IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

BCD20007-G Rev AF, 31-Jul-2015

Page 14 of 14

MELCHER

The Power Partners.

Standards and Approvals

The converters are approved according to IEC 60950 -1 and UL/

The converters have been evaluated for:

• Building-in

• Basic insulation input to output, based on their maximum

input voltage

• Pollution degree 2 environment

• Connecting the input to a secondary circuit, which is

subject to a maximum transient rating of

- 1500 V for 20IMX7, 24IMS7, 40IMX7, 48IMS7

- 2000 V for 70IMX7

- 2500 V for 110IMX7.

The converters are subject to manufacturing surveillance in

accordance with the above mentioned standards.

Railway Applications

To comply with railway standards, all components are coated

with a protective lacquer (except option Z).

Protection Degree and Cleaning Liquids

The protection degree of the converters is IP 30, except open-

frame models (option Z).

In order to avoid possible damage, any penetration of cleaning

fluids should be prevented, since the power supplies are not

hermetical sealed.

However, open-frame models (option Z) leave the factory

unlacquered; they may be lacquered by the customer, for

instance together with the mother board. Cleaning agents are

not permitted – except washing at room temperature with

isopropyl alcohol. If necessary, the mother board must be

cleaned, before fitting the open-frame converter.

Note: Cleaning liquids may damage the adhesive joints of the

ferrite cores.

Isolation

The electric strength test is performed in the factory as a routine

test in accordance with EN 50514 and IEC/EN 60950, and

should not be repeated in the field. The Company will not honor

any warranty claims resulting from electric strength field tests.

Installation Instruction

Installation of the converters 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.

Connection to the system shall be made via a printed circuit

board; see Mechanical Data.

The converters should be connected to a secondary circuit.

Do not open the converter.

Ensure that a converter failure does not result in a hazardous

conditions.

To prevent excessive current flowing through the input lines in

case of a short-circuit, an external fuse specified in section

Input Fuse and Reverse Polarity Protection should be installed

in the non-earthed input supply line.

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 certifications pictured on labels, may change depending on the

date manufactured. Specifications are subject to change without notice.

Copyright © 2015, Bel Power Solutions Inc. All rights reserved.

www.belpowersolutions.com/power

Table 12: Electric strength test voltages

Characteristic

Input to output

Unit

24/48IMS

70IMX

Factory test >1 s

1.2

2.0

0.1

kVAC

Equivalent DC volt.

(1.5)

(2.1)

(2.5)

0.15

kVDC

Coupling

1.2

1.2

1.2

–

nF

capacitance

Insulation resist.

>100

>100

>100

–

M

Ω

at 500 VDC

type test with 1.5 kVAC / 60 s (IEE 802.3).=

Description of Options

Option M: SMD pins

This option allows surface mounting of the converters.

Option Z: Open Frame

For applications, where the protection by a housing is not

necessary or in the case that the motherboard should be

lacquered after fitting the converter; see Cleaning Liquids.

Option G: RoHS-6

Converters with a type designation ending by G are RoHS-

compliant for all six substances.