IEC 60917-1:1998 pdf download – Modular order for the development of mechanicalstructures for electronic equipment practices -Part 1: Generic standard

IEC 60917-1:1998 pdf download – Modular order for the development of mechanicalstructures for electronic equipment practices -Part 1: Generic standard.
IEC 60917-1 relates to equipment practices. The modular order is applicable to the main structural dimensions of electronic equipment mounted in various installations where dimensional interfaces have to be conssdered.
It refers to basic design parameters and is not intended to be used for manufacturing tolerances or clearances.
In addition, information on interfaces to other technical fields, on technology and advanced design aspects is included.
This standard also covers standard terms for parts and assemblies of mechanical structures for electronic equipment.
This generic standard gives the definitions of a modular order for mechanical structures of electronic equipment and provides for dimensional compatibility at mechanical interfaces with related engineering applications, e.g. printed boards, components, instrumentation, furniture, rooms, buildings. etc.
Furthermore, it supports the introduction and application of the modular order rules considering that:
— compatibility of interface dimensions is aimed at the electronic field on the basis of the SI unit metre;
— technical and economic advantages can be achieved when using the rules.
The terms in this standard should be used in all standards for mechanical structures of
electronic equipment and in related technical documents.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(581):1978, International Electrotechnical Vocabulary (1EV) — Chapter 581: Electromechanical components for electronic equipment
IEC 60297-1:1986, Dimensions of mechanical structures of the 482,6 mm (19 in) series — Part 1: Panels and racks
IEC 60297-2:1982, Dimensions of mechanical structures of the 482,6 mm (19 in) series — Part 2: Cabinets and pitches of rack structures
IEC 60297-3:1984. Dimensions of mechanical structures of the 482,6 mm (19 in) series — Part 3:
Subracks and associated plug-in units
IEC 60917-2:1992. Modular order for the development of mechanical structures for electronic equipment practices – Part 2: Sectional specification — interface co-ordination dimensions for the 25 mm equipment practice
IEC 60917-2-1:1993. Modular order for the development of mechanical structures for electronic equipment practices — Part 2: Sectional specification — Interface co-ordination dimensions for the 25 mm equipment practice — Section 1: Detail specification — Dimensions for cabinets and racks
IEC 60917-2-2:1994, Modular order for the development of mechanical structures for electronic equipment practices — Part 2: Sectional specification — Interface co-ordination dimensions for the 25 mm equipment practice — Section 2: Detail specification — Dimensions for subracks. chassis, backplanes, front panels and plug-in units
IEC Guide 103:1980. Guide on dimensional co-ordination
ISO 31:1992. Quantities arid units
ISO 1000:1992, SI units and recommendations for the use of their multiples and of certain other units
ISO 1006:1983. Building construction — Modular coordination — Basic module
ISO 1040:1983. Building construction — Modular coordination — Multimodules for horizontal
coordinating dimensions
ISO 3827-1:1977, Shipbuilding — Coordination of dimensions In ships’ accommodation — Part 1:
Principles of dimensional coordination
3 Terms, terminology and definitions
For the purpose of this International Standard, the terminology used is in accordance with the terminology in IEC 60050(581) and the following additional terms and definitions apply.
equipment practice
mechanical structure involved in housing and mounting of electronic and electromechanical systems. It provides for compatibility between mechanical parts, electrical interconnections and electronic components.
3.2
modular order
set of rules which establishes a relationship between co-ordination dimensions and the base pitch, multiple pitches and mounting pitches to be used in equipment practice
3.3
co-ordination dimension
reference dimension used to co-ordinate mechanical interfaces. This is not a manufacturing dimension with a tolerance.
NOTE — An actual outside dimension ot a mechanical structure related to a co-ordinahon c*amenslon can only decrease.