IEC 60297-3-108:2014

Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-108: Dimensions of R-type subracks and plug-in units

IEC 60297-3-108:2014 provides dimensions and features for R-type subracks and plug-in units, i.e. ruggedized variants of the mechanical structures of the 482,6 mm (19 in) series, with enhanced vibration and shock resistance and/or improved EMC performance, for use in more harsh environment. This leads to a subrack standard which is externally compatible with IEC 60297-3-100 but internally largely incompatible with IEC 60297-3-101. R-type subracks, chassis integrated subracks and plug-in units incorporate dimensions and features which provide for a higher level of ruggedness, compared with IEC 60297-3-101 (test set-up and load definitions are selected from IEC 61587-1 and IEC 61587-5). Key words: R-Type, Subracks, Plug-in unit

Structures mécaniques pour équipements électroniques - Dimensions des structures mécaniques de la série 482,6 mm (19 pouces) - Partie 3-108: Dimensions des bacs de type R et des blocs enfichables

IEC 60297-3-108:2014 donne les dimensions et caractéristiques des bacs de type R et des blocs enfichables, c'est-à-dire des variantes renforcées des structures mécaniques de la série 482,6 mm (19 pouces), avec une augmentation de la résistance aux vibrations et aux chocs et/ou une amélioration des performances CEM, pour utilisation dans un environnement plus sévère. Ceci donne lieu à une norme sur les bacs, qui est compatible d'un point de vue externe avec l'IEC 60297-3-100, mais largement incompatible d'un point de vue interne avec l'IEC 60297-3-101. Les bacs de type R, les bacs intégrés au châssis et les blocs enfichables comportent des dimensions et des caractéristiques qui fournissent un niveau plus élevé de robustesse, par rapport à l'IEC 60297-3-101 (les définitions relatives au montage d'essai et à la charge sont choisies dans l'IEC 61587-1 et l'IEC 61587-5). Mots-clés: type R, bacs, bloc enfichable

General Information

• Status: Published
• Publication Date: 08-Sep-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: SC 48D - Mechanical structures for electrical and electronic equipment
• Drafting Committee: WG 4 - TC 48/SC 48D/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 31-Aug-2014
• Completion Date: 09-Sep-2014

Standards Content (Sample)

IEC 60297-3-108 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-108: Dimensions of R-type subracks and plug-in units

Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-108: Dimensions des bacs de type R et des blocs enfichables

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IEC 60297-3-108 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electronic equipment – Dimensions of mechanical

structures of the 482,6 mm (19 in) series –

Part 3-108: Dimensions of R-type subracks and plug-in units

Structures mécaniques pour équipements électroniques – Dimensions des

structures mécaniques de la série 482,6 mm (19 pouces) –

Partie 3-108: Dimensions des bacs de type R et des blocs enfichables

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 31.240 ISBN 978-2-8322-1790-0

– 2 – IEC 60297-3-108:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Arrangement overview . 8
5 RA – type subrack . 9
5.1 General . 9
5.2 RA–type subrack rear mounting dimensions . 11
6 RB–type subrack . 12
6.1 General . 12
6.2 RB–type subrack rear mounting dimensions . 13
7 R–type subrack guide rails . 13
8 Electromagnetic shielding provisions and mounting flanges . 14
9 Chassis integrated subrack . 15
9.1 General . 15
9.2 RA– C–type chassis/subrack . 16
9.3 RB–C–type chassis/subrack . 16
10 Front panel/plug-in unit compatible with RA – type subrack . 17
11 Front panel/plug-in unit compatible with RB – type subrack . 19
12 Injector/extractor handle . 20
13 Printed board dimensions . 20
14 Dimensions. 21
15 Nomenclature . 22
15.1 Reference plane (given in square boxes of figures) . 22
15.2 Dimensions of Table 1 . 22
Annex A (normative) Mounting support . 23
A.1 Chassis/subrack mounting support in cabinets . 23
Annex B (normative) Environmental tests. 24
B.1 Static and dynamic load test . 24
B.2 Seismic test . 24
B.3 Electromagnetic shielding performance test . 24
Annex C (normative) Thermal management . 25
C.1 Air ducting . 25
Annex D (informative) Comparison of IEC 60297-3-101 with IEC 60297-3-108 . 26

Figure 1 – Subrack application . 6
Figure 2 – Arrangement of a R-type subrack and plug-in units . 9
Figure 3 – RA–type subrack front mounting dimensions . 10
Figure 4 – RA–type subrack rear mounting dimensions . 11
Figure 5 – RB–type subrack front mounting dimensions . 12
Figure 6 – RB–type subrack rear mounting dimensions . 13
Figure 7 – R–type subrack guide rails . 14

Figure 8 – R–type subrack front attachment plane and mounting flanges . 15
Figure 9 – RA – C type chassis/subrack . 16
Figure 10 – RB–C – type chassis/subrack . 17
Figure 11 – Front panel/ plug-in unit compatible with RA – type subrack . 18
Figure 12 – Front panel/ plug-in unit compatible with RB – type subrack . 19
Figure 13 – Injector/extractor handle . 20
Figure 14 – Printed board dimensions . 21
Figure A.1 – Subrack/chassis mounting support . 23
Figure C.1 – Thermal management example . 25

Table 1 – Dimensions . 21
Table D.1 – Comparison of dimensions and features . 26

– 4 – IEC 60297-3-108:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MECHANICAL STRUCTURES
FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-108: Dimensions of R-type subracks and plug-in units

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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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