IEC 60297-5-105:2001

Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 5-105: Subracks and associated plug-in units - Alignment and/or earth pin

Specifies dimensions which will ensure dimensional interchangeability of subracks and associated plug-in units using the extended function of an alignment and/or earth pin method added to IEC 60297-3, IEC 60297-4 and IEC 60297-5-107.

General Information

• Status: Replaced
• Publication Date: 23-Jan-2001
• 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: DELPUB - Deleted Publication
• Completion Date: 17-Aug-2004

Relations

• Replaced By: IEC 60297-3-103:2004 - Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-103: Keying and alignment pin
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60297-5-105
First edition
2001-01
Mechanical structures for electronic equipment –
Dimensions of mechanical structures
of the 482,6 mm (19 in) series –
Part 5-105:
Subracks and associated plug-in units –
Alignment and/or earth pin
Structures mécaniques pour équipement électronique –
Dimensions des structures mécaniques de la série
de 482,6 mm (19 in) –
Partie 5-105:
Bacs et blocs enfichables associés –
Broche d'alignement et/ou de terre

Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
60297-5-105
First edition
2001-01
Mechanical structures for electronic equipment –
Dimensions of mechanical structures
of the 482,6 mm (19 in) series –
Part 5-105:
Subracks and associated plug-in units –
Alignment and/or earth pin
Structures mécaniques pour équipement électronique –
Dimensions des structures mécaniques de la série
de 482,6 mm (19 in) –
Partie 5-105:
Bacs et blocs enfichables associés –
Broche d'alignement et/ou de terre

 IEC 2001  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
M
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60297-5-105  IEC:2001(E)

CONTENTS
Page
FOREWORD . 3

INTRODUCTION .5

Clause
1 Scope and object . 6

2 Normative references . 6

3 Definitions. 7
4 Extended features added to IEC 60297-3 and IEC 60297-4. 7
5 General equipment arrangement . 8
6 Detail equipment arrangement. 9
7 Alignment and/or earth pin for printed board type plug-in units ≥ 4HP. 10
7.1 Alignment and/or earth pin receptacle position in the subrack guide for printed
board type plug-in units ≥ 4HP. 10
7.2 Alignment and/or earth pin and alignment/earth receptacle inspection
dimensions . 12
Figure 1 – General equipment arrangement – Typical 6U subrack with front and/or rear
mounted board type plug-in units featured with alignment and/or earth pins. 8
Figure 2 – Design detail equipment arrangement . 9
Figure 3 – Alignment and/or earth pin receptacle position in the subrack front/rear
mounted guide rails . 10
Figure 4 – Subrack alignment and/or earth pin receptacle position for subrack front
mounted plug-in units .11
Figure 5 – Subrack alignment and/or earth pin receptacle position for subrack rear
mounted plug-in units .11
Figure 6 – Front and/or rear subrack and printed board type plug-in unit alignment
and/or earth pin/receptacle inspection dimensions . 12
Table 1 – Subrack alignment and/or earth pin receptacle and printed board type plug-in
unit alignment/earth pin inspection dimensions. 12

60297-5-105 © IEC:2001(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –

DIMENSIONS OF MECHANICAL STRUCTURES

OF THE 482,6 mm (19 in) SERIES –

Part 5-105: Subracks and associated plug-in units –

Alignment and/or earth pin
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60297-5-105 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/243/FDIS 48D/252/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 3.
IEC 60297-5 consists of the following parts under the general title: Mechanical structures for
electronic equipment – Dimensions of mechanical structures of the 482,6 mm (19 in) series:
Part 5-100, Subracks and associated plug-in units – Design overview
Subracks and associated plug-in units –
Part 5-101, Injector/extractor handle
Part 5-102, Subracks and associated plug-in units – Electromagnetic shielding provision

– 4 – 60297-5-105  IEC:2001(E)

Part 5-103, Subracks and associated plug-in units – Electrostatic discharge protection

Part 5-104, Subracks and associated plug-in units – Keying

Part 5-105, Subracks and associated plug-in units – Alignment and/or earth pin

Part 5-107, Subracks and associated plug-in units – Rear mounted plug-in units

The committee has decided that the contents of this publication will remain unchanged until
2004. At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

60297-5-105 © IEC:2001(E) – 5 –

INTRODUCTION
This part of IEC 60297 is based on IEC 60297-3 (1984), its Amendment 1 (1992), and

IEC 60297-4 (1995). It contains detail dimensions which ensure dimensional interchangeability

of subracks and plug-in units, with alignment and/or earth pins where removable board type

plug-in units require a method of aligning and/or earthing subrack front and/or rear mounted

plug-in unit front panels (in the case of an earthing in, plugged-in condition) to the subrack

chassis earth.
The basic function of the alignment and/or earth pin for the board type plug-in unit with front

panel is to align the printed board type plug-in unit mounted connector prior to engagement
with the subrack mounted connector, and to control electromagnetic shielding gasket pressure
(see IEC 60297-5-102).
For the purpose of this standard, a minimum printed board type plug-in unit front panel with a
width of four horizontal pitches (4HP) has been chosen. This is to permit the combination with
plug-in unit keying (see IEC 60297-5-104) and/or plug-in unit injector/extractor handles (see
IEC 60297-5-101).
Alignment of printed board type plug-in unit front panels of less than 4HP, box type plug-in unit
front panels or filler panels, typically required when electromagnetic shielding gaskets are
used, may use commercially available solutions designed within the rules of interchangeability,
or other standardized methods.
A further function of the alignment and/or earth pin is to act as an earth contact between the
subrack and the plug-in unit front panel using no retention screw (see IEC 60297-3). In such a
case, the alignment and/or earth pin can act as an electrostatic discharge protection and/or a
earth device (see IEC 61587-1).
This standard applies only to the mechanical structures for electronic equipment practices
according to the IEC 60297 series.

– 6 – 60297-5-105  IEC:2001(E)

MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –

DIMENSIONS OF MECHANICAL STRUCTURES

OF THE 482,6 mm (19 in) SERIES –

Part 5-105: Subracks and associated plug-in units –

Alignment and/or earth pin
1 Scope and object
This part of IEC 60297 covers extended features of an alignment and/or earth pin method
added to board type plug-in units with front panels of a minimum width of four horizontal
pitches (HP) and subracks according to IEC 60297-3, IEC 60297-4 and IEC 60297-5-107. The
electrical test requirements are defined in IEC 61587-1. This alignment and/or earth pin feature
will also counteract the pressure exerted by the plug-in unit and/or filler panel shielding gaskets
as defined in IEC 60297-5-102. By implementing this extended feature in the subracks and
plug-in units, a new subrack and plug-in unit type (incompatible with IEC 60297-3 and
IEC 60297-4) is created.
The purpose of this standard is to specify dimensions which will ensure dimensional
interchangeability of subracks and associated plug-in units using the extended function of an
alignment and/or earth pin method added to IEC 60297-3, IEC 60297-4 and IEC 60297-5-107.
For mechanical and climatic tests refer to IEC 61587-1.
For electromagnetic shielding performance tests refer to IEC/TS 61587-3.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IE 60297. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 60297 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60297-3, Dimensions of mechanical structures of the 482,6 mm (19 in) series – Part 3:
Subracks and associated plug-in units
IEC 60297-4, Mechanical structure
...