RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com Page "1

The leader in 
rugged fiber optic

technology.PRODUCT INFORMATION

RLH Industries, Inc.

PI-019 2017A-0508

RLH-D-DCDC-4812H-1 Dual Output Power Supply

RLH DC/DC Dual Output Power Supply 
DIN/Wall Mount 130VDC INPUT TO REGULATED 
48VDC & 12VDC OUTPUT

Overview The RLH 130V Dual Output DC/DC DIN rail mount power supply is a compact power supply designed to convert 130VDC power (43~160VDC) to regulated 48VDC and 12VDC output to power a wide range of industrial equipment.

Each internal regulated power supply section is separate and independent of the other power section, allowing for maximum efficiency and operation.

The power supply may be DIN rail or wall-mounted, and includes a power indicator for each output section so that performance and operation may be quickly assessed. It has low output ripple along with short circuit, over-voltage and overload protection, fan-less convection cooled design, and extended operating temperature range with high efficiency.

This rugged power supply features a tough aluminum alloy frame with powder coated galvanized steel housing for superior corrosion resistance.

Standard Features

130VDC input with 48VDC & 12VDC output terminals

Short circuit, overload, over voltage and over 
temperature protection

Cooling by free air convection

May be installed on 35mm DIN rail

Individual LED power indicators for each output

Convenient screw down terminals accept up to 
8AWG wiring

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"

Input / Output Terminals

No. Description3, 4 DC Output -12V5, 6 DC Output +12V7, 8 DC Output -48V9, 10 DC Output +48V

DC TERMINAL (OUTPUT)No. Description1 130V DC +2 130V DC -

DC TERMINAL (INPUT)

Note: DC output is positive voltage as marked.
For negative DC voltage (-12VDC or -48VDC), reverse wiring polarity when connecting to the DC output terminals.

CAUTIONSevere shock hazard.Outputs are energized when inputpower is applied.

RLH Industries, Inc.

RLH-D-DCDC-H4812-1

DC/DC POWER SUPPLY

48+ 2VOLTS DC - DUAL OUTPUT

12VOK

OUTPUT

INPUT

4A12VDC

130VDC

48VOK

OUTPUT

2A48VDC

48VDC OUTPUT

DC INPUT

12VDC OUTPUT

1 2

4 5 63 8 97 10

TEP 75WI SeriesApplication Note

http://www.tracopower.com Page 39 of 69

Characteristic Curves

Ambient Temperature, TA(˚C)

120

100

20

0-40 20 40 60 80 100 120

Out

put

Pow

er (

%)

80

60

40

12V Output Derating Curve

Application Note

Created by Traco Electronic AG www.tracopower.com Date: June 27th, 2012 / Rev.: 1.2 / Page 47 / 70

182W , Sin g l e O ut p ut

C h ara cteristic C urves All test conditions are at 25°C. The figures are identical for TEP 160-7218WIR

Efficiency versus Output Current Power Dissipation versus Output Current

Efficiency versus Input Voltage. Full Load Derating Output Current versus Ambient Temperature with

Airflow, Vin = Vin nom

Derating Output Current Versus Ambient Temperature with

Heat-Sink and Airflow, Vin = Vin nom

0

20

40

60

80

100

120

-40 -20 0 20 40 60 80 100 120AMBIENT TEMPERATURE,TA( )

OU

TPU

T P

OW

ER

(%)

20LFM (natural convection)100LFM200LFM300LFM400LFM500LFM

60.062.565.067.570.072.575.077.580.082.585.087.590.092.595.0

43 50 60 70 80 90 100 110 120 130 140 150 160INPUT VOLTAGE(V)

EFF

ICIE

NC

Y(%

)

Iout= 100% F.LIout= 50% F.LIout= 25% F.L

0

20

40

60

80

100

120

-40 -20 0 20 40 60 80 100 120AMBIENT TEMPERATURE,TA( )

OU

TPU

T P

OW

ER

(%)

Mount on 2U iron base-plate(dimension 19” X 3.5” X 0.063”)20LFM (natural convection)Terminal block20LFM (natural convection)DC/DC module only100LFM200LFM300LFM400LFM500LFM

60.062.565.067.570.072.575.077.580.082.585.087.590.092.595.0

10 20 30 40 50 60 70 80 90 100% of FULL LOAD

EFF

ICIE

NC

Y(%

)

Vin= 43VVin= 72VVin= 110VVin= 160V

0.02.04.06.08.0

10.012.014.016.018.020.022.024.026.028.030.0

10 20 30 40 50 60 70 80 90 100% of FULL LOAD

Pow

er D

issi

patio

n(W

)

Vin= 43VVin= 72VVin= 110VVin= 160V

Out

put

Pow

er (

%)

Ambient Temperature, TA(˚C)

120

100

20

0

-40 -20 20 60 80 100 120

80

60

40

48V Output Derating Curve

0 40

RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com Page "2

RLH Industries, Inc.

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Dimensional Information

(TOP VIEW)

3.8 4.9

5.0

RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com Page "3

RLH Industries, Inc.

Ordering Information

Please contact your RLH sales representative for pricing and delivery information


Specifications

Part Number Input Output

RLH-D-DCDC-4812H-1 130VDC 48VDC, 2.1A / 12VDC, 4.1A

INPUT VOLTAGE RANGE Min 72VDCMax 144VDCTypical 110VDC

UNDERVOLTAGE LOCKOUT Power Down 71VDC or lowerSURGE VOLTAGE Max 160VDC (100 msec. max.)

OUTPUT VOLTAGE OUTPUT Dual Outputs 48VDC @ 2.1A12VDC @ 4.1A

VOLTAGE ACCURACY ±1.5% Max.TRANSIENT RESPONSE 400µs typ. (25% Step Load Change)RIPPLE & NOISE, 20MHz BW 300mV pk-pk max.TEMPERATURE COEFFICIENT ±0.02% / ˚CSHORT CIRCUIT PROTECTION Continuous, automatic recoveryLINE REGULATION ±0.2% max. (Measured from low line to high line)

±0.5% max. (Measured from no load to full load)OVERVOLTAGE PROTECTION 115~130% of Vout nomSTART UP TIME 25ms typ. (nominal Vin and constant resistive load)CAPACITIVE LOAD 12VDC output 5250µf

48VDC output 790µfGENERAL EFFICIENCY 85%

ISOLATION VOLTAGE Input/Output 1500VDCInput/Case 1500VDC

ISOLATION RESISTANCE Input/Output 100M ohm min.SWITCHING FREQUENCY 300KHz typ.DERATING Refer to derating curve

ENVIRONMENTAL OPERATING TEMP. -40˚C to +70˚CSTORAGE TEMP -55˚C to +125˚CHUMIDITY 95% RH max., non-condensingMTBF 75Khrs MIL-HD-217F

PHYSICAL DIMENSIONS H 5.0 in. x W 4.7 in. x D 3.7 in. (127mm x 119mm x 94mm)HOUSING Aluminum alloy, powder coated galvanized steelMOUNTING 35mm DIN rail

RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com Page "4

RLH Industries, Inc.