) or 70 °C (EW models) in free air

withoutforcedcooling.AruggedDINsnap-tdeviceallowseasyandreliablexingontothevarious35mmDINrailmodels.Theconverters

arettedwithcageclampterminalswhichareeasilyaccessiblefromthefront.Systemconnectorswithscrewterminalsforusewithpre-

assembled harnesses, external adjustment of the output voltage as well as various auxiliary functions are available as options.

The letter E stands for improved EMC performance of LW models. Models without E are obsolete.

Model Selection

Table 1: Standard models

Output 1 Output 2 Output

Power

Operating Input

Voltage

Type

Designation6E󰀩ciency Options3, 5

Vo1 nom

[VDC]

Io1 nom

[A]

Vo2 nom

[VDC]

Io2 nom

[A]

Po nom

[W] Vi min – Vi max

ηmin

[%]

12.35 7.5* - - 93*

85 2 – 264 VAC,

47 – 63 Hz 4,

90 2 – 350 VDC 7

LWR1301-6EG 383*

D1, D2, D5

M1, M2

non-G

12.35 14* - - 173* LWN1301-6EG 383*

24.7 5 - - 124 LWR1601-6EG 87

24.7 10 - - 247 LWN1601-6EG 87

37.05 3.3 - - 123 LWR1701-6EG 388

37.05 6.6 - - 245 LWN1701-6EG 3 88

49.4 2.5 - - 124 LWR1801-6EG 88

49.4 5 - - 247 LWN1801-6EG 88

12.35 7* 12.35 7* 173* LWN2320-6EG 383*

24.7 5 24.7 5 247 LWN2660-6EG 87

37.05 3.3 37.05 3.3 245 LWN2770-6EG389

49.4 2.5 49.4 2.5 247 LWN2880-6EG 89

24.7 5 - - 120 66 – 150 VDC EWR1601-0G 987 R, M1, M2, Q,

K2, non-G

24.7 5 24.7 5 240 EWN2660-0G 987

* Version 106 or higher

1 R-input not connected.

2 For derating at low input voltage see section Output Power Derating.

3 For minimum quantity and lead times contact the Company.

4 Theconvertershavebeentestedupto440Hz;operationat16 2/3 Hz is also possible, but the output ripple is slightly higher. For questions

when operating at frequencies <47 Hz or >63 Hz, consult the Company.

5 On double-output models the options R, M2, D1, D2, D5 are related to the second output only.

6 Improved EMC performance for LWN/LWR models.

7 Vi ≤ 250 VDC for models with option F

8 Min.e󰀩ciencyatVi nom, Io nom, and TA=25°C.Typicalvaluesareapprox.2%better.

9 EWN and EWR models are designed for railway applications according to EN 50155 and EN 50121.

NFND: Not for new designs.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 3 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Table 2: Battery charger models (M1 included)

Output Voltage Nominal Output Values Operating Input

Voltage

Type

Designation 6 E󰀩ciency Options 3

VBat

[VDC]

Vo safe

[VDC]

Vo max

[VDC]

Vo nom

[VDC]

Io nom

[A]

Po nom

[W] Vi min – Vi max

ηmin

[%]

12 12.84 1 14.65 13.8 7.5* 104*

85 2 – 264 VAC,

47 – 63 Hz 4,

90 2 – 350 VDC 7

LWR1140-6EM1G 3 83*

non-G

14* 194* LWN1140-6EM1G 3 85*

24 25.68 1 29.3 27.3 4.2 115 LWR1240-6EM1G 86

8.4 230 LWN1240-6EM1G 85

36 38.52 1 43.95 40.88 2.8 115 LWR1840-6EM1G

386

5.6 230 LWN1840-6EM1G

3 86

48 51.36 1 58.6 54.5 2.1 115 LWR1740-6EM1G 86

4.2 230 LWN1740-6EM1G 87

1 Setting voltage (typ.) with open R-input

2 For derating at low input voltage, see section Output Power Derating.

3 For minimum quantity and lead times, contact the Company.

4 Theconvertershavebeentestedupto440Hz;foroperatingfrequency<47Hzor>63HzconsulttheCompany.

5 Nominaloutputgures,calculatedwithacellvoltageof2.27Vat20°C.

6 Improved EMC performance.

7 Vi ≤ 250 VDC for models with option F.

8 Min.e󰀩ciencyatVi nom, Vo nom, Io nom, and TA=25°C.Typicalvaluesareapprox.2%better.

Part Number Description

L W N 2 6 60 -6 E D1 F K2 G

Input voltage range ............................................................ E, L

Series ...................................................................................W

Nominal output power

125 W ............................................................... R

250 W ............................................................... N

Number of outputs ............................................................. 1, 2

Typespecication .................................................... 000 – 999

Operational ambient temperature range TA

–40 to 60 °C .....................................................-6

 EWorcustomer-specic .............................-0, -5

Improved EMC performance .................................................E

Options Output voltage control input

1 ........................... R

Save data signal 1 ............................. D1, D2, D5

Multiple functions via

D-SUB

connector

1 . M1, M2

Built-in second fuse, input diode .................. F, Q

System connector ...........................................K2

RoHS compliant for all six substances 2 .......... G

1 Only one of these options is possible.

2 Modelswithoutthesu󰀩xG(non-Goption)donotuselead-freesolder.

Note: The sequence of options must follow the order above.

NFND: Not for new designs.

Example: LWN2660-6ED1FK2G:PowerfactorcorrectedAC-DCconverter,operatinginputvoltagerange85–264VAC,

2 electrically isolated and individually regulated outputs, each providing 24.7 V, 5 A, improved EMC performance, options D1, F, K2,

and RoHS compatible for all 6 substances.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 4 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Product Marking

Basic type designation, applicable safety approval and recognition marks, CE mark, warnings, pin designation, company logo.

Specictypedesignation,inputvoltagerange,nominaloutputvoltagesandcurrents,degreeofprotection,batchnumber,serial

number and data code including production site, version, and date of production.

Functional Description

TheWSeriesconvertersareprimarycontrolledAC-DCorDC-DCybackconverterswithaconstantswitchingfrequencyof130kHz.

Thepower-factor-correctedsingle-stepconversionoftheinputvoltagetoalowoutputvoltageresultsinextremelyhighe󰀩ciency.

Dependingupontheoutputpower,theconvertersarettedwithone(125W)ortwo(250W)powertrains.Modelswithtwopowertrains

have one or two outputs. Double-output models exhibit individually regulated power trains.

Theinputvoltageisfedviafuse,lter,andrectiertothemaintransformer,designedinplanartechnique.Theinputlterwithvery

small input capacitance generates virtually no inrush current. An input transient suppressor protects the converter against high

voltage peaks and surges. Input over- and undervoltage lockout as well as input current limitation protect the converter from operation

outsideofitsspecication.Theinputvoltagewaveformissensedbytheprimarycontrollogictoallowactivepowerfactorcorrection,

forcing the input current to follow the input voltage waveform.

Thesecondarysideofthemaintransformersuppliesviatherectierdiodealargeelectrolyticoutputstoragecapacitorproviding

for the hold-up time. Double-output models exhibit an individual control logic each. The output voltage and the output current are

measured and fed back to the primary control logic via an optocoupler. A second control loop monitors the output voltage. It disables

the output in the case of a failure in the control logic and limits the output voltage.

Built-in temperature sensors monitor the internal temperature of each powertrain. If the temperature exceeds the limit, the converter

reducestheoutputpowercontinuouslytokeepthetemperaturebelowitslimit.AgreenLEDonthefrontcoverconrmsthepresence

of the output voltage(s).

The R input (option R, M1, or M2) allows for external adjustment of the output voltage by means of a resistor or an external voltage

source. An external sensor can be connected to the R input and allows for temperature-controlled battery charging (see Accessories).

Fig. 1

Single-output converters (125 W).

Input filter

control

Output filter

control loop (ES1)

Control circuit

including

PFC and

input OVP/UVP

Vo+

Vo–

AUX

Fuse

fuse

(option F)

03103b

Shunt Shunt

Vi–

Vi+

Rectifier

EW models

have a link or a

decoupling diode

(opt. Q) in the

Vi+ line.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 5 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Input filter

Fuse

03104b

Input filter

control

Output filter

control loop

Control circuit

including

PFC and

input OVP/UVP

Vo1+

Vo1–

Shunt Shunt

Input filter

control

Output filter

control loop

Control circuit

including

PFC and

input OVP/UVP

Vo2+

Vo2–

AUX

Shunt Shunt

Vi–

Vi+

fuse

(option F)

Rectifier

EW models

have a link or a

decoupling diode

(opt. Q) in the

Vi+ line.

Fig. 2

250 W converters. The gure shows a double-output model.

For the pinout of 250 W single-output models, see g. 1 or table 13.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 6 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Electrical Input Data

General conditions:

TA = 25 °C, unless TCisspecied.

Table 4a: Input data of LW models

Input LWR LWN Unit

AC Input DC Input AC Input DC Input

Characteristics Conditions min typ max min typ max min typ max min typ max

Operating input voltage

range

Io = 0 – Io nom

Tc – Tc max

85 2264 902350485 2264 9023504

Vi nom

Rated input voltage

range 100 (230) 240 220 100 (230) 240 220

fiRated input frequency150 – 60 - 50 – 60 - Hz

IiInput current Io nom, Vi = Vi nom 0.63 0.65 1.25 1.3 A

Io nom, Vi = Vi min 1.75 1.67 3.5 3.3

Pi0 No-load input power Vi min – Vi max 1.2 0.9 1.3 1 W

Iinrush Inrush current Vi max , t > 0.1 ms 3 3 5 5 A

CiInput capacitance 5 5 6 6 µF

PF Power factor Vi nom = 230 V, Io nom 0.86 5-0.86 5-

Vi RFI

Conducted input RFI EN 55011 / 55032

Vi nom, Io nom

A, B3A, B3A, B3A, B3

Radiated input RFI A A A A

fswitch Switching frequency 130 130 130 130 kHz

1 For operating frequencies <47 Hz and >63 Hz consult the Company. The converters have been tested up to 440 Hz.

2 Output power derating at low input voltage and/or high case temperature TC (see Output power derating).

3 Models with feature E (type test with LWN1701-6EG) - peak only.

4 Vi ≤ 250 VDC for models with option F.

5 Models with 12 V output: ≥0.70 for LWR, ≥0.75 for LWN

Table 4b: Input data of EW models

Input EWR EWN Unit

DC Input DC Input

Characteristics Conditions min typ max min typ max

Operating input voltage

range

Io = 0 – Io nom

Tc – Tc max

66 150 166 150 1

Vi nom

Rated input voltage

range 110 110

VUVT Undervoltage trigger 54 60 54 60

IiInput current Io nom, Vi = Vi nom 1.25 2.5 A

Io nom, Vi = 66 V 2.2 4.4

Pi0 No-load input power Vi min – Vi max 0.8 1.3 W

Iinrush Inrush current Vi max , t > 0.1 ms 6 12 A

CiInput capacitance 2.5 4.5 µF

Vi RFI

Conducted input RFI EN 55011 / 55032

Vi nom, Io nom

A A

Radiated input RFI A A

fswitch Switching frequency 130 130 kHz

1 Vi ≤168VDCfor3s.Overvoltagetriggeradjustedto170–182V.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 7 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Output Power Derating

The output power of LW models must be decreased at low input voltage and/or powertrain temperature above 125 °C.

The powertrain temperature depends on the output power, the input voltage, and the cooling method. At low input voltage the losses

increase.Atthemaximum specied environmenttemperatureTAfree air convectioncoolingmightbe insu󰀩cient approaching

maximum ambient conditions. As a result, the output power has to be reduced according to the tables below.

Note: Themeasurementshavebeenmadebytheapprovalboardswithfreeairconvectioncoolingaccordingto62368-13rdeditionspecied

ambient temperature TAandwiththeconverterbuiltinacardboardboxaccordingtoUL508andaspeciedtemperatureoutsidetheboxTout.

The tables give a correlation between TA or Tout and the case temperature TC (measuring point TC see Mechanical Data). For models not

specied,pleasecontacttheCompany.

EW models need no derating.

Table 5a: Po derating according to UL 60950-1 2nd edition at TA = 60 °C, or according to UL 508 at Tout = 50 °C

Model Po nom TC max Derate below derate by

[W] [°C] Vi [VAC] Vi [VDC] [W/V]

LWR1601-6E 124 80 108 98 -0.67

LWN1601/2660-6E 247 89 125 115 -1.25

LWR1701-6E 123 80 125 115 -1.25

LWN1701-6E 245 90 125 115 -1.25

LWR1801-6E 124 80 98 93 -0.67

LWN1801/2880-6E 247 89 125 115 -1.25

Table 5b: Po derating according to UL 60950-1 2nd edition at TA = 50 °C, or according to UL 508 at Tout = 40 °C

Model Po nom TC max Derate below derate by

[W] [°C] Vi [VAC] Vi [VDC] [W/V]

LWR1601-6E 124 76 98 no derating -0.67

LWN1601/2660-6E 247 86 115 105 -1.25

LWR1801-6E 124 76 93 no derating -0.67

LWN1801/2880-6E 247 86 105 95 -1.25

Input Fuse and Protection

A fast-blow fuse ( Schurter F 6.3A, 5 × 20 mm), protected by a sleeve, is connected to the input L or Vi+. EW models have a

smaller fuse (250 V, 4 × 9 mm, SOC NT3 6.3A V009, UL-recognized E-39265). For DC input voltages above 250 V consult the

Installation Instructions.

Converters with option F have large fuses (F6.3A, 5 × 20 mm). The DC input voltage for converters with option F is limited to 250 V.

AVDRandasymmetricalinputlterformane󰀨ectiveprotectionagainstinputtransients.

An under- and an overvoltage lockout protect the converter, which is disabled below Vi min and above Vi max by an internally

generated inhibit signal.

Thebuilt-inbridgerectier(LWmodels)providesreversepolarityprotectionattheinputifoperatedfromDC.

EWmodelsareprotectedbythe(blowing)inputfuseinconnectionwiththebodydiodeofthemaintransistor.OptionQo󰀨ersa

serialdiode,butthisreducesthee󰀩ciencybyapprox.1%.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 8 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

E󰀩ciency

0 0.2 0.4 0.6 0.8 1

Io nom

Vi = 125 VAC Vi = 230 VAC

04071

Fig. 3

Eciency versus load (LWN2660-6)

Power Factor, Harmonics

All converters feature active power factor correction.

3 5 7 9 11 13

mA/W

04070b

Limit class D according

to IEC/EN 61000-3-2

Harm.

LWN1701-6E

0 0.2 0.4 0.6 0.8 1

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

= 125 VAC

= 230 VAC

04069a

o nom

Fig. 4

Harmonic currents at input current, measured at Vi = 230 VAC,

Io = Io nom (LWN1701-6E).

Fig. 5

Power factor versus load (LWN2660-6)

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 9 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Electrical Output Data

Table 6a: Output data of 125 Watt standard models. General conditions: TA = 25 °C, unless TA is specied; R input open-circuit

Model LWR1301 EWR / LWR1601 LWR1701 LWR1801 Unit

Characteristics Conditions min typ max min typ max min typ max min typ max

Vo nom Output voltage nominal 1Vi nom, Io nom –24.25 24.7 25.2 36.37 37.05 37.8 48.5 49.4 50.4 V

*12.27 12.35 12.43 24.55 24.7 24.85 36.82 37.05 37.28 49.1 49.4 49.7

Vo worst Output voltage range of

tolerance

Vi min – Vi max,

Io = (0.1 – 1) Io nom

12.0 12.9 24.0 25.8 36.0 38.7 48.0 51.6

Vo L Overvoltage protection 14.25* 15* 28.5 30 42.75 45 57 60

Po nom Nominal output power Vi = 100 V – Vi max 93* 124 123 124 W

Io nom Output current nominal 7.5* 5.0 3.3 2.5 A

Io L Output current limit 3Vi min – Vi max 7.58 8.6 5.1 5.7 3.37 3.8 2.53 2.9

Iop Output current boost

4typ. 1 s 11.3 7.5 5.0 3.75

Ripple & noise

EWR Vi = 110 VDC, Io nom –500 – – mVpp

LWR

Vi = 230 VAC,

= 50 Hz, Io nom

100 100 100 100

11002110021200212002

∆Vo u Static line regulation 100 V – Vi max, Io nom ±0.08 ±0.1 ±0.15 ±0.15 V

∆Vo I Static load regulation

(droop)

Vi nom

Io = (0.1 – 1) Io nom

–0.2 –0.4 –0.6 –0.8

vod Dynamic load regulation

Voltage deviation

Recovery time

Vi nom ,

= (0.5 ↔ 1) Io nom

±1 ±1.2 ±1.5 ±1.8

40 40 80 80 ms

αvo Temperaturecoe󰀩cient TC min – TC max ±0.02 ±0.02 ±0.02 ±0.02 %/K

tor Start-up time Vi = 0 → Vi nom,Io nom 700 700 700 700 ms

toh min Hold-up time Io nom,

Vo nom → 0.8Vo nom

10 6 / 15 20 25

* Converters with feature E and version ≥106

1 Setting voltage with open R-input

2 Superimposed low frequency ripple at 2 • fi

3 Rectangular current limit characteristic (continuous operation)

4 Short-termpeakpowercapability150%ofPo nom for approx. 1 s

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 10 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Table 6b: Output data of 250 Watt single-output standard models. General conditions as in table 6a

Model LWN1301 LWN1601 LWN1701 LWN1801 Unit

Characteristics Conditions min typ max min typ max min typ max min typ max

Vo nom Output voltage nominal 1Vi nom, Io nom –24.25 24.7 25.2 36.37 37.05 37.8 48.5 49.4 50.4 V

*12.27 12.35 12.43 24.55 24.7 24.85 36.82 37.05 37.28 49.1 49.4 49.7

Vo worst Output voltage range of

tolerance

Vi min – Vi max,

Io = (0.1 – 1) Io nom

12.0 12.9 24.0 25.8 36.0 38.7 48.0 51.6

Vo L Overvoltage protection 14.25* 15* 28.5 30 42.75 45 57 60

Po nom Nominal output power Vi = 100 V – Vi max 173* 247 245 247 W

Io nom Output current nominal 14* 10 6.6 5.0 A

Io L Output current limit 3Vi min – Vi max 14.1* 16* 10.1 11.4 6.7 7.6 5.1 5.7

Iop Output current boost

4typ. 1 s 21 15 10 7.5

voRipple & noise Vi = 230 VAC,

= 50 Hz, Io nom

100 100 100 100 mVpp

11002110021200212002

∆Vo u Static line regulation 100 V – Vi max, Io nom ±0.08 ±0.1 ±0.15 ±0.15 V

∆Vo I Static load regulation

(droop)

Vi nom,

= (0.1 – 1)Io nom

–0.2 –0.4 –0.6 –0.8

vod Dynamic load regulation

Voltage deviation

Recovery time

Vi nom ,

= (0.5 ↔ 1) Io nom

±1 ±1.2 ±1.5 ±1.8

40 40 80 80 ms

αvo Temperaturecoe󰀩cient TC min – TC max ±0.02 ±0.02 ±0.02 ±0.02 %/K

tor Start-up time Vi = 0 → Vi nom,Io nom 700 700 700 700 ms

toh min Hold-up time Io nom,

Vo nom → 0.8Vo nom

10 15 20 25

Table 6c: Output data of 250 Watt double-output standard models. General conditions as in table 6a

Model LWN2320 EWN/LWN2660 LWN2770 LWN2880 Unit

Characteristics Conditions min typ max min typ max min typ max min typ max

Vo nom Output voltage nominal 1Vi nom, Io nom –24.25 24.7 25.2 36.37 37.05 37.8 48.5 49.4 50.4 V

*12.27 12.35 12.43 24.55 24.7 24.85 36.82 37.05 37.28 49.1 49.4 49.7

Vo worst Output voltage range of

tolerance

Vi min – Vi max,

Io = (0.1 – 1) Io nom

12.0 12.9 24.0 25.8 36.0 38.7 48.0 51.6

Vo L Overvoltage protection 14.25* 15* 28.5 30 42.75 45 57 60

Po nom Nominal output power Vi = 100 V – Vi max 173* 247 245 247 W

Io nom Output current nominal 2 x 7* 2 x 5 2 x 3.3 2 x 2.5 A

Io L Output current limit 3Vi min – Vi max 7.1* 8.0* 5.1 5.7 3.37 3.8 2.53 2.9

Iop Output current boost

4typ. 1 s 2 x 10.5* 2 x 7.5 2 x 5.0 2 x 3.75

voRipple & noise Vi = 230 VAC,

= 50 Hz, Io nom

100 100 5 100 100 mVpp

1100 2 1100 2 1200 2 1200 2

∆Vo u Static line regulation 100 V – Vi max, Io nom ±0.08 ±0.1 ±0.15 ±0.15 V

∆Vo I Static load regulation

(droop)

Vi nom,

= (0.1 – 1) Io nom

–0.2 –0.4 –0.6 –0.8

vod Dynamic load regulation

Voltage deviation

Recovery time

Vi nom ,

= (0.5 ↔ 1) Io nom

±1 ±1.2 ±1.5 ±1.8

40 40 80 80 ms

αvo Temperaturecoe󰀩cient TC min – TC max ±0.02 ±0.02 ±0.02 ±0.02 %/K

tor Start-up time Vi = 0 → Vi nom,Io nom 700 700 700 700 ms

toh min Hold-up time Io nom,

Vo nom → 0.8Vo nom

10 6 / 15 20 25

* Converters with feature E and version ≥106

1 Setting voltage with open R-input

2 Superimposed low frequency ripple at 2 • fi

3 Rectangular current limit characteristic (continuous operation)

4 Short-termpeakpowercapability150%ofPo nom for approx. 1 s

5 EWN2660: 500 mV @ Vi = 110 VDC

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 11 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Table 7a: Output data of 125 Watt battery charger models. General conditions: TA = 25 °C, unless TA is specied; R input left

open-circuit, unless otherwise specied

Model LWR1140-6EM1 LWR1240-6EM1 LWR1840-6EM1 LWR1740-6EM1 Unit

Characteristics Conditions min typ max min typ max min typ max min typ max

Vo safe Output setting voltage 1Vi nom, Io nom 12.25 12.84 13.15 24.5 25.68 26.3 36.75 38.52 39.45 49 51.36 52.6 V

VBat Output voltage (max)

controlled by R input

Vi min – Vi max,

Io = (0.1 – 1) Io nom

14.65 29.3 43.95 58.6

Vo L Overvoltage protection 15.45* 16.25* 30.9 32.5 46.35 48.75 61.8 65

Po nom Nominal output power Vi = 100 V – Vi max 104* 115 115 115 W

Io nom Output current nominal 7.5* 4.2 2.8 2.1 A

Io L Output current limit 3Vi min – Vi max 7.58* 8.6* 4.24 4.8 2.9 3.3 2.2 2.5

Iop Output current boost

4typ. 1 s 11.3* 6.3 4.2 3.2

voRipple & noise Vi = 230 VAC,

= 50 Hz, Io nom

100 100 100 100 mVpp

11002110021200212002

∆Vo u Static line regulation 100 V – Vi max, Io nom ±0.08 ±0.1 ±0.15 ±0.15 V

∆Vo I Static load regulation

(droop)

Vi nom,

= (0.1 – 1)Io nom

–0.2 –0.4 –0.6 –0.8

vod Dynamic load regulation

Voltage deviation

Recovery time

Vi nom ,

= (0.5 ↔ 1) Io nom

±1.2 ±1.2 ±1.6 ±1.9

40 40 80 80 ms

αvo Temperaturecoe󰀩cient TC min – TC max ±0.02 ±0.02 ±0.02 ±0.02 %/K

tor Start-up time Vi = 0 → Vi nom,Io nom 700 700 700 700 ms

Table 7b: Output data of 250 Watt battery charger models. General conditions as in table 7a

Model LWN1140-6EM1 LWN1240-6EM1 LWN1840-6EM1 LWN1740-6EM1 Unit

Characteristics Conditions min typ max min typ max min typ max min typ max

Vo safe Output setting voltage 1Vi nom, Io nom 12.25 12.84 13.15 24.5 25.68 26.3 36.75 38.52 39.45 49 51.36 52.6 V

VBat Output voltage (max)

controlled by R input

Vi min – Vi max,

Io = (0.1 – 1) Io nom

14.65 29.3 43.95 58.6

Vo L Overvoltage protection 15.45* 16.25* 30.9 32.5 46.35 48.75 61.8 65

Po nom Nominal output power Vi = 100 V – Vi max 194* 230 230 230 W

Io nom Output current nominal 14* 8.4 5.6 4.2 A

Io L Output current limit 3Vi min – Vi max 14.1* 16.0* 8.48 9.6 5.69 6.4 4.3 5.0

Iop Output current boost

4typ. 1 s 21* 12.6 8.4 6.3

voRipple & noise Vi = 230 VAC,

= 50 Hz, Io nom

100 100 100 100 mVpp

11002110021200212002

∆Vo u Static line regulation 100 V – Vi max, Io nom ±0.08 ±0.1 ±0.15 ±0.15 V

∆Vo I Static load regulation

(droop)

Vi nom,

= (0.1 – 1)Io nom

–0.2 –0.4 –0.6 –0.8

vod Dynamic load regulation

Voltage deviation

Recovery time

Vi nom ,

= (0.5 ↔ 1) Io nom

±1.2 ±1.2 ±1.6 ±1.9

40 40 80 80 ms

αvo Temperaturecoe󰀩cient TC min – TC max ±0.02 ±0.02 ±0.02 ±0.02 %/K

tor Start-up time Vi = 0 → Vi nom,Io nom 700 700 700 700 ms

* Converters with feature E and version ≥106

1 Setting voltage with open R-input = Vo safe

2 Superimposed low frequency ripple at 2 • fi

3 Rectangular current limit characteristic (continuous operation)

4 Short-termpeakpowercapability150%ofPo nom for approx. 1 s

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 12 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Parallel Operation

Double-output models exhibit an independent control logic each. Both outputs can be con nected in parallel, provided that options

S(includedinM1)andRarenotused,sincetheyinuenceonlythe2nd output. The two power trains share the current due to their

output voltage droop characteristic.

Up to 3 converters with the same output voltage may be operated in parallel. It is possible to parallel W Series with X Series

converters.

Reasonable current sharing is achieved by the droop characteristic. Correct mode of operation is highly dependent upon the wiring

of the converters and the impedance of these wires. Use wires with equal length and equal cross sections of min. 1.5 mm 2. The

bestresultsforparalleloperationcanbeachievedwiththewiringshowning.6.

Parallel operation of single-output models using the option R (output voltage adjust) is possible, but not recommended. Refer to

g.6;theconnectionsbetweenthepins8and9(bothVo–)shouldbeasshortaspossible.

Note: Parallel operation is not possible, if a temperature sensor is connected, as the sensor eliminates the output voltage

droop.

Note: For ORing diodes, we recommend to use Schottky diodes, mounted on a common heatsink to avoid thermal run

away (or the use of double diodes).

Vo+ 2

Vo+ 3

Vo- 4

Vo- 5

Vo- 8

Vo- 9

Vo+ 6

Vo+ 7

AUX 10

Vo+ 2

Vo+ 3

Vo- 4

Vo- 5

Vo- 8

Vo- 9

Vo+ 6

Vo+ 7

AUX 10

Vo+ 2

Vo+ 3

Vo- 4

Vo- 5

Vo- 8

Vo- 9

Vo+ 6

Vo+ 7

AUX 10

Load

11054b

Additional wiring for output currents Io ≥ 10 A

Additional wiring, if using the R-input

Fig. 6

Wiring for single-output converters connected in parallel.

Additional wiring for higher output currents and with the use of option R is shown.

Series Connection

Series connection of several outputs up to 150 V is possible. Exceeding an output voltage of 60 V, the output is not ES1.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 13 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Output Characteristic and Protection

Theoutputcharacteristic,individualforeachpowertrain,isrectangularwithadrooptoeaseparalleloperation;seeg.7.

However,a50%higheroutputcurrentispossibleforashorttime,suchallowingstart-upofloadsorchargingofcapacitors;seeg.8.

Each output is independently protected against internal overvoltage by means of a second control loop. When the output voltage

exceeds Vo L, the respective output is disabled.

0.8

1.0

0.6

0.4

0.2

000.20.40.60.81.01.2

o nom

05181a

1.4

1.6

1.2

1.0

0.8

0.6

-- 0.5 0.5 1.5 2.5 s

/ I

o nom

05194b

012

Fig. 7

Vo versus Io (single-output model, typical values).

Fig. 8

Short term peak power characteristic: overcurrent versus

time (typical values).

Overtemperature Protection

A built-in temperature sensor protects each powertrain is independently protected against over temperature. When a certain

temperature is reached, the concerned powertrain reduces its output power continuously.

Thermal Considerations

Thethermalconditionsareinuencedbyinputvoltage,outputcurrent,airow,andtemperatureofsurroundingcomponents.

TA max is therefore, contrary to TC max, an indicative value only.

Caution: The installer must ensure that under all operating conditions TC remains within the limits stated in the table

Temperature specications.

Note: Su󰀩cientforcedcoolingallowsTA to be higher than TA max provided that TC max is not exceeded. It is recommended that continuous

operation under worst case conditions of the following 3 parameters be avoided: Minimum input voltage, maximum output power, and

maximum temperature.

Battery Charging and Temperature Sensor

The battery charger models exhibit the option M1 and have been designed to charge lead-acid batteries. The R-input allows for

connectingabattery-specictemperaturesensor,whichprovidestemperaturecontrolledadjustofthetricklechargevoltage.

Thisoptimizeschargingaswellasbatterylifetime.Dependinguponthecellvoltageandthetemperaturecoe󰀩cientofthe

battery,di󰀨erentsensortypesareavailable;see Accessories.

Note: Parallel operation is not possible, if the temperature sensor is connected to the paralleled outputs Vo+, as the sensor eliminates the

output voltage droop.

However, it is possible to insert bleeding resistors in the Vo+ output lines of each converter in order to create a droop of approx. 0.6 V @

Io nom for 24 V outputs (1.2 V @ Io nomfor48Voutputs),butthiscreatesconsiderablepowerlosses.

2.10

2.15

2.20

2.25

2.30

2.35

2.40

2.45

Cell voltage [V]

–20 –10 0 10 20 30 40 50 °C

06139b

VC = 2.27 V, –3 mV/K VC = 2.27 V, –3.5 mV/K

VC = 2.23 V, –3 mV/K VC = 2.23 V, –3.5 mV/K

Vo safe

Power

supply

Load

–

Input Vo–

Temperature sensor



03099d

Battery

Vo+

Fig. 9

Trickle charge voltage versus temperature for dierent tem-

perature coecients (Vo safe with disconnected sensor)

Fig. 10

Schematic circuit diagram of a system with battery backup

and temperature-controlled charging.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 14 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Electromagnetic Compatibility (EMC)

Compliant with EMC standards EN IEC 61204-3 / EN 50121-3-2.

Electromagnetic Immunity

TheWSerieshasbeensuccessfullytestedtothefollowingspecications:

Table 8: Electromagnetic immunity (type tests)

Phenomenon Standard Level Coupling mode 1Value

applied

Waveform Source

imped.

Test procedure In

oper.

Perf.

crit. 2

Electrostatic

discharge

(to case)

IEC/EN

61000-4-2

4 3contact discharge 8000Vp1/50 ns 330Ω 10 positive and

10 negative

discharges

yes A

air discharge 15000 Vp

Electromagnetic

eldRF

IEC/EN

61000-4-3

3 4antenna 10 V/m 4AM80%,

1 kHz sinusoidal

N/A 80–1000MHz yes A

ENV 50204 3 antenna 10 V/m 50%dutycycle,

200 Hz repet. frequ.

N/A 900 ± 5 Mhz yes A

IEC/EN

61000-4-3

(EW models)

5 antenna 20 V/m AM80%,

1 kHz sinusoidal

N/A 80–1000MHz yes A

10 V/m 1400 – 2100 MHz

5 V/m 2100 – 2500 MHz

Electrical fast

transients/burst

IEC/EN

61000-4-4

3 capacitive, o/c ±2000 Vpbursts of 5/50 ns

5kHzover15ms;

burst period: 300 ms

50Ω 60 s positive

60 s negative

transients per

coupling mode

yes A

3 6±i/c, +i/–i

direct coupling

±2000 Vp

Surges IEC/EN

61000-4-5

3 7+i/c, – i/c ±2000 Vp1.2 / 50 µs 12Ω 5 pos. & 5 neg.

surges per

coupling mode

yes B

+i/– i ±1000 Vp1.2 / 50 µs 2Ω

Conducted

disturbances

IEC/EN

61000-4-6

3 8i, o, signal wires 10 VAC

(140 dBµV)

AM80%

1 kHz

150Ω 0.15–80MHz yes A

Power frequency

magneticeld

IEC/EN

61000-4-8

– – 100 A/m 50 and 60 Hz – x, y, and z axis yes A

Surges

(EW models)

IEC/EN

50155:2001

wave

A 9

+i/c, – i/c 1800Vp5/50 µs 5Ω 5 pos. and 5

neg. pulses

yes A

1 i = input, o = output, c = case.

2 A=Normaloperation,nodeviationfromspecications,B=Normaloperation,temporarylossoffunctionordeviationfromspecs.possible.

3 Exceeds EN 50121-3-2:2006 table 9.3 and EN 50121-4:2006 table 1.4.

4 EW models: 20 V/m, which corresponds to EN 50121-3-2:2006 table 9.1 and exceeds EN 50121-4:2006 table 1.1.

5 EW models only. Corresponds to EN 50121-3-2:2006 table 9.2 and EN 50121-4:2006 table 1.2 (compliance with digital mobile phones).

6 Corresponds to EN 50121-3-2:2006 table 7.2 and EN 50121-4:2006 table 2.2.

7 Complies with EN 50121-3-2:2006 table 7.3 and EN 50121-4:2006 table 2.3.

8 CorrespondstoEN50121-3-2:2006table8.1andEN50121-4:2006table3.1(radiofrequencycommonmode).

9 Corresponds to EN 50121-3-2:2000. Covers EN 50155:1995, RIA12, direct transients, waveform D (EW models only).

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 15 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Emissions

Table 9: Electromagnetic emissions for LW models with feature E: (type tests with LWN1701-6EG)

Phenomenon Standards Conditions Results

Harmonics EN 61000-3-2:2006 Vi = 230 V, Vo nom, Io nom Class A, D

Voltageuctuationandicker EN 61000-3-3 + A2:2005 Vi = 230 V, Vo nom, Io nom Complied

Note: An external toroid ferrite core across the input lines reduces the emissions considerably.

Fig. 11a

Conducted emissions of LW models with feature E:

Disturbances at the phase input according to EN 55032,

measured at Vi nom and Io nom. (LWN1701-6EG)

Fig. 11b

Radiated emissions measured according to EN 55032 for

LW models with feature E

(LWN1701-6EG), antenna 3 m distance, horizontal polarized)

PMM 8000 PLUSLimit: 61204bqp Detector: Peak, conducted Vi+, 6.6.06

EWN2660-0 Ui=110VDC, Io=10A, outputs in parallel configuration

EN 55011 B

dBµV

0.2 0.5 1 2 5 10 20 MHz

JM008

JM038a

30 50 100 200 500 1000 MHz

dBµV/m

TÜV-Divina, ESVS 30:R&S, BBA 9106/UHALP 9107:Schwarzb., QP, 2006-05-29

Testdistance 10 m, EWN2660-0 Ui=110 V, Uo=24 V Io= 2 x 5 A

EN 55011 A

<25 dbµV/m

Fig. 12a

Conducted emissions of EW models:

Disturbances (peak) at the phase input according to

EN 55011, measured at Vi nom and Io nom. (EWN2660-0)

Fig. 12b

Radiated emissions of EW models, measured at Vi nom, Io nom,

accord. to EN 55011, antenna 10 m distance, (EWN2660-0)

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 16 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

External EMC Filter for Models with Feature E

AnexternalEMCltercanbeconnectedtotheinputslinesoftheconverter.However,asmallchokehastobeincludedin

thephaselinetoavoidinterferencesbetweentheinternalandexternallter,whichwouldcausedramaticallyincreasedlow

harmonics.

ThegurebelowshowstheusedexternalltercongurationconsistingoftheinletlterKMF1.1241.11(4A,Schurterwww.schurter.com)

andthedecouplingchokeEPCOSB82111B0000C018,11µH,4A,6× 20 mm.

Note: ThislterallowsforconnectionofanIECinletandisavailablewith1or2incorporatedfuses.AsimilarlterwithAMPterminals(6.3× 20 mm)

isalsoavailable(SchurterFMLB5500.2028).

Converter

PE'PE

Choke

JM007

Fig. 13a

External lter to reduce conducted emissions of LW models

with feature E (L1 = L2 = 1.6 mH, Cx = 47 nF, Cy = 2.2 nF)

Fig. 13b

External inlet lter

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 17 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Immunity to Environmental Conditions

Table 10: Mechanical stress and climatic

Test method Standard Test Conditions Status

Cab Damp heat steady

state

IEC/EN60068-2-78

MIL-STD-810Dsection507.2

Temperature: 40 ±2 °C Converter

not operating

Relative humidity: 93 +2/-3 %

Duration: 56 days

Kb Salt mist, cyclic

(sodium chloride

NaCl solution)

IEC/EN60068-2-52 Concentration: 5%(30°C) Converter

not operating

Duration: 2 h per cycle

Conditions: 40°C,93%rel.humidity

Storage Duration: 3 cycles of 22 h

Eb Bump

(half-sinusoidal)

IEC/EN60068-2-29

MIL-STD-810Dsect.516.3

Acceleration amplitude: 25 gn = 245 m/s2Converter

not operating,

wall mounted 1

Bump duration: 11 ms

6000 bumps: 1000 in each direction

Acceleration amplitude: 10 gn=98.1m/s2Converter

not operating,

on DIN-rail 2

Bump duration: 11 ms

6000 bumps: 1000 in each direction

Fc Vibration

(sinusoidal)

IEC/EN60068-2-6

MIL-STD-810Dsect.514.3

Acceleration amplitude: 0.35 mm (10 – 60 Hz) Converter

operating,

wall mounted 1

Frequency (1 Oct/min): 5 gn = 49 m/s2 (60 – 2000 Hz)

Test duration: 7.5 h (2.5 h each axis)

Acceleration amplitude: 0.25 mm (10 – 60 Hz) Converter

operating,

on DIN-rail 2

Frequency (1 Oct/min): 2 gn = 19 m/s2 (60 – 2000 Hz)

Test duration: 7.5 h (2.5 h each axis)

Ea Shock

(half-sinusoidal)

IEC/EN60068-2-27

MIL-STD-810Dsect.516.3

Acceleration amplitude: 50 gn = 490 m/s2Converter

not operating,

wall mounted 1

Bump duration: 11 ms

Number of bumps: 18(3ineachdirection)

Shock EN 50155/EN 61373 3

sect. 10, class A and B

body mounted 4

Acceleration amplitude: 5.1 gnConverter

operating,

on DIN-rail 2

Bump duration: 30 ms

Number of bumps: 18(3ineachdirection)

Fh Random vibration

broad band, digital

control & guidance

IEC/EN60068-2-64 Acceleration spectral density: 0.05 gn

2/Hz Converter

operating,

wall mounted 1

Frequency band: 8– 500 Hz

Acceleration magnitude: 4.9 gn rms

Test duration: 3 h (1 h each axis)

Fda Random vibration

wide band, high

reproducibility

IEC/EN60068-2-35 Acceleration spectral density: 0.01 gn

2/Hz Converter

operating,

mounted on

DIN-rail 2

Frequency band: 20 – 500 Hz

Acceleration magnitude: 2.2 gn rms

Test duration: 1.5 h (0.5 h each axis)

Simulated long

life time testing at

increased random

vibration levels

EN 50155 /EN 61373 3

sect.8and9,classB

body mounted 3

Acceleration spectral density: 0.01 gn

2/Hz Converter

operating,

mounted on

DIN-rail 2

Frequency band: 5 – 150 Hz

Acceleration magnitude: 0.8gn rms

Test duration: 1.5 h (0.5 h each axis)

1 Wall-mountedwithbracketsUMB-W[HZZ00618];see Accessories

2 FastenedonaDIN-railwith2additionalDIN-railxingbracketsDMB-EWG,see Accessories. This covers also wall-mounting with brackets,

because wall mounting performs better in vibration test.

3 EW models (railway standards)

4 Body mounted = chassis of a railway coach

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 18 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Temperatures

Table 11: Temperature specications, valid for an air pressure of 800 - 1200 hPa (800 - 1200 mbar)

Model LW models -6 EW models -0 Unit

Characteristics Conditions min max min max

TAAmbient temperature Converter operating1–40 60 –40 70 3°C

TCCase temperature 2–40 90 2–40 90 3

TSStorage temperature Non operational –40 100 –40 100

1 See Thermal Considerations

2 See table 5 Po derating

3 Mounted in vertical position

Failure Rates

Table 12: MTBF

Values at specied

case temperature

Module types Ground benign

40 °C

Ground xed Ground mobile

50 °C

Unit

40 °C 70 °C

MTBF 1 LWR1xxx 892000 180000 197 000 68000 h

LWN1xxx 644 000 131 000 72 000 51 000

LWN2xxx 522 000 101 000 55 000 38000

1 Calculated in accordance with MIL-HDBK-217E, notice 2.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 19 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Mechanical Data

138 (5.43")

106.6 (4.2")

113.6 (4.47")

15 (0.59")

122.8 (4.84")

103 (4.05")

33 (1.3")

49 (1.93")

09107c

108 (4.25")

Wall mounting

brackets

(accessories)

Measuring point for

case temperature T

Option M

(female connector)

13 (0.51")

31 (1.22")

29.4 (1.16")

43 (1.69")

LED

European

Projection

z axis

(vertical)

x axis

40 (1.6")

Option M

(female connector)

D-SUB Male

connector

Dimensions in mm.

Fig. 14

Case W01

EWN/LWN: weight approx. 1400 g

EWR/LWR: weight approx. 1200 g

Case designed by ATP, Munich.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 20 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Safety and Installation Instructions

Terminal Allocation

Theterminalallocationtablesdenetheelectricalpotentialoftheconverters.

10066

13 5 7911

10067

24 6 810

Fig. 15a

View of the input terminals (cage clamp style)

Fig. 15b

View of the output terminals (cage clamp style)

Table 13a: Input terminals of LW models Table 13c: Terminal allocation output side

Pin no. Pin designation Electrical determination

1 Protective earth PE

2 N

Input neutral, DC negative

3 L

Input phase, DC positive

Pin no. Pin des. Single output Double output

1 Functional earth

to load

Functional earth

to load

2 + Output positive Output 1 positive

3 + Output positive Output 1 positive

4 – Output negative Output 1 negative

5 – Output negative Output 1 negative

6 + Output positive Output 2 positive

7 + Output positive Output 2 positive

8– Output negative Output 2 negative

9 – Output negative Output 2 negative

10 AUX Option Option

11 Functional earth

to load

Functional earth

to load

Table 13b: Input terminals of EW models

Pin no. Pin designation Electrical determination

1 Protective earth PE

2Vi- Input negative

3Vi+ Input positive

Installation Instructions

The converters of the W Series are components, intended exclusively for inclusion within other equipment by professional

installers. Installation must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage,

clearance, casualty, markings and segregation requirements of the end-use application.

DIN-rail mountingispossiblewiththebuilt-insnap-tdeviceonaDIN-rail.Thisfulllsthemechanicaltransportrequirements

as per ETSI 300019-1-2, class 2 (vertical).

TofullltherequirementsofIEC721-3-2,class2.1(vertical),2additionalxingbracketsHZZ00624-G(see Accessories) must

bettedonthebottomsideoftheDIN-rail.Forheavydutyrailwayapplications,werecommendinstallingall4xingbrackets

HZZ00624-G.

Chassis or wall mountingispossibleusingtheuniversalchassis-mountingbracketsHZZ00618-G(see Accessories). Such

installa tion complies with IEC 721-3-2, class 2.2 (vertical and horizontal).

Caution:Installtheconvertersvertically,andmakesurethatthereissu󰀩cientairowavailableforconvectioncooling.Theminimumspace

to the next device should be: top/bottom: 30 mm, left/right: 20 mm.

The converters of the W Series are class I equipment: Input terminal 1 ( ) and the output terminals 1 and 11 ( ) are reliably

connected to the case. For safety reasons it is essential to connect the input terminal 1 ( ) with protective earth. Output

terminals 1 and 11 can be used to connect the output voltage(s) or the load to functional earth.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 21 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

10073

10072

Fig. 16a

Snap-t mounting to DIN-Rail.

Fig. 16b

Dismounting from DIN-rail. Use proper tool

(min. 3 mm screwdriver) and adequate force.

1007

Fig. 17

Cage clamp terminals. Use 0.5 to 2.5 mm2 (AWG 20 to 12) solid or stranded wires depending on local requirements.

The phase input (L

orVi+)isinternallyfused;seeInput Fuse. This fuse is de signed to break an overcurrent in case of a

malfunction of the converter and is not customer-accessible.

External fuses in the wiring to one or both input lines (L

and/or N

) may be necessary to ensure compliance with local

requirements. A built-in second fuse in the neutral path is available as option F.

A second fuse in the wiring to the neutral terminal N

or option F is needed if:

• Local requirements demand an individual fuse in each source line

• Neutralandearthimpedanceishighorundened

• Phaseandneutralofthemainsarenotdenedorcannotbeassignedtothecorrespondingterminals(L

to phase and N

to neutral).

Models with Option F: Caution! Double-pole/neutral fusing.

If the converters operate at source voltages above 250 VDC, an external fuse or a circuit breaker at system level should be installed.

Caution:

• Installation must strictly follow the national safety regulations.

• Do not open this apparatus!

Protection Degree and Cleaning Liquids

TheprotectiondegreeoftheconvertersisIP20.Protectivecoversoverinputandoutputterminalsareavailableonrequest;

see Accessories.

Any penetration of liquid or foreign solid objects is to be prevented, since the converters are not hermetically sealed.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 22 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Standards and Approvals

TheconvertersoftheLWSerieswithfeatureEweresafety-approvedtoIEC/EN62368-13rdeditionandUL/CSA60950-12nd

edition(modelswithoutE:IEC/EN62368-13rdedition),IEC61010-1:C11:2002(modelswithoutE:IEC61010-1),and

EN50178:1997(withandwithoutE).

TheconvertersareUL508-listedcomponents.

TheEWmodelsaresafety-approvedtoIEC/EN62368-13rdeditionandUL/CSA60950-12ndedition

The converters have been designed in accordance with said standards for:

• Class I equipment

• Power supply for building-in, vertical mounting on 35 mm DIN-rail or on a wall

• Overvoltage category II (III for 110 VAC supply)

• Basic insulation between input and case, based on 250 VAC

• Double or reinforced insulation between input and output, based on 250 VAC and 350 VDC.

• Functional insulation between outputs and case.

• Functional insulation between outputs.

• Pollution degree 3 environment (AC-input) and degree 2 (DC input).

The converters are subject to manufacturing surveillance in accordance with the above mentioned standards and with ISO9001:2015.

Operation at Frequencies Greater 60 Hz

The LW Series converters have been tested for operation up to 440 Hz. However, the Y and X caps are not approved to such

frequency. The leakage currents are higher than at 60 Hz, whereas the output ripple voltage is lower.

Leakage Currents with AC Supply

LeakagecurrentsowduetointernalleakagecapacitanceandRFIsuppressionY-capacitors.Thecurrentvaluesare

proportionaltothemainsvoltageandnearlyproportionaltothemainsfrequency.Theyarespeciedatmaximumoperatinginput

voltage where phase, neutral, and protective earth are correctly connected as required for class I equipment.

Leakage current may exceed 5 mA, if fi > 63 Hz.

Railway Applications

The W Series converters have been designed observing the railway standards EN 50155 and EN 50121. All boards are coated

with a protective lacquer.

The EW Series is particularly suitable for connection to 110 V railway batteries.

Isolation

TheelectricstrengthtestisperformedinthefactoryasroutinetestinaccordancewithEN62911andIEC/EN62368-13rd

editionandshouldnotberepeatedintheeld.TheCompanywillnothonorwarrantyclaimsresultingfromincorrectlyexecuted

electricstrengtheldtests.

Table 14: Isolation

Characteristics Input to Case

and Output(s)

Output(s) to Case Output 1 to Output 2

and AUX

Unit

Electric strength test Factorytest≥1s 2.8 1 1.4 0.5 kVDC

AC test voltage equivalent

to factory test

2.0 1.0 0.35 kVAC

Insulation resistance >300 2 >300 2 >100 MΩ

1 InaccordancewithIEC/EN62368-13rdedition,subassembliesarepretestedwith4.2kVDC.

2 Tested at 500 VDC.

LED Indicator

A green LED is activated, when the output voltage Vo is within the normal operating tolerance band.

Note: This LED is also activated, when the converter is not powered by the input, but a loaded battery is connected to the output.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 23 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Safety of Operator-Accessible Output Circuits

Iftheoutputcircuitofaconverterisoperatoraccessible,itshallbeaES1circuitaccordingto62368-13rdeditionrelatedsafety

standards.

The converters have ES1 output circuits up to an output voltage of 57.5 V. However, if the isolated outputs are connected to

another voltage source or connected in series with a total of >57.5 V the outputs are hazardous.

It is the sole responsibility of the installer to ensure the compliance with the relevant and applicable safety regulations.

Description of Options

E designates LW models with improved EMC per formance. Refer to the EC Declaration of Conformity. Feature E is standard for

new designs.

Single options D1, D2, D5, R are available (as single choice options) on the AUX terminal (10), referenced to Vo–.

Option M1 and M2 designate a combination of several options accessible via a D-SUB connector. Option M1 includes the

function SD (shutdown).

Note: In double-output models, the options D1, D5, R, and SD concern only output 2.

Single Options Using the AUX Pin

Theconnectionisshowninthegurebelow.ForthedescriptionrefertoAdjustment of Vo or Vo2 (next section).

AUX

Adjustment with V

ext

06142b

AUX

Adjustment with R

ext

Vo2+

or Vo+

Vo2–

or Vo–

ext1

ext2

ext

Vo2–

or Vo–

Fig. 18

Connection of adjust resistors or an external voltage source to adjust the output voltage Vo or Vo2 (option M1 or M2 not tted)

Multiple Options M1 or M2 via D-SUB Connector

The option board is suitable for applications, where several options are needed. Option M1 is standard for battery charger

models, option M2 is suitable for applications without battery or for simple applications with battery.

Table 15: Pin allocation of the 9 pin D-SUB connector

Pin Designation Description

1 GND11System ground / common signal return

2 R R input 3

3 VCC2Positive supply voltage (≈ output 2)

4 D1 Output voltage monitor Vo low D1

5 D5 Output 2 voltage monitor Vo low D5

6 SD Shutdown3

7 D-adj Adjustment of threshold values of D1 or D5

8D2 Input voltage monitor Vi low

9 Sys-OK System okay (all outputs are okay)

1 Do not connect GND1 (pin 1) with the neg. output (–)

2 Do not connect VCC (pin 3) with the positive output (+)

3 In double-output models, R, D1, D5, SD concern output 2 only.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 24 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Table 16a: Option board M1 Table 16b: Option board M2

Function Description

ROutput voltage adjust 1

D1 Output voltage monitor Vo low D1

D2 Input voltage monitor Vi low

D5 Output 2 voltage monitor 1

(battery deep discharged): Vo low D5

Sys-OK System okay

SD Shutdown1

D-adj Adjustment of trigger values D1 and D5

1 In double-output models, only output 2 is concerned.

Function Description

ROutput voltage adjust 1

D2 Input voltage monitor Vi low

D5 Output voltage monitor 1

(battery deep discharged): Vo low D5

D-adj Adjustment of trigger values D1 and D5

1 In double-output models, only output 2 is concerned.

D2: Input Voltage Monitor (Power Fail)

D2 monitors the input voltage Vi. When Vi drops below 65±3 VAC or 92 VDC, the D2 signal output is high impedance (open-

collector, max. 50 V).

When Vi is greater then said level, the signal output D2 is conducting: VD2 < 1.5 V, ID2 max < 50 mA. D1: Output Voltage Monitor.

1234

789

Power-Fail

D-SUB (female)

06141b

Vo2+

or Vo+

1234

789

Power-Fail D2

D-SUB (female)

VCC

06140b

AUX

Vo2+

or Vo+

Fig. 19

Option D2: Examples of relay control to monitor a power failure.

D1: Output Voltage Monitor

D1isintendedformonitoringthebusvoltageofabattery-bu󰀨eredsystem.Itindicatesthatthesystemispoweredfromthe

batteryandcanforinstancebeusedasawarningsignalortoswitcho󰀨apartoftheload.WhentheoutputvoltageVo (or Vo2) is

greater than Vo low D1speciedintable17,theD1signaloutputisconducting:VD1 < 1.5 V, ID1 max < 50 mA.

When Vo islower,theD1signaloutputishighimpedance(open-collector,max.58.6V).Indouble-outputmodels,D1monitors

only output 2 (Vo2).

Inapplicationswithoutbattery-bu󰀨eringtheD1signalmaynotbesuitable,sincesmallerdynamicloadchangesmaycauseD1

totrigger.Forsuchapplications,D5withatriggerlevelofapprox.85%ofVo nom should be chosen (e.g., for a bus voltage of 24.7

V: trigger level at 21 V).

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 25 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

D5: System Voltage Monitor (Battery Low)

D5 monitors the output voltage Vo (Vo2 in double-output models) or the lowest admissible voltage of a connected battery (battery

deepdischarge).ThedenitionofD5issimilartoD1,butthetriggerlevelislower.WhenVo (or Vo2) is greater than Vo low D5

speciedintable17,theD2signaloutputisconducting:

VD5 < 1.5 V, ID5 max < 50 mA.

When Vo islower,theD5signaloutputishighimpedance(open-collector,max.58.6V).Indouble-outputmodels,D5monitors

only output 2 (Vo2).

In systems without battery support, D5 signals that Vo (or Vo2 ) is going to drop below a safe value.

Inbattery-bu󰀨eredsystems,D5indicatesthatthebatteryhasreacheditsdeepestdischargelevelpriortogettingdamaged.

TheD5signalcanbeusedforinstancetodisableloads,savedata,ortostartacontrolledswitch-o󰀨ofrunningprocesses.

Table 17: Options D1 and D5: Trigger and switch-on levels

Model Battery VBat

[V]

Vo low D1 Vo low D 5

trigger [ V] switch on [ V] trigger [ V] switch on [ V]

LWR/LWN1140 12 11.5 12.1 10.5 12.1

LWR/LWN1240 24 23 24.2 21 24.2

LWR/LWN1840 36 34.4 36.3 31.5 36.3

LWR/LWN1740 48 46 48.4 42 48.4

Adjustment of Threshold Levels (D1/D5)

Pin7oftheD-SUBconnectorallowsforadjustmentofthethresholdlevelsofD1andD5.Bothlevelsareinuencedbythevoltage

divider Rx / Ry . Resistor Rx to pin 3 (VCC) lowers the levels, whereas Rytopin1(GND1)increasesthem(seeg.20).

1234

789

D-SUB (female)

06148b

Change threshold

VCC GND1

D-adj

Fig. 20

Wiring to adjust both threshold levels of option D1 or D5

SD: Shutdown

Reduces the output power to approx. 1 W, but the converter is not fully disabled. In a no-load condition, Vodropsbelow6.2V;see

g.21.Indouble-outputmodels,onlyoutput2isinuenced.

05175b

0 0.2 0.4 0.6 0.8 1.2

Output current

Output voltage

Table 18: Shutdown conditions

Voltage VSD on

shutdown pin

Result

< 0.7 V Converter disabled (Po approx. 1 W)

≥2.0 V or open Converter enabled

Fig. 21

Output voltage versus output current, while the shutdown is

activated (Vi = Vi nom).

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 26 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Sys-OK: Status

This function allows in a battery charger application for checking, whether the output is correctly following the external control

signal at the R-input (coming for instance from the temperature sensor). The logic is shown in table 19.

Table 19: System OK (M1 with external battery sensor)

System Status Input Vcontrol

sensor signal

VBat

theoretical

VBat

measured

Sys-OK

Output

System OK OK 2.7 V 27 V 27 V Low ohmic

Battery overcharged / temp. sensor defect / control voltage to high OK 2.7 V 27 V 28V High ohmic

Overload, converter cannot follow the control signal OK 2.7 V 27 V 24 V High ohmic

Output does not follow control signal, since battery would be overcharged OK 3.0 V 30 V 27 V High ohmic

System OK OK 2.5 V 25 V 25 V Low ohmic

R: Adjustment of Vo or Vo2

TheRinputallowsexternaladjustmentoftheoutputvoltageintherangeof50%to110%Vo nom. Double-output models allow only

adjustmentofoutput2(connectedtotheterminals6,7,8and9).Thisenablesasymmetricoutputvoltageconguration.

Adjustment can be achieved via a resistor or an external voltage source (in the range of 1.25 – 2.75 V).

Note: If the R input is not connected: Vo or Vo2 ≈ Vo nom.

a) Adjustment by an external resistor:

Resistor Rext1,connectedbetweenR(pin2)andGND1(pin1)oftheD-SUBconnectororaccordingtog.20.

Vo = 50 –100%Vo nom. Rext1

≈ 4 kΩ • –––––––––

Vo nom – Vo

Resistor Rext2,connectedbetweenR(pin2)andVCC(pin3)oftheD-SUBconnectororaccordingtog.20.

Vo – 2.5 V

Vo = 100 –110%Vo nom. Rext2 ≈ 4 k Ω • –––––––––––––––

2.5 V•(Vo/Vo nom –1)

Note:IftheRfunctionisnotincludedinM1orM2,refertogure20howtoconnectRext1 or Rext2 .

b) Adjustment by an external control voltage Vext (1.25 – 2.75 V), connected between R (pin 2) and GND (pin 1) of the D-SUB

connectororaccordingtog.20.

Vo Vext

Vext ≈ 2.5 V • ––––– Vo ≈ Vo nom • ––––

Vo nom

2.5 V

Caution: To prevent damage, Vext should not exceed 3 V, nor be negative.

Note: If longer wires are used to connect the R input at the D-SUB connector, the wiring to pin 1 (GND1) should be done as star point

connection.Ifwireddi󰀨erently,theoutputvoltagesettingmaybeadverselya󰀨ected.

In battery charging systems, an external battery temperature sensor (see Accessories) can be connected to optimize Vo. However,

adjustment using the R input (pin 2 of D-SUB) is possible as well. The above shown formulas are valid, but Vo nom stands for the

voltage with open R input (= Vo safe).

F: Built-in Second Fuse

A built-in second fuse in the neutral line provides safe phase-to-phase connection at low mains voltages

(e.g.,USA120V/208V/ 60Hzsystems).

The built-in second fuse also enables safe connection to the mains, where phase and neutral are not dened or cannot be

identied,ase.g.,inthecaseofplugandsocketconnectiontothemainsviaGermanSchuko-plugs;seealsoSafety and Installation

Instructions.

Option F limits the DC input voltage to ≤ 250 V.

Q: Reverse Polarity Protection

EWmodelshavenobridgerectierattheinput.Toprovidereversepolarityprotection,anadditionaldiodecanbetted.However

thislowersthee󰀩ciencybyapproximately1%.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 27 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

K2: System Connectors

For installation in systems using pre-assembled harnesses the converters are available with system connectors.

They are UL-listed, approved for currents up to 15 A at –40 to 105 °C.

The mating system connectors with screw terminals and retainers are delivered together with every converter with option K2. Use

max. 2.5 mm2 (AWG 12) solid or stranded wires, or max. 1.5 mm2 (AWG 14) stranded wires with crimp termination, stripped length

6 mm. Tightening torque of input/output terminals: max. 0.79 Nm (7 lbs.in.).

Fig. 22

System connectors Option K2

G: RoHS

RoHS compliant for all six substances.

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 28 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Accessories

Shock-Resistant Wall Mounting

SetofwallmountingbracketsHZZ00618-G(UMB-W)

Content: 2 clamps, 4 countersunk screws M4, washers,

and spring washers

DIN-Rail Fixing Brackets HZZ00624-G

For DIN-Rail vibration-proof fastening, use a set of brackets

HZZ00624-G (DMB-EWG). For heavy-duty application 2 sets

( = 4 brackets) are pre ferable.

33 ±0.5

4.2

12055

10068

Fig. 23

Wall mounting with mounting brackets HZZ00618-G

Fig. 24

DIN-rail xing bracket HZZ00624-G (DMB-EWG)

Protective Covers over Terminals

Protective covers are available to avoid touching of the terminals. HZZ01219-G and HZZ01219A-G (protective covers with cut-

outs) contains in a bag a plastic cover with length A = 26.5 mm for the primary terminals and a second one with length A = 59 mm

forthesecondaryterminals;seeguresbelow.

Content: 2 covers to protect the input and output terminals.

Fig. 25a

Protective covers HZZ01219-G

Fig. 25b

Protective covers with cut-outs HZZ01219A-G

tech.support@psbel.com

belfuse.com/power-solutions

BCD20020-G Rev AF, 26-Jan-2021

Page 29 of 29

W Series

125, 250 Watt AC-DC and DC-DC DIN-Rail Converters

Battery Temperature Sensor

Tochargelead-acidbatteriesaccordingtotheirtemperaturedi󰀨erenttypesoftemperaturesensorsareavailable,(seeBattery

Charging and Temperature Sensor in this data sheet and the Temperature Sensor data sheet at belfuse.com/power-solutions.

56 (2.2")L

L = 2 m (standard length)

other cable lengths on request

adhesive tape

26 (1.02")

9.8 (0.4")

09125a

European

Projection

9.8 (0.04")

+–

Battery

GND

Temperature

sensor

+–

05191a

green

brown

white

D-SUB

Fuse

Load

Vo+

Vo–

Converter

VCC

Fig. 26

Temperature sensor

Fig. 27

Connection of temperature sensor

Table 20: Sensors for converters with standard R-input

Battery

voltage

nom. [V]

Sensor type Cell

volt-

age

[V]

Cell temp.

coe󰀩cient

[mV/K]

Cable

length

[m]

12 S-KSMH12-2.27-30-2 2.27 –3.0 2

12 S-KSMH12-2.27-35-2 2.27 –3.5 2

24 S-KSMH24-2.27-30-2 2.27 –3.0 2

24 S-KSMH24-2.27-35-2 2.27 –3.5 2

24 S-KSMH24-2.31-35-0 2.31 –3.5 4.5

24 S-KSMH24-2.31-35-2 2.31 –3.5 2

24 S-KSMH24-2.35-35-2 2.35 –3.5 2

48 S-KSMH48-2.27-30-2 2.27 –3.0 2

48 S-KSMH48-2-27-35-2 2.27 –3.5 2

For additional accessory product information, see the accessory data sheets listed with each product series or individual

model at our website.

NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems,

equipment used in hazardous environments, or nuclear control systems.

TECHNICAL REVISIONS-Theappearanceofproducts,includingsafetyagencycerticationspicturedonlabels,maychangedependingonthe

datemanufactured.Specicationsaresubjecttochangewithoutnotice.