IEC 60297-3-105:2008

Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-105: Dimensions and design aspects for 1U high chassis

IEC 60297-3-105:2008 specifies the dimensions for 1U chassis mounted into IEC 60297-3-100 compliant racks/cabinets where dimensions, loaded weight and accessibility require differing assembly methods. Guidance for cooling and reference for EMC, seismic and for the climatic and mechanical requirements and tests are provided, as defined in the IEC 61587 series.

Structures mécaniques pour équipements électroniques - Dimensions des structures mécaniques de la série 482,6 mm (19 pouces) - Partie 3-105: Dimensions et aspects de conception pour les châssis d'une hauteur de 1U

La CEI 60297-3-105:2008 spécifie les dimensions pour les châssis de 1U montés dans des bâtis/baies conformes à la CEI 60297-3-100, où les dimensions, le poids et l'accessibilité exigent différentes méthodes d'assemblage. Des lignes directrices pour le refroidissement et une référence pour les exigences et les essais de CEM, sismiques, climatiques et mécaniques sont fournies, comme défini dans la série CEI 61587.

General Information

• Status: Published
• Publication Date: 25-Nov-2008
• 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: 15-Dec-2008
• Completion Date: 26-Nov-2008

Standards Content (Sample)

IEC 60297-3-105
Edition 1.0 2008-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-105: Dimensions and design aspects for 1U high chassis

Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-105: Dimensions et aspects de conception pour les châssis d’une
hauteur de 1U
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IEC 60297-3-105
Edition 1.0 2008-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-105: Dimensions and design aspects for 1U high chassis

Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-105: Dimensions et aspects de conception pour les châssis d’une
hauteur de 1U
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
Q
CODE PRIX
ICS 31.240 ISBN 978-2-88910-096-5
– 2 – 60297-3-105 © IEC:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Arrangement overview.7
5 Dimensions of the 1U chassis.9
5.1 Chassis type A .9
5.2 Chassis type B .10
5.3 Chassis type C .11
6 Climatic, mechanical tests (safety aspects, EMC, seismic) .12
Annex A (informative) Chassis and rack/cabinet relationship .13
Annex B (informative) Cooling air flow .15
Annex C (informative) Chassis depth relationship to the rack/cabinet .16

Figure 1 – Chassis type A.8
Figure 2 – Chassis type B.8
Figure 3 – Chassis type C.8
Figure 4 – Dimensions of chassis type A.9
Figure 5 – Dimensions of chassis type B.10
Figure 6 – Dimensions of chassis type C .11
Figure A.1 – Chassis type B and rack/cabinet relationship .13
Figure A.2 – Chassis type C rack/cabinet relationship.14
Figure B.1 – Cooling airflow direction.15

Table C.1 – Maximum depth D in relation to corresponding cabinet depth.16

60297-3-105 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-105: Dimensions and design aspects for 1U high chassis

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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International Standard IEC 60297-3-105 has been prepared by subcommittee 48D:
Mechanical structures for electronic equipment, of IEC technical committee 48:
Electromechanical components and mechanical structures for electronic equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
48D/381/FDIS 48D/387/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 60297-3-105 © IEC:2008
A list of all parts of IEC 60297 series, published under the general title Mechanical structures
for electronic equipment – Dimensions of mechanical structures of the 482,6 mm (19 in)
series, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date 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.
60297-3-105 © IEC:2008 – 5 –
INTRODUCTION
Electronic systems based on 1U chassis design have become one of the most important
platforms used for servers, industrial electronics, information technology (IT) and
telecommunication equipment. 1U chassis are sometimes referred to as “Pizza Boxes”.
Applications for 1U chassis designs are wide spread and solutions are found in every
segment of the electronics industry.
IEC 60297-3-100 defines the dimensional rack/cabinet details such as the available aperture
and the front panel mounting dimensions. However, IEC 60297-3-100 falls short of providing
guidance or dimensional requirements for assembling 1U chassis designs into these
IEC 60297 conforming racks/cabinets either in singles or in multiples (stacked in n × 1U).
This part of IEC 60297 will give guidance and provide for dimensional requirements for 1U
chassis based on weight loading, physical size and service accessibility.
In this standard, various chassis types are identified according to application needs.
The defined interface dimensions of the various chassis types permit the development of
common mounting accessories. Due to this clarification and the application specific chassis
type choice, the serviceability and airflow aspects of the chosen 1U chassis can be addressed
by the designer.
...