IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Protection Degree and Cleaning Liquids
Installation Instruction
The protection degree of the converters is IP 30, except open-
frame models (option Z).
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.
In order to avoid possible damage, any penetration of cleaning
fluids should be prevented, since the power supplies are not
hermetically sealed.
Connection to the system shall be made via a printed circuit
board; see Mechanical Data.
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.
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.
Note: Cleaning liquids may damage the adhesive joints of the
ferrite cores.
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.
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.
Standards and Approvals
The converters are safety-approved to the latest edition of IEC/
EN 60950-1 and UL/CSA 60950-1.
The converters have been evaluated for:
• Building-in
Table 12: Electric strength test voltages
• 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
Characteristic
Input to output
20/40IMX 20/40IMX2 110IMX
24/48IMS 70IMX
o/o3
Unit
Factory test >1 s
Equivalent DC volt.
1.2
(1.5)
1.2
1.51
(2.1)
1.2
2.0
(2.5)
1.2
0.1
0.15
–
kVAC
kVDC
nF
- 1500 V for 20IMX7, 24IMS7, 40IMX7, 48IMS7
- 2000 V for 70IMX7
- 2500 V for 110IMX7.
Coupling
capacitance
Insulation resist.
at 500 VDC
>100
>100
>100
–
MΩ
The converters are subject to manufacturing surveillance in
accordance with the above mentioned standards and ISO
9001.
1
1.5 kVAC according to IEC 60950, sect. 6.2, Telecom equipment;
type test with 1.5 kVAC / 60 s (IEE 802.3).
2
3
Railway Applications
20/40IMX7 produced 2014 or later.
The test voltage between outputs is not applied as routine test.
To comply with railway standards, all components are coated
with a protective lacquer (except option Z).
necessary or in the case that the motherboard should be
lacquered after fitting the converter; see Cleaning Liquids.
Description of Options
Option M: SMD pins
Option G: RoHS-6
This option allows surface mounting of the converters.
Converters with a type designation ending by G are RoHS-
compliant for all six substances.
Option Z: Open Frame
For applications, where the protection by a housing is not
NUCLEAR AND MEDICALAPPLICATIONS - 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 © 2018, Bel Power Solutions Inc. All rights reserved.
belfuse.com/power-solutions
MELCHER
The Power Partners.
BCD20007-G Rev AG, 10-Apr-2018
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