IEC 60917-2-4:2010

IEC 60917-2-4 ®
Edition 1.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Modular order for the development of mechanical structures for electronic
equipment practices –
Part 2-4: Sectional specification – Interface co-ordination dimensions for the
25 mm equipment practice – Adaptation dimensions for subracks or chassis
applicable in cabinets or racks in accordance with IEC 60297-3-100 (19 in)

Ordre modulaire pour le développement des structures mécaniques pour les
infrastructures électroniques –
Partie 2-4: Spécification intermédiaire – Dimensions de coordination pour les
interfaces des infrastructures au pas de 25 mm – Dimensions d’adaptation des
bacs ou des châssis, applicables dans les baies ou les bâtis, conformément à la
CEI 60297-3-100 (19 pouces)
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IEC 60917-2-4 ®
Edition 1.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Modular order for the development of mechanical structures for electronic
equipment practices –
Part 2-4: Sectional specification – Interface co-ordination dimensions for the
25 mm equipment practice – Adaptation dimensions for subracks or chassis
applicable in cabinets or racks in accordance with IEC 60297-3-100 (19 in)

Ordre modulaire pour le développement des structures mécaniques pour les
infrastructures électroniques –
Partie 2-4: Spécification intermédiaire – Dimensions de coordination pour les
interfaces des infrastructures au pas de 25 mm – Dimensions d’adaptation des
bacs ou des châssis, applicables dans les baies ou les bâtis, conformément à la
CEI 60297-3-100 (19 pouces)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 31.240 ISBN 978-2-88910-330-0
– 2 – 60917-2-4 © IEC:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope and object.6
2 Normative references .6
3 Arrangement overview (Figure 1) and definitions .7
4 Dimensions for adaptor flanges of the specific metric subracks or chassis (suitable
only where W = 425 mm) mountable into 19 in cabinets or racks.8
S1
4.1 General .8
4.2 Dimensions for mounting holes arrangements on the adaptor flanges,
mounting layout referred to the bottom pitch lines of the metric subracks or
chassis.8
4.3 Dimensions for mounting holes arrangements on the adaptor flanges,
mounting layout referred to the unit centre lines of the metric subracks or
chassis.10
Bibliography.14

Figure 1 – Arrangement overview – Adaptation of specific subracks (aperture width for
plug-in units: W = 425 mm, 85 × 5,0 mm) of IEC 60917-2-4 into cabinets of
S1
IEC 60297-3-100 .7
Figure 2 – Mounting hole arrangements of the adaptor flanges, mounting layout
referred to the bottom pitch lines of the metric subracks or chassis.8
Figure 3 – Dimensions of mounting hole positions of the adaptor flanges, mounting
layout referred to the bottom pitch lines of the metric subracks or chassis .9
Figure 4 – Mounting hole arrangements on the adaptor flanges, mounting layout
referred to the unit centre lines of the metric subracks or chassis .11
Figure 5 – Dimensions of mounting holes positions of the adaptor flanges, mounting
layout referred to the unit centre lines of the metric subracks or chassis.12

Table 1 – Dimensions of mounting holes positions of the adaptor flanges, mounting
layout referred to the bottom pitch lines of the metric subracks or chassis .10
Table 2 – Dimensions of mounting holes positions of the adaptor flange, mounting
layout referred to the unit centre lines of the metric subracks or chassis.13

60917-2-4 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MODULAR ORDER FOR THE DEVELOPMENT
OF MECHANICAL STRUCTURES
FOR ELECTRONIC EQUIPMENT PRACTICES –

Part 2-4: Sectional specification –
Interface co-ordination dimensions for the 25 mm equipment practice –
Adaptation dimensions for subracks or chassis applicable in cabinets
or racks in accordance with IEC 60297-3-100 (19 in)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60917-2-4 has been prepared by subcommittee 48D: Mechanical
structures for electronic equipment, of IEC technical committee 48: Electromechanical
components and mechanical structures for electronic equipment.

– 4 – 60917-2-4 © IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
48D/420/FDIS 48D/424/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of IEC 60917 series, under the general title Modular order for the
development of mechanical structures for electronic equipment practices, can be found on the
IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
60917-2-4 © IEC:2010 – 5 –
INTRODUCTION
The IEC 60917 series of standards provides definitio
...