IEC 60297 3 108 Edition 1 0 2014 09 INTERNATIONAL STANDARD NORME INTERNATIONALE Mechanical structures for electronic equipment – Dimensions of mechanical structures of the 482,6 mm (19 in) series – Pa[.]
General
Figure 3 depicts the RA-type subrack, characterized by the size of the first printed board's position relative to the first pitch line (refer to detail A) A maximum deflection of 0.2 mm is allowed for the load-bearing members.
Dimensions in millimetres, tolerances are non-cumulative
First printed board position ỉ4,0 ± 0,1 x 3,2 ± 0,1 receptacle holes for front panel alignment pins on lower and upper horizontal member
1 If this dimension needs to be increased increments of 5,08mm shall be used, based on the dimension
2 May be applied by press-in nuts
Figure 3 –RA–type subrack front mounting dimensions
RA–type subrack rear mounting dimensions
Figure 4 illustrates the rear mounting dimensions with the possible mounting holes for backplanes
Dimensions in millimetres, tolerances are non-cumulative
M3 threaded holes shall be applied for backplane mounting
First possible backplane mounting position M3
Figure 4 – RA–type subrack rear mounting dimensions
General
Figure 5 depicts the RB-type subrack, characterized by the size of the first printed board's position relative to the initial pitch line (refer to Detail B) A maximum deflection of 0.2 mm is allowed for the load-bearing members.
Dimensions in millimetres, tolerances are non-cumulative
First printed board position ỉ4,0 ± 0,1 x 3,2 ± 0,1 receptacle holes for front panel alignment pins on lower and upper horizontal member.
1 If this dimension needs to be increased increments of 5,08 mm shall be used, based on the dimension 4,07 mm as in IEC 60297-3-101
2 Press-in nuts may be applied
Figure 5 – RB–type subrack front mounting dimensions
RB–type subrack rear mounting dimensions
Figure 6 illustrates the rear mounting dimensions with the possible mounting holes for backplanes
Dimensions in millimetres, tolerances are non-cumulative
M3 threaded holes shall be applied for backplane mounting
First possible backplane mounting position M3
Figure 6 – RB–type subrack rear mounting dimensions
The placement of guide rails is consistently aligned with the receptacle holes for the alignment pin of the plug-in unit, as illustrated in Figures 3 and 5, Details A and B.
Dimensions in millimetres, tolerances are non-cumulative
1 Dimension D 1 and D 2 depend on printed board depth and connector type
2 Position of an optional ESD contact, connecting both sides of the printed board (ESD = Electrostatic discharge)
3 First guide rail on left
Figure 7 –R–type subrack guide rails
8 Electromagnetic shielding provisions and mounting flanges
Figure 8 depicts the front mounting plane of the subrack, highlighting the conductive areas for attaching front panels and the vertical connections on the left and right side panels Electromagnetic shielding (EMC) at the rear of the subrack can be achieved through backplanes or user-defined covers For testing EMC shielding performance, refer to IEC 61587-3.
The mounting flanges may be recessed by n × 25 mm
Uncompressed gasket min 0,5 mm max 1,3 mm
Mounting flanges may be recessed by n x 25 mm
Front view Dimensions in millimetres, tolerances are non-cumulative
Figure 8 –R–type subrack front attachment plane and mounting flanges
General
Chassis integrated subracks are common for electronic equipment where air ducting, cooling devices or space for cabling are incorporated into one mechanical unit.
RA– C–type chassis/subrack
The RA–C type chassis/subrack, in which RA – type subrack is integrated, defines the chassis dimensions (see Figure 9)
Front view Dimensions in millimetres, tolerances are non-cumulative
1 Chassis height reduced for the mounting of chassis supports (see Annex A)
2 First guide rail position (see Figure 2)
Figure 9 – RA – C type chassis/subrack
RB–C–type chassis/subrack
The RB–C–type chassis/subrack, which incorporates the RB–type subrack, establishes the chassis dimensions (refer to Figure 10) The subrack can be positioned asymmetrically within these dimensions For comprehensive chassis dimensioning, consult IEC 60297-3-105 (plus n × 1U).
1 Chassis height reduced for the mounting of chassis supports (see Annex A)
2 First guide rail position (see Figure 4)
Figure 10 –RB–C – type chassis/subrack
10 Front panel/plug-in unit compatible with RA – type subrack
Figure 11 illustrates the frontpanel/plug-in unit compatible with RA–type subrack and the position of a printed board
Uncompressed gasket min 0,5 mm max 1,3 mm
Dimensions in millimetres, tolerances are non-cumulative
1 May be increased by n x 5,08 mm
2 Optional cut outs if injector/extractor handles are used
Figure 11 – Front panel/ plug-in unit compatible with RA – type subrack
11 Front panel/plug-in unit compatible with RB – type subrack
Figure 12 illustrates the frontpanel/plug-in unit compatible with RB–type subrack and the position of a printed board
Dimensions in millimetres, tolerances are non-cumulative
1 May be increased by n x 5,08 mm
2 Optional cut outs if injector/extractor handles are used
Figure 12 – Front panel/ plug-in unit compatible with RB – type subrack
Figure 13 depicts the injector/extractor handle, which has a maximum single handle lever dimension designed to withstand connector forces of up to 350 N For higher connector forces, the handle lever specifications must be mutually agreed upon by the supplier and user The handle must allow for a minimum travel of 7.5 mm during extraction and insertion Although the handle may feature a self-locking function, the secure attachment of front panels should be ensured using M3 screws Additionally, the handle lever can be oriented either vertically or horizontally, as illustrated in Figure 13.
Alternative handle lever design, horizontal
Dimensions in millimetres, tolerances are non-cumulative
Injector/extractor handle position within the subrack
Figure 14 illustrates the printed board dimensions
Dimensions in millimetres, tolerances are non-cumulative
1 Keep out area for frontpanel attachment and components
Table 1 contains the dimensions of subracks and plug-in units
NOTE The dimensions H1 and H10 comply with IEC 60297-3-101
Dimensions of Table 1
U: Coordination height unit of 44,45 mm (1,75 in) See IEC 60297-3-100
H1: Subrack heights (equal to dimension E of IEC 60297-3-100)
H5: Subrack vertical aperture for plug-in units
H6: Mounting centre distance for front plug-in units and panels, front and rear
H8: Plug-in unit panel height
H10: Printed board height into subrack guidance height
HP: The subrack aperture is theoretically divided into n × horizontal pitches (HP) of
The plug-in unit front panel width is divided into n × 5,08 mm horizontal pitches
D1: Subrack dimension between front attachment plane and backplane attachment plane
Chassis/subrack mounting support in cabinets
Figure A.1 illustrates the mounting of a chassis with integrated subrack into a cabinet using mounting supports for heavy load and/or in case of dynamic stress
Chassis mounting support fixed to the cabinet uprights (see IEC 60297-3-100)
Example of a chassis with integrated subrack (see Figures 8 and 9) max 2,0
Figure A.1 – Subrack/chassis mounting support
Static and dynamic load test
For the proof of mechanical integrity the chassis/subrack loaded with plug-in units should be tested in accordance with IEC 61587-1 (static load, vibration and shock).
Seismic test
In case of seismic requirements the chassis/subrack loaded with plug-in units should be tested in accordance with IEC 61587-5 (resistance of the mechanical structure against seismic impact).
Electromagnetic shielding performance test
In case of EMC requirements (electromagnetic compatibility) the chassis/subrack and plug-in units should be tested in accordance with IEC 61587-3 (shielding performance level of the mechanical design)
Air ducting
Figure C.1 illustrates a chassis with integrated subrack The air ducting shall be from the front inlet 2), distributed across the depth, vertical up through the subrack 1) and out at the rear 3)
The height dimension of the subrack n × U is influenced by the lower and upper compartments, which accommodate air volume and fans According to IEC TS 62610-2, the preferred solution for air ducting is from front to rear.
1) Subrack with plug-in units
2) Compartment with louvered front for air inlet
3) Compartment with louvered rear for air outlet
Comparison of IEC 60297-3-101 with IEC 60297-3-108
Table D.1 – Comparison of dimensions and features
Subrack dimensions (mm) Compatible with
H5: Subrack vertical aperture opening for plug-in units n × 44,45 – 21,35 – n × 44,45 – 33,00
H6: Mounting centre distance for plug-in units, front panels, backplanes and connector supports n × 44,45 – 10,85 – n × 44,45 -19,80
H8: Plug-in unit front panel height n × 44,45 – 4,80 – n × 44,45 – 13,80
H10: Printed board height or plug-in unit into subrack guidance height n × 44,45 – 33,35 Yes –
Subrack aperture definitions (HP) n × 5,08 Yes –
Subrack depth (D1 – D4, RD1, RD3 and
Fixing screws for plug-in units, front panels, backplanes and connector supports
Alignment pins for plug-in units Auxiliaries according to IEC 60297-3-103
Front panels for plug-in units - – Yes
Positions of fixing holes for front panel - – Yes
Printed board mounting to front panel, vertical 88,90 + n × 44,45 - H 10 – 8,0
Printed board mounting to front panel, horizontal
Injector/extractor handle for plug-in units Auxiliaries according to IEC 60297-3-102
Subrack mounting flanges - May be recessed by n × 25 mm (Rear mount supports can be arranged)
4 Vue d'ensemble de la disposition 34
5.2 Dimensions de montage arrière d'un bac de type RA 37
6.2 Dimensions de montage arrière d'un bac de type RB 39
7 Rails de guidage d'un bac de type R 39
8 Dispositions pour blindage électromagnétique et brides de montage 40
9.2 Châssis/bac de type RA-C 42
9.3 Châssis/bac de type RB-C 42
10 Panneau avant/bloc enfichable compatibles avec un bac de type RA 43
11 Panneau avant/bloc enfichable compatibles avec un bac de type RB 45
13 Dimensions de la carte imprimée 46
15.1 Plan de référence (donné dans les cases carrées des figures) 48
Annexe A (normative) Support de montage 49
A.1 Support de montage du châssis/du bac dans les armoires 49
B.1 Essai de charges statique et dynamique 50
B.3 Essais de performance du blindage électromagnétique 50
Annexe D (informative) Comparaison entre l'IEC 60297-3-101 et l'IEC 60297-3-108 52
Figure 2 – Disposition d'un bac de type R et de blocs enfichables 35
Figure 3 – Dimensions de montage avant d'un bac de type RA 36
Figure 4 – Dimensions de montage arrière d'un bac de type RA 37
Figure 5 – Dimensions de montage avant d'un bac de type RB 38
Figure 6 – Dimensions de montage arrière d'un bac de type RB 39
Figure 7 – Rails de guidage d'un bac de type R 40
Figure 8 – Plan de fixation avant et brides de montage pour un bac de type R 41
Figure 9 – Châssis/bac de type RA-C 42
Figure 10 – Châssis/bac de type RB-C 43
Figure 11 – Panneau avant/bloc enfichable compatibles avec un bac de type RA 44
Figure 12 – Panneau avant/bloc enfichable compatibles avec un bac de type RB 45
Figure 14 – Dimensions de la carte imprimée 47
Figure A.1 – Support de montage du bac/châssis 49
Figure C.1 – Exemple de gestion thermique 51
Tableau D.1 – Comparaison des dimensions et des caractéristiques 52
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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La Norme internationale IEC 60297-3-108 a été établie par le sous-comité 48D: Structures mécaniques pour équipement électronique, du comité d'études 48 de l'IEC: Composants électromécaniques et structures mécaniques pour équipements électroniques
Le texte de cette norme est issu des documents suivants:
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant abouti à l'approbation de cette norme
Cette publication a été rédigée selon les Directives ISO/IEC, Partie 2
A comprehensive list of all parts of the IEC 60297 series, published under the general title "Mechanical structures for electronic equipment – Dimensions of mechanical structures of the 482.6 mm (19 inches) series," is available on the IEC website.
The committee has determined that the content of this publication will remain unchanged until the stability date specified on the IEC website At that time, the publication will be updated accordingly.
• remplacée par une édition révisée, ou
IMPORTANT – The "colour inside" logo on the cover of this publication indicates that it contains colors deemed essential for a better understanding of its content Users are therefore encouraged to print this publication using a color printer.
The purpose of this standard is to establish alternative dimensions and characteristics for associated plug-in trays and blocks, in comparison to IEC 60297-3-101 These alternatives enable more robust designs for the load-bearing elements of the tray Additionally, the plug-in blocks feature alignment pins and are secured with M3 screws.
Les bacs intégrés au châssis sont également traités dans la présente norme
The key differences in dimensions and features compared to IEC 60297-3-101 are as follows: a) The height of the tray opening has been reduced to increase the size of the upper and lower elements, which are critical for load support b) There is an integrated alignment between the tray and the plug-in blocks, along with insertion and extraction devices for these blocks c) The mounting flanges of the trays are retractable, meeting the requirements for heavy tray installation and allowing positioning relative to the center of gravity d) Trays are integrated into the chassis to optimize thermal management characteristics e) A comparison of dimensions and features with IEC 60297-3-101 is provided in Annex D, Table D.1 Refer to Figure 1 below for an application image of the trays according to this standard.
Facteur de forme conventionnel et poids normal, pour des applications de petits à moyens volumes, par exemple informatique industrielle générale et traitement des données
Petit facteur de forme et poids léger, pour des applications de grands volumes, par exemple systèmes intégrés, systèmes informatiques mobiles/omniprésents
Poids lourd et grand facteur de forme, pour des applications de grands volumes, par exemple serveurs de l'informatique en nuage, serveurs de télécommunications
Système intégré Système 19 pouces à l'échelle réelle Système 19 pouces renforcé
Facteur de pondération des bacs et blocs enfichables
Fact eu r d e c om pl exi té m écan iq ue des b acs et b lo cs en fich ab les E lev é Fai bl e
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
La présente partie de l'IEC 60297 donne les dimensions et caractéristiques des bacs de type
The R-type enclosures and plug-in blocks are enhanced versions of the 482.6 mm (19-inch) mechanical structures, designed to offer increased resistance to vibrations and shocks, as well as improved electromagnetic compatibility (EMC) for use in harsher environments These enclosures adhere externally to the IEC 60297-3-100 standard, but are largely incompatible internally with IEC 60297-3-101 R-type enclosures, chassis-integrated enclosures, and plug-in blocks feature dimensions and characteristics that provide a higher level of robustness compared to IEC 60297-3-101, with testing and load definitions selected from IEC 61587-1 and IEC 61587-5.
The following documents are referenced normatively, either in whole or in part, within this document and are essential for its application For dated references, only the cited edition is applicable For undated references, the latest edition of the referenced document applies, including any amendments.