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  • EN 60917-2-2:1996

    Current The latest, up-to-date edition.

    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

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    Language(s): 

    Published date:  08-01-1996

    Publisher:  European Committee for Standards - Electrical

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    Table of Contents - (Show below) - (Hide below)

    1 Scope
    2 Normative references
    3 Terminology
    4 Equipment arrangement
    5 Dimensions
        5.1 Subracks
              5.1.1 Type A subrack, connector application
                     with backplane
              5.1.2 Type B subrack, connector application
                     without backplane
              5.1.3 Type C subrack
              5.1.4 Chassis
        5.2 Backplane
        5.3 Internal co-ordination and backplane grid
        5.4 Front panels on cabinets or racks and dimensions
              for subracks and chassis mounting flanges
        5.5 Types of plug-in units
              5.5.1 P type plug-in units
              5.5.2 P type plug-in units with injector/
                     extractor handles
              5.5.3 K frame type plug-in units to
                     accommodate P type plug-in units
              5.5.4 L frame type plug-in units with front
                     panels to accommodate P type plug-in
                     units without front panels
              5.5.5 M box type plug-in units with male guides
              5.5.6 N box type plug-in units without male
                     guides
              5.5.7 Clearance of plug-in units in subrack
        5.6 Terms, definitions and tables of dimensions
              5.6.1 Nomenclature
              5.6.2 Height dimensions
              5.6.3 Width dimensions
              5.6.4 Depth dimensions
    Figures
    1 Examples of subracks, backplanes, plug-in units and
        cabinet or rack front panels
    2 Dimensional relationship for subrack and plug-in
        units
    3a Subrack dimensions for mounting plug-in units, plug-in
        unit guides and backplanes
    3b Dimensions of subracks and fastening arrangement
    3c Plug-in unit guides and plug-in unit positions
    4 Optional subrack with front panels for electro-
        magnetic interference (EMI) shielding
    5 Mounting dimensions for connectors without backplane
    6 Type C subrack dimensions
    7 Backplane dimensions
    8 Relationship between reference planes and backplane
        grid
    9 Mounting dimensions for rack or cabinet front panels,
        subracks and chassis
    10 Mounting height dimensions for rack or cabinet front
        panels, chassis and subrack mounting flanges
    11 Examples of types of plug-in units
    12 P type plug-in unit dimensions
    13 Front panels for plug-in units
    14 Printed board dimensions
    15 P type plug-in injector/extractor handle dimensions
    16 K frame type plug-in units
    17 L frame type plug-in units
    18 M box type plug-in units
    19 N box type plug-in units
    20 Typical plug-in unit arrangements
    Annex ZA (normative) Normative references to international
    publications with their corresponding European
    publications

    Abstract - (Show below) - (Hide below)

    Prescribes dimensions which will ensure mechanical interchangeability of subracks, chassis, plug-in units, backplanes and front panels.

    General Product Information - (Show below) - (Hide below)

    Committee CLC/SR 48D
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS EN 60917-2-3:2006 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 2-3: SECTIONAL SPECIFICATION - INTERFACE CO-ORDINATION DIMENSIONS FOR THE 25 MM EQUIPMENT PRACTICE - EXTENDED DETAIL SPECIFICATION - DIMENSIONS FOR SUBRACKS, CHASSIS, BACKPLANES, FRONT PANELS AND PLUG-IN UNITS
    NF EN 61076 4 100 : 2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-100: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR MODULES HAVING A GRID OF 2,5 MM FOR PRINTED BOARDS AND BACKPLANES
    BS EN 61076-4-101:2001 Connectors for electronic equipment Printed board connectors with assessed quality. Detail specification for two-part connector modules, having a basic grid of 2,0 mm for printed boards and backplanes in accordance with IEC 60917
    BS EN 61969-2-1:2000 MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT - OUTDOOR ENCLOSURES - PART 2-1: DETAIL SPECIFICATION - DIMENSIONS FOR CABINETS
    I.S. EN 61076-4-111:2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PRINTED BOARD CONNECTORS WITH ASSESSED QUALIFY - DETAIL SPECIFICATION FOR TWO-PART POWER CONNECTOR MODULES, FOR PRINTED BOARDS AND BACKPLANES HAVING EARLY MATING FEATURES, AND HAVING A BASIC GRID OF 2,5 MM IN ACCORDANCE WITH IEC 60917-1
    I.S. EN 61076-4-101:2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-101: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR MODULES, HAVING A BASIC GRID OF 2,0 MM FOR PRINTED BOARDS AND BACKPLANES IN ACCORDANCE WITH IEC 60917
    I.S. EN 60917-2-4:2010 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 2-4: SECTIONAL SPECIFICATION - INTERFACE COORDINATION 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)
    CEI EN 61076-4-111 : 2003 CONNECTORS FOR ELECTRONIC EQUIPMENT PART 4-111: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART POWER CONNECTOR MODULES, FOR PRINTED BOARDS AND BACKPLANES HAVING EARLY MATING FEATURES, AND HAVING A BASIC GRID OF 2,5 MM IN ACCORDANCE WITH IEC 60917-1
    I.S. EN 61076-4-103:1999 CONNECTORS FOR USE IN D.C. LOW-FREQUENCY ANALOGUE AND DIGITAL HIGH SPEED DATA APPLICATIONS - PART 4-103: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART CONNECTORS WITH SHIELDING AND A BASIC GRID OF 2.5 MM
    EN 61076-4-108:2002 Connectors for electronic equipment - Part 4-108: Printed board connectors with assessed quality - Detail specification for cable-to-board connectors, with a modular pitch of 25 mm and integrated shielding function, applicable for transverse packing density of 15 mm, having a basic grid of 2,5 mm in accordance with IEC 60917-1
    EN 61076-4-101:2001 Connectors for electronic equipment - Part 4-101: Printed board connectors with assessed quality - Detail specification for two-part connector modules, having a basic grid of 2,0 mm for printed boards and backplanes in accordance with IEC 60917
    EN 60917-2-3 : 2006 Modular order for the development of mechanical structures for electronic equipment practices - Part 2-3: Sectional specification - Interface co-ordination dimensions for the 25 mm equipment practice - Extended detail specification - Dimensions for subracks, chassis, backplanes, front panels and plug-in units
    EN 61076-4-114:2003 Connectors for electronic equipment - Part 4-114: Printed board connectors - Detail specification for two-part connector with integrated shielding function having a grid of 1 mm x 1,5 mm
    EN 60917-2-4:2010 Modular order for the development of mechanical structures for electronic equipment practices - Part 2-4: Sectional specification - Interface coordination 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)
    EN 61076-4-103:1999 Connectors for use in d.c. low-frequency analogue and digital high speed data applications - Part 4-103: Printed board connectors with assessed quality - Detail specification for two-part connectors with shielding and a basic grid of 2,5 mm
    EN 61076-4-102:1997 Connectors with assessed quality, for use in d.c., low-frequency analogue and in digital high speed data applications - Part 4: Printed board connectors - Section 102: Detail specification for two-part single-pole connectors, for multiple uses on plug-in units, with pre-centring, coding and early mating features, having a metric grid in accordance with IEC 60917
    EN 61076-4-110:2002 Connectors for electronic equipment - Part 4-110: Printed board connectors with assessed quality - Detail specification for latched cable connector system having a basic grid of 2,0 mm including full shielding and latching function
    BS EN 61076-4-111:2002 (published 2002-08) Connectors for electronic equipment. Printed board connectors with assessed quality Detail specification for two-part power connector modules, for printed boards and backplanes having early mating features, and having a basic grid of 2,5 mm in accordance with IEC 60917-1
    BS EN 61076-4-102:1997 (published 1997-10) Connectors with assessed quality, for use in d.c., low-frequency analogue and in digital high speed data applications. Printed board connectors Detail specification for two-part single-pole connectors, for multiple uses on plug-in units, with pre-centring, coding and early mating features, having a metric grid in accordance with IEC 60917
    I.S. EN 61076-4:1998 CONNECTORS WITH ASSESSED QUALITY, FOR USE IN D.C., LOW FREQUENCY ANALOGUE AND IN DIGITAL HIGH-SPEED DATA APPLICATIONS - PART 4: SECTIONAL SPECIFICATION - PRINTED BOARD CONNECTORS
    CEI EN 61076-4-110 : 2003 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-110: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR LATCHED CABLE CONNECTOR SYSTEM HAVING A BASIC GRID OF 2,0 MM INCLUDING FULL SHIELDING AND LATCHING FUNCTION
    BS EN 61076-4-103:1999 (published 1999-06) Connectors with assessed quality, for use in d.c., low-frequency analogue and in digital high speed data applications. Printed board connectors Detail specification for two-part connectors with shielding and a basic grid of 2,5 mm - Cable to board connectors, shielded against EMC ,grid 2,5 mm,for high speed data rates,for use with printed boards
    BS EN 61076-4-110:2002 (published 2002-03) Connectors with assessed quality, for use in d.c., low-frequency analogue and in digital high speed data applications. Printed board connectors Detail specification for latched cable connector system having a basic grid of 2,0 mm including full shielding and latching function
    BS EN 61076-4-104:1999 (published 1999-08) Connectors for electronic equipment. Printed board connectors with assessed quality Detail specification for two-part modular connectors, basic grid of 2,0 mm, with terminations on a multiple grid of 0,5 mm - Detail specification for two part modular connectors (with optional shielding plates) for printed boards and backplanes, basic grid 2,0 mm, with terminations on a multiple grid of 0,5 mm
    BS EN 60297-3-106:2010 MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT - DIMENSIONS OF MECHANICAL STRUCTURES OF THE 482,6 MM (19 IN) SERIES - PART 3-106: ADAPTATION DIMENSIONS FOR SUBRACKS AND CHASSIS APPLICABLE WITH METRIC CABINETS OR RACKS IN ACCORDANCE WITH IEC 60917-2-1
    CEI EN 61076-4-115 : 2004 CONNECTORS FOR ELECTRONIC EQUIPMENT PART 4-115: PRINTED BOARD CONNECTORS BACKPLANE CONNECTOR FOR INFINIBAND EQUIPMENT
    CEI EN 61076-4-100 : 2003 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-100: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR MODULES HAVING A GRID OF 2,5 MM FOR PRINTED BOARDS AND BACKPLANES
    BS EN 60917-2-4:2010 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 2-4: SECTIONAL SPECIFICATION - INTERFACE COORDINATION 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)
    CEI EN 61076-4 : 1997 CONNECTORS WITH ASSESSED QUALITY, FOR USE IN D.C., LOW FREQUENCY ANALOGUE AND IN DIGITAL HIGH-SPEED DATA APPLICATIONS - PART 4: SECTIONAL SPECIFICATION PRINTED BOARD CONNECTORS
    CEI EN 61076-4-114 : 2004 CONNECTORS FOR ELECTRONIC EQUIPMENT PART 4-114: PRINTED BOARD CONNECTORS - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR WITH INTEGRATED SHIELDING FUNCTION HAVING A GRID OF 1 MM X 1,5 MM
    CEI EN 61076-4-108 : 2003 CONNECTORS FOR ELECTRONIC EQUIPMENT PART 4-108: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY DETAIL SPECIFICATION FOR CABLE-TO-BOARD CONNECTORS, WITH A MODULAR PITCH OF 25 MM AND INTEGRATED SHIELDING FUNCTION, APPLICABLE FOR TRANSVERSE PACKING DENSITY OF 15 MM, HAVING A BASIC GRID OF 2,5 MM IN ACCORDANCE WITH IEC 60917-1
    CEI EN 61587-1 : 2012 MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT - TESTS FOR IEC 60917 AND IEC 60297 SERIES - PART 1: ENVIRONMENTAL REQUIREMENTS, TEST SET-UP AND SAFETY ASPECTS FOR CABINETS, RACKS, SUBRACKS AND CHASSIS UNDER INDOOR CONDITION USE AND TRANSPORTATION
    BS EN 61076-4-115:2003 Connectors for electronic equipment. Printed board connectors with assessed quality Backplane connector for InfiniBand equipment
    BS EN 61587-1:2017 Mechanical structures for electronic equipment. Tests for IEC 60917 and IEC 60297 series Environmental requirements, test set-up and safety aspects for cabinets, racks, subracks and chassis under indoor condition use and transportation
    NF EN 61076 4 101 : 2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-101: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR MODULES, HAVING A BASIC GRID OF 2,0 MM FOR PRINTED BOARDS AND BLACKPLANES IN ACCORDANCE WITH IEC 60917
    I.S. EN 61076-4-102:1998 CONNECTORS WITH ASSESSED QUALITY, FOR USE IN D.C., LOW-FREQUENCY ANALOGUE AND IN DIGITAL HIGH SPEED DATA APPLICATIONS - PART 4: PRINTED BOARD CONNECTORS - SECTION 102: DETAIL SPECIFICATION FOR TWO-PART SINGLE-POLE CONNECTORS, FOR MULTIPLE USES ON PLUG-IN UNITS, WITH PRE-CENTRING, CODING AND EARLY MATING FEATURES, HAVING A METRIC GRID IN ACCORDANCE WITH IEC 60917
    CEI EN 60917-2-3 : 2007 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 2-3: SECTIONAL SPECIFICATION - INTERFACE CO-ORDINATION DIMENSIONS FOR THE 25 MM EQUIPMENT PRACTICE - EXTENDED DETAIL SPECIFICATION - DIMENSIONS FOR SUBRACKS, CHASSIS, BACKPLANES, FRONT PANELS AND PLUG-IN UNITS
    I.S. EN 61587-1:2017 MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT - TESTS FOR IEC 60917 AND IEC 60297 SERIES - PART 1: ENVIRONMENTAL REQUIREMENTS, TEST SET-UP AND SAFETY ASPECTS FOR CABINETS, RACKS, SUBRACKS AND CHASSIS UNDER INDOOR CONDITION USE AND TRANSPORTATION
    EN 61076-4:1996 Connectors with assessed quality, for use in d.c., low frequency analogue and in digital high-speed data applications - Part 4: Sectional specification - Printed board connectors
    CEI EN 61076-4-103 : 2001 CONNECTORS FOR USE IN D.C. LOW - FREQUENCY ANALOGUE AND DIGITAL HIGH SPEED DATA APPLICATIONS PART 4-103: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY DETAIL SPECIFICATION FOR TWO-PART CONNECTORS WITH SHIELDING AND A BASIC GRID OF 2,5 MM
    NF EN 61076 4 102 : 1998 CONNECTORS WITH ASSESSED QUALITY FOR USE IN D.C., LOW-FREQUENCY ANALOGUE AND IN DIGITAL HIGH SPEED DATA APPLICATIONS - PART 4: PRINTED BOARD CONNECTORS - SECTION 102: DETAIL SPECIFICATION FOR TWO-PART SINGLE-POLE CONNECTORS, FOR MULTIPLE USES ON PLUG-IN UNITS, WITH PRE-CENTERING, CODING AND EARLY MATING FEATURES, HAVING A METRIC GRID IN ACCORDANCE WITH IEC 60917
    BS EN 61076-4-108:2002 Connectors for electronic equipment. Printed board connectors with assessed quality Detail specification for cable-to-board connectors, with a modular pitch of 25 mm and integrated shielding function, applicable for transverse packing density of 15 mm, having a basic grid of 2,5 mm in accordance with IEC 60917-1
    I.S. EN 61076-4-110:2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-110: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR LATCHED CABLE CONNECTOR SYSTEM HAVING A BASIC GRID OF 2,0 MM INCLUDING FULL SHIELDING AND LATCHING FUNCTION
    I.S. EN 61076-4-104:1999 CONNECTORS FOR USE IN D.C. LOW-FREQUENCY ANALOGUE AND DIGITAL HIGH-SPEED DATA APPLICATIONS - PART 4-104: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR TWO-PART MODULAR CONNECTORS, BASIC GRID OF 2.0 MM WITH TERMINATIONS ON A MULTIPLE GRID OF 0.5 MM
    CEI EN 60917-2-4 : 2011 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 2-4: SECTIONAL SPECIFICATION - INTERFACE COORDINATION 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)
    EN 61587-1:2017 Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 series - Part 1: Environmental requirements, test set-up and safety aspects for cabinets, racks, subracks and chassis under indoor condition use and transportation
    I.S. EN 61076-4-114:2003 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-114: PRINTED BOARD CONNECTORS - DETAIL SPECIFICATION FOR TWO-PART CONNECTOR WITH INTEGRATED SHIELDING FUNCTION HAVING A GRID OF 1 MM X 1,5 MM
    CEI EN 61076-4-104 : 2001 CONNECTORS FOR USE IN D.C. LOW FREQUENCY ANALOGUE AND DIGITAL HIGH SPEED DATA APPLICATIONS PART 4-104: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY DETAIL SPECIFICATION FOR TWO-PART MODULAR CONNECTORS, BASIC GIRD OF 2,0 MMS WITH TERMINATIONS ON A MULTIPLE GIRD OF 0,5 MM
    CEI EN 61076-4-102 : 1998 CONNECTORS WITH ASSESSED QUALITY, FOR USE IN D.C., LOW FREQUENCY ANALOGUE AND IN DIGITAL HIGH SPEED DATA APPLICATIONS - PART 4: PRINTED BOARD CONNECTORS SECTION 102: DETAIL SPECIFICATION FOR TWO-PART SINGLE-POLE CONNECTORS, FOR MULTIPLE USES ON PLUG-IN UNITS, WITH PRE-CENTRING, CODING AND EARLY MATING FEATURES, HAVING A METRIC GRID IN ACCORDANCE WITH IEC 60917
    I.S. EN 61076-4-115:2003 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-115: PRINTED BOARD CONNECTORS - BACKPLANE CONNECTOR FOR INFINIBAND EQUIPMENT
    BS EN 61076-4-100:2002 (published 2002-01) Connectors with assessed quality, for use in d.c., low-frequency analogue and in digital high speed data applications. Printed board connectors Detail specification for two-part connector modules having a grid of 2,5 mm for printed boards and backplanes
    BS EN 61076-4-114:2003 (published 2003-06) Connectors for electronic equipment. Printed board connectors with assessed quality Detail specification for two-part connector with integrated shielding function having a grid of 1 mm x 1,5 mm
    I.S. EN 61076-4-108:2002 CONNECTORS FOR ELECTRONIC EQUIPMENT - PART 4-108: PRINTED BOARD CONNECTORS WITH ASSESSED QUALITY - DETAIL SPECIFICATION FOR CABLE-TO-BOARD CONNECTORS, WITH A MODULAR PITCH OF 25 MM AND INTEGRATED SHIELDING FUNCTION, APPLICABLE FOR TRANSVERSE PACKING DENSITY OF 15 MM, HAVING A BASIC GRID OF 2,5 MM IN ACCORDANCE WITH IEC 60917-1
    EN 61076-4-100:2001 Connectors for electronic equipment - Part 4-100: Printed board connectors with assessed quality - Detail specification for two-part connector modules having a grid of 2,5 mm for printed boards and backplanes
    EN 61076-4-115:2003 Connectors for electronic equipment - Part 4-115: Printed board connectors - Backplane connector for InfiniBand equipment
    NF EN 60917-1 : 99 AMD 1 2001 MODULAR ORDER FOR THE DEVELOPMENT OF MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT PRACTICES - PART 1: GENERIC STANDARD
    EN 61076-4-104:1999 Connectors for use in d.c. low-frequency analogue and digital high speed data applications - Part 4-104: Printed board connectors with assessed quality - Detail specification for two-part modular connectors, basic grid of 2,0 mm, with terminations on a multiple grid of 0,5 mm
    EN 60297-3-106:2010 Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-106: Adaptation dimensions for subracks and chassis applicable with metric cabinets or racks in accordance with IEC 60917-2-1

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60916:1988 Mechanical structures for electronic equipment - Terminology
    IEC 60917-0:1989 Modular order for the development of mechanical structures for electronic equipment practices - Part 0: Guide for the users of IEC 917
    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 60917-2:1992 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
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