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EMC Specifications

Parameter

Standard

Criteria

Specification

Transient Input Voltage

See Note 1

RIA 12

A

385V/20 mS

Maximum Input Voltage See Note 1

EN 50155

B

1,800V (5/50 µS, 50 or 100

B

8,400V (0.05/0.1 µS, 100

Radiated Emissions

See Note 2

EN 55022

Class B

Conducted Emissions

See Note 2

EN 55022

Class B

ESD

EN 61000-4-2

B

±4 kV Contact

RS

EN 61000-4-3

A

10V/m

EFT

See Note 3

EN 61000-4-4

B

±4 kV

Surge

See Note 4

EN 61000-4-5

B

±2 kV/±4 kV

CS

EN 61000-4-6

A

3 Vrms

Voltage Dips

EN 61000-4-29

B

0% - 70%

Typical Connection

The diagram above illustrates a typical connection of the MR2011S series.The

MDCFM-40U filter module is used to make the circuit compliant with input

surge and EMC standards EN 55022, EN 61000 and EN 50155.This can also be

accomplished by using external filter components as shown in the board layout

drawing below. Some notes on these components are:

1. It is recommended that an external fuse be used. The recommended fuse is

shown in the model chart on page 2.

2. An external MOV is recommended on the input to protect the unit in the event

of a surge. A recommended value is given in the table at right.

3. An external TVS is recommended on the input to protect the unit in the event

of a voltage spike. A recommended value is given in the table at right.

capacitor. Care must be taken in choosing this capacitor not to exceed the

capacitive load specification for the unit.Voltage derating of capacitors should

be 80% or above.

Notes:

1. With a pulse interval that is >60S. Requires the addition of the filter module

MDCFM-40U (or a similar discrete circuit) as shown in the circuit/board

layout diagrams below. Contact the factory for more information.

2. All units will meet class B with the addition of the filter module MDCFM-40U

(or a similar discrete circuit) as shown in the circuit/board layout diagrams

below. Contact the factory for more information.

3. To meet the requirements of EN 61000-4-4 (±4 kV), external components are

needed.This can be done discretely, or with the addition of the MDCFM-40U.

Contact the factory for more information.

4. To meet the requirements of EN 61000-4-5 (±2 kV/ ±4 kV ),external components

are needed.This can be done discretely,or with the addition of the MDCFM-40U.

Contact the factory for more information.

5. Suggested component values are:

Component

Value

MOV

S14K35

56 µH

TVS

SMCJ170

100 µF/200V

1.0 µF/50V

4.7 µH

1,000 pF/2 kV

6. Input noise and surge suppression modules are available for a

number of MPD DC/DC power supplies. For use with the MRxxS

product series, the MDCFM-40U DC filter module is recom-

Vin

(VDC)

Input

Capacitor

Vout

(VDC)

Output

Capacitor

110

100 µF

5.0

470 µF

12

220 µF

15

220 µF

24

100 µF

mended. A typical board layout with this module is shown in the figure

below. For pricing or full technical information on these modules please

contact the factory.

7. In many applications,

simply adding input/out-

put capacitors will en-

hance the input surge

protection & and reduce

output ripple sufficiently.

In this case, capacitors

connected as shown, without the other filter components. Recom-

mended capacitor values are given in the table above.