IEC 60297-3-107:2012

IEC 60297-3-107 ®
Edition 1.0 2012-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-107: Dimensions of subracks and plug-in units, small form factor

Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-107: Dimensions des bacs et blocs enfichables de petit facteur de forme

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IEC 60297-3-107 ®
Edition 1.0 2012-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical

structures of the 482,6 mm (19 in) series –

Part 3-107: Dimensions of subracks and plug-in units, small form factor

Structures mécaniques pour équipements électroniques – Dimensions des

structures mécaniques de la série 482,6 mm (19 pouces) –

Partie 3-107: Dimensions des bacs et blocs enfichables de petit facteur de forme

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 31.240 ISBN 978-2-88912-844-0

– 2 – 60297-3-107  IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 7
3 Arrangement overview (4U shown) . 8
4 Subrack dimensions . 9
4.1 Subrack dimensions front mounting area . 9
4.2 Subrack dimensions, rear view, backplane mounting area . 12
5 Plug-in unit dimensions . 13
6 Connector and related printed board dimensions . 14
6.1 Connector according to PICMG-MicroTCA.0/ IEC 61076-4-116, fixed board
connector and related printed board dimensions . 14
6.1.1 PICMG- MicroTCA.0/ IEC 61076-4-116 connector, isometric view . 14
6.1.2 Connector according to PICMG- MicroTCA.0/ IEC 61076-4-116, fixed
board connector and related printed board – arrangement overview . 14
6.1.3 Printed board dimensions . 15
6.1.4 Printed board dimensions, 4U example . 16
6.1.5 Connector according to PICMG-MTCA.0, fixed board connector
dimensions . 17
6.2 Two part connector according to IEC 61076-4-116 and related printed board
dimensions . 17
6.2.1 Two part connector, isometric view . 17
6.2.2 Two part connector, arrangement overview . 18
6.2.3 Two part connector, printed board dimensions . 18
6.2.4 Two part connector, fixed board connector dimensions . 19
6.3 Two part connector with PIU PB component side attachment features . 19
6.3.1 Two part connector, arrangement overview . 19
6.3.2 Two part connector, printed circuit board dimensions, 2 U . 19
6.3.3 Two part connector, connector mounted on backplane, 2 U . 20
7 Backplane dimensions . 21
7.1 Backplane dimensions using two part connector according to IEC 61076-4-116 . 21
8 Subrack and plug-in units with electromagnetic shielding (EMC) provisions . 23
8.1 General . 23
8.2 Subrack EMC provisions . 23
8.3 Plug-in unit and filler panels EMC provisions . 24
9 Subrack and plug in units electrostatic discharge provisions (ESD) . 24
9.1 General . 24
9.2 Subrack ESD provisions . 25
9.3 Plug–in unit ESD provisions, front mounted . 26
10 Nomenclature . 27
Annex A (informative) Connector hole pattern at the backplane . 29
Annex B (informative) Rear mounted plug-in unit implementation . 30
Annex C (informative) Hot swap latch function . 32
Annex D (informative) Subrack latch mechanism interface dimensions for ruggedized
applications . 33
Annex E (informative) Subrack ESD contact interface dimensions . 34

60297-3-107  IEC:2012 – 3 –
Figure 1 – Arrangement overview . 8
Figure 2 – Subrack dimensions, front view . 10
Figure 3 – Subrack dimensions, side view . 11
Figure 4 – Subrack dimensions, top view . 12
Figure 5 – Subrack dimensions, rear view . 12
Figure 6 – Plug-in unit dimensions . 13
Figure 7 – PICMG- MicroTCA.0/ IEC 61076-4-116 connector, isometric view . 14
Figure 8 – PICMG- MicroTCA.0/ IEC 61076-4-116 fixed board connector, arrangement
overview – Top view . 14
Figure 9 – Printed board dimensions . 15
Figure 10 – Printed board dimensions, 4U example . 16
Figure 11 – Connector according to PICMG- MTCA.0, fixed board connector
dimensions . 17
Figure 12 – Fixed board and free board connector – Isometric view . 17
Figure 13 – Two part connector, arrangement overview – Top view . 18
Figure 14 – Two part connector, printed board dimensions . 18
Figure 15 – Two part connector, arrangement overview – Top view . 19
Figure 16 – Two part connector, dimensions, 2 U . 19
Figure 17 – Two part connector, connector mounted on backplane dimensions, 2 U . 20
Figure 18 – Backplane dimensions. 22
Figure 19 – Subrack EMC dimensions . 23
Figure 20 – Plug-in unit EMC dimensions. 24
Figure 21 – Subrack ESD provision . 25
Figure 22 – Plug-in unit ESD provision . 26
Figure A.1 – Connector pin location according to IEC 61076-4-116, front view . 29
Figure B.1 – Depth dimension subrack type 1, side view . 30
Figure B.2 – Depth dimension subrack type 2, side view . 30
Figure B.3 – Depth dimension subrack type 3, side view . 31

Table 1 – Height dimensions . 26
Table 2 – Depth dimensions . 27

– 4 – 60297-3-107  IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-107: Dimensions of subracks and
plug-in units, small form factor

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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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60297-3-107 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/492/FDIS 48D/501/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.

60297-3-107  IEC:2012 – 5 –
A list of all parts of IEC 60297 series, under the general title Mechanical structures for
electronic equipment – Dimensions of mechanical structures of the 482,6 mm (19 in) series,
can be found of the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.
– 6 – 60297-3-107  IEC:2012
INTRODUCTION
This standard provides for an alternative/smaller form factor of plug-in units as defined in
IEC 60297-3-101.
New technologies requiring smaller plug-in unit form factors used in 19 in equipment practice
are rapidly gaining acceptance.
Recognizing this development it became obvious that a generic interface standard would be
an advantage to the industry.
This standard is based upon and coordinated with the plug-in unit form factor as defined in
AMC.0 and MicroTCA developed by PICMG (PCI Industrial Computers Manufacturer Group).
By making critical interface dimensions available and permitting the use of alternative
connectors to the industry (beyond AMC.0 and MicroTCA) multiple product solutions may
make use of this technology and will increase the overall market acceptance, increase
availability, and reduce cost.
In order to meet the requirements of small form factor plug-in units within the subrack the
interface dimensions required differ from IEC 60297-3-101. This standard defines these small
form factor interface dimensions.
The small form factor generic dimensions are based on and coordinated with AMC.0 and
MicroTCA.
Since the AMC.0 and MicroTCA Specification defines only a limited range of connectors this
standard opens the possible use of other suitable connectors.

60297-3-107  IEC:2012 – 7 –
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-107: Dimensions of subracks and
plug-in units, small form factor

1 Scope and object
This part of IEC 60297 defines the interface dimensions between subracks and associated
plug-in units using connectors as defined in PICMG-MTCA.0 (Fixed board, see Figure 7) and
IEC 61076-4-116 (Two part, see Figure 12) and other two part connectors, (see Figure 15).
For mechanical and climatic tests refer to IEC 61587-1.
For electromagnetic shielding performance tests refer to IEC 61587-3.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60297-3-100: Mechanical structures for electronic equipment - Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-100: Basic dimensions of front panels,
subracks, chassis, racks and cabinets
IEC 61076-4-116: Connectors for electronic equipment – Product requirements – Printed
board connectors: Detail specification for a high-speed two-part connector with integrated
shielding function (to be published)
PICMG AMC.0: Advanced Mezzanine Card Specification
PICMG MicroTCA.0: Micro Telecommunications Computing Architecture
PICMG MicroTCA.1: Air Cooled Rugged MicroTCA Specification

– 8 – 60297-3-107  IEC:2012
3 Arrangement overview (4U shown)
Typical subrack
Left side of plug-in unit =
component side
4U plug-in unit with 4U plug-in unit with
4U power unit
PICMG-AMC.0 connector
two part connector (connector not shown)
according to
IEC 61076-4-116
IEC  2770/11
Figure 1 – Arrangement overview

60297-3-107  IEC:2012 – 9 –
4 Subrack dimensions
4.1 Subrack dimensions front mounting area
482,6 ± 0,4
≥ 428,08
D
C
Z 426,72
B
A
0,2  G
B
M2
Mounting positions M3;
L
front and rear
First possible guide
rail position (connector
See Figure 4 dependent)
A
A
G
0,2  D
Y
≥ 1,35
B See Figure 3
5,90
4,26 5,08
82 ×        = 416,56
mounting positions M3 and
First M3 mounting position   possible guide rail mounting positions
and first possible
centreline of guide rail /
printed circuit board of
IEC  2771/11
plug-in unit
Figure 2a – Front area dimensions
H 7
H5
H6
H1
U
– 10 – 60297-3-107  IEC:2012
Detail “Z“
14,7 ± 1,2
Detail “Y“
M2
A
Both hole 4,26
types are
permitted
L 2,1 ± 0,1
G
The guide rail shall be
made of electrically
insulated material
5,08
10,3 ± 0,4
13,5 ± 0,4
IEC  2772/11
Figure 2b – Mounting holes and guide rail dimensions
Figure 2 – Subrack dimensions, front view

Cross Section B - B
≤ D2
≥ 16,8
Height separation plane
Back-
plane
X
L
Guide rail
Fixed board
Connector
R
See Figure 18
≤ D3
D1
E F
IEC  2773/11
Figure 3a – Guide rail dimensions
H1
H3 H2
H4
6,8 +0,5
6,8 +0,5
≤ 1,65
H6
U
60297-3-107  IEC:2012 – 11 –
E
Dimensions for ESD
provisions see Fig. 21 Other
application specific detail
may apply. Examples: PICMG-
AMC.0; PICMG-MTCA.0 and
PICMG-MTCA.1
≤ D2
Areas provided L Application specific detail may

apply.
for plug-in unit
features Examples: PICMG-AMC.0 and
PICMG-MTCA.0 and PICMG-
≤ D3
M3 MTCA.1
Guide rail
+10
10 to first thread
> 2,0 Threads
> 6,1
clearance
D1
Detail “X“
E
IEC  2774/11
Figure 3b – Mounting hole dimensions

Figure 3 – Subrack dimensions, side view
+0,3
Ø3,2
0,0
H 6
H5
≥ 3,1
– 12 – 60297-3-107  IEC:2012
Cross Section A – A (see Figure 2)
≤ 449 (incl.fixing hardware)
Detail „W“
F
Optional designs
Backplane
Sidepanel may exceed D1
attachment
(e.g. for EMC shielding )
plane
C
D
Typical
guide rail
W
⊕  0,6   E
E E
A
Area provided for
Front
E
plug-in unit features
attachment plane
IEC  2775/11
Figure 4 – Subrack dimensions, top view
4.2 Subrack dimensions, rear view, backplane mounting area
426,72
M3 threaded holes shall
be applied for backplane
L
mounting
M2
C
D
≥ 1,35
4,26
5,90
5,08
82 ×         = 416,56
Backplane mounting points M3
First possible backplane
A
B
mounting position M3
IEC  2776/11
Figure 5 – Subrack dimensions, rear view
H 6
60297-3-107  IEC:2012 – 13 –
5 Plug-in unit dimensions
5,08
(n×     -1,36) ± 0,2
12,30 ± 0,3
Plug-in unit
printed board
5,08
n×
V
Plug-in unit
front panel
L
G1
User specific
4,55
K
M
IEC  2777/11
Figure 6a – Front panel dimensions

M
Detail „V“
< 6,0 fastened
< 1,0 unfastened
K
M3
Retention device shall
allow a permanent
bottoming (J-J1=0) of
0,3  M
the edge board
connector and the
equivalent two part
connector as defined in
IEC 61076-4-116 at a
max. force of 5 N
IEC  2778/11
Figure 6b – Retention device dimensions
Figure 6 – Plug-in unit dimensions

H12
H9
H8
– 14 – 60297-3-107  IEC:2012
6 Connector and related printed board dimensions
NOTE The MTCA.0 fixed board connectors is identical with the fixed board connector of IEC 61076-4-116.
6.1 Connector according to PICMG-MicroTCA.0/ IEC 61076-4-116, fixed board
connector and related printed board dimensions
6.1.1 PICMG- MicroTCA.0/ IEC 61076-4-116 connector, isometric view

Printed board
Example for guide
of printed board
Fixed board
connector
Backplane
IEC  2779/11
Figure 7 – PICMG- MicroTCA.0/ IEC 61076-4-116 connector, isometric view
6.1.2 Connector according to PICMG- MicroTCA.0/ IEC 61076-4-116, fixed board
connector and related printed board – arrangement overview
J and J1
M and M1 and M2
Plug-in unit
PICMG-MTCA.0
Fixed Board Connector
Backplane
186,65
F1
K
IEC  2780/11
Figure 8 – PICMG- MicroTCA.0/ IEC 61076-4-116 fixed board connector,
arrangement overview – Top view

60297-3-107  IEC:2012 – 15 –
6.1.3 Printed board dimensions

≤ D6
S
Detail „U“
Both sides (top and bottom)
Card guide keep out
zones - both sides
Connector
component
keep out zones – Card edge
J
both sides
U
L
7,90
R1,0
45°
G1
R0,5
≤ D4
R0,5
D5
+2,8
10,7
0,0
J
K
IEC  2781/11
Figure 9a – Printed board dimensions, side view

View „S“
Detail „T“
J
K
0,4 ± 0,1
M
M
T
J
Card edge
45° ± 2°
IEC  2782/11
Figure 9b – Printed board dimensions, top view
Figure 9 – Printed board dimensions

1,6 ± 0,16
(PCB)
≥ 1,70
≥ 1,70
36,75
H13
H10
0,6
(4,25)
H13
H10
– 16 – 60297-3-107  IEC:2012
6.1.4 Printed board dimensions, 4U example
+2,8
10,7
0,0
7,3
6,7
Connector
component
Missing dimensions:
keep out zones –
see Figure 9:
both sides
Printed board dimensions
Zone X:
May be used for
additional connectors
not defined in this
standard. This (these)
additional connector(s)
may plug into a
common backplane.
Connector
component
keep out zones –
both sides
L
Card edge
G1
D5
J
K
IEC  2783/11
Figure 10 – Printed board dimensions, 4U example
36,75
≥ 42,50
≤107,50
H13
H10
60297-3-107  IEC:2012 – 17 –
6.1.5 Connector according to PICMG-MTCA.0, fixed board connector dimensions
J and J1
F
(10,60 max.)
M and M1
Optional PICMG-MTCA.0
Protrusion fixed board connector
L and L1 L and L1
Backplane
G1
(7,50 max.)
(7,10 max.)
Plug-in unit
(5,80 ± 0,10 )
IEC  2784/11
Figure 11 – Connector according to PICMG- MTCA.0, fixed board connector dimensions
6.2 Two part connector according to IEC 61076-4-116 and related printed board
dimensions
6.2.1 Two part connector, isometric view
Printed board
Example for guide
of printed board
Free board
connector
Fixed board
connector
Backplane
IEC  2785/11
Figure 12 – Fixed board and free board connector – Isometric view
(74,90 max )
– 18 – 60297-3-107  IEC:2012
6.2.2 Two part connector, arrangement overview
K
J and J1
M and M1 and M2
Backplane
Free board
Plug-in unit
connector
F1
Fixed board
connector
IEC  2786/11
Figure 13 – Two part connector, arrangement overview – Top view
6.2.3 Two part connector, printed board dimensions
≤ D6
Missing PCB dimensions:
Vendor specific
Card guide keep out
zones - both sides
Free board
connector
L and L1
G1
≤ D4
F1
D5
K
J and J1
M and M1 and M2
Backplane
Free board Fixed board
Plug-in unit
connector connector
IEC  2787/11
Figure 14 – Two part connector, printed board dimensions
≥ 1,70
≥ 1,70
(70,00 max.)
60297-3-107  IEC:2012 – 19 –
6.2.4 Two part connector, fixed board connector dimensions
See 6.1.5: Fixed board connector dimensions
6.3 Two part connector with PIU PB component side attachment features
NOTE Connectors typically attached to a PIU PB on one of the outer component surfaces are based on a PB
thickness of 1,6 mm nominal for the purpose of this standard. See Figure 15.
6.3.1 Two part connector, arrangement overview

F1
K
Fixed connector
mounted
on backplane
Component side
M and M2
Connector mounted
Backplane
on PIU
Power Unit
IEC  2788/11
Figure 15 – Two part connector, arrangement overview – Top view
6.3.2 Two part connector, printed circuit board dimensions, 2 U
1,5 × 45°
Module face plate
dimensions,
see 5.1
Free connector
dimensions: User
specific
L and L1
Missing printed
board dimensions
see 6.1.2
User specific
Backplane
F1
User specific
186,65
K
Free connector
M
IEC  2789/11
Figure 16 – Two part connector, dimensions, 2 U
1,6 ± 0,16
(PB)
– 20 – 60297-3-107  IEC:2012
6.3.3 Two part connector, connector mounted on backplane, 2 U

Fixed connector
dimensions user
specific
L and L1
Backplane
F1
M
IEC  2790/11
Figure 17 – Two part connector, connector mounted on backplane dimensions, 2 U

60297-3-107  IEC:2012 – 21 –
7 Backplane dimensions
7.1 Backplane dimensions using two part connector according to IEC 61076-4-116
Figure 18 illustrates the backplane heights and width dimensions as well as the first connector
position, using two part connector according to IEC 61076-4-116.

View R (see Figure 3)
< 426,72
< 4,26
+0,3
Ø3,2
0,0
M and M1
L and L1
First
possible
mounting
position
5,08
5,08
n ×
possible mounting positions
4,26
A
Fixed board connector
according to
IEC 61076-4-116
J1
F1
IEC  2791/11
Figure 18a – 3U backplane dimensions, for 2 U plug-in units
H11 = 84,00
User specific
47,5
H14 =95,00
– 22 – 60297-3-107  IEC:2012
< 426,72
< 4,26
+0,3
Ø3,2
0,0
First
possible
M and M1
mounting
position
L
L1
5,08
5,08
n ×
possible mounting positions
4,26
A
Fixed board connector
according to
IEC 61076-4-116
J1
F1
IEC  2792/11
Figure 18b – 4U Backplane dimensions
Figure 18 – Backplane dimensions

H11 = 159,00
User specific
47,5
H14 = 170,00
60297-3-107  IEC:2012 – 23 –
8 Subrack and plug-in units with electromagnetic shielding (EMC) provisions
8.1 General
The dimensional specifications of electromagnetic shielding provisions for subracks and
associated plug-in units are restricted to the subrack and plug-in unit interfaces. The basic
dimensions are in accordance with Clauses 4 and 5 of this standard. Only the extended
dimensions of the shielding interfaces are subject of this clause. Materials of the shielding
interfaces should be chosen for adequate contact properties.
8.2 Subrack EMC provisions
For corresponding plug-in unit dimensions, see 5.1.
F - F
EMC gasket
C
D D - D
Front view
C - C
F F
Conductive surface
E E
Conductive area
min. 12,0
C D
T
EMC gasket only
T
2,54
-0,5
E - E
E
Centerline EMC gasket
IEC  2793/11
Figure 19 – Subrack EMC dimensions
6,13 ± 0,5
≥ 10,5 ≥ 10,5
H5
max. 12,0
– 24 – 60297-3-107  IEC:2012
8.3 Plug-in unit and filler panels EMC provisions
The basic dimensions are in accordance with Clause 5 of this standard. Only the extended
dimensions of the shielding interface are shown.

EMC gasket:
Dimensions see Figure 19
Detail „T“
K
Conductive
surface
IEC  2794/11
Figure 20 – Plug-in unit EMC dimensions
9 Subrack and plug in units electrostatic discharge provisions (ESD)
9.1 General
This clause specifies the interface dimensions for an electrostatic discharge contact
implemented in the guide rail and the corresponding conductive strip on the plug-in unit
printed board.
The conductive strips on the printed board are shown for two application requirements: With
permanent connection along with the depth dimension of the board or with interruption before
the board is fully engaged in the connector.
6,1 ± 0,5
60297-3-107  IEC:2012 – 25 –
9.2 Subrack ESD provisions
The ESD contact shall be connected to the subrack horizontal member and spring load fixed
within the determined guide rail area. The ESD contact shall be able to connect the inserted
board on both sides.
S
F
E
IEC  2795/11
Figure 21a – Subrack ESD provision, overview

Detail S
Front, top, horizontal
Subrack member only
Top guide rail only
View „Q“
Q
ESD contact point
at this side only
45,0 –5,0
ESD contact point
E
IEC  2796/11
Figure 21b – Subrack ESD provision, guide rail
Figure 21 – Subrack ESD provision
H7
– 26 – 60297-3-107  IEC:2012
9.3 Plug–in unit ESD provisions, front mounted
Missing dimensions, see Figure 6.

K
> 17,0
J
Generic ESD contact area at this side only

IEC  2797/11
Figure 22 – Plug-in unit ESD provision
Table 1 – Height dimensions
Height units
3 U 4 U
a
H1 ± 0,4 132,55 177,00
H2 ± 0,4 57,15 101,60
37,70 37,70
H3 ± 0,4
H4 ± 0,4 - -
H5 ± 0,4 76,20 151,20
84,00 159,00
H6 ± 0,2
H7 ± 0,4 74,00 149,00
H8 ± 0,2 95,00 170,00
H9 ± 0,2 84,00 159,00
H10 ± 0,1 73,50 148,50
H11 ± 0,2 84,00 159,00
H12 ± 0,2 73,80 148,80
65,00 65,00
H13 ± 0,1
H14   0 / -1,0 95,00 170,00
a
The height dimension H 1 is used as
reference if the subrack design is intended to
fit into the available height of n × U. Smaller
height dimensions may be used as
appropriate for stability or special design
requirements ( H1min = H14 ).
1,30 max.
60297-3-107  IEC:2012 – 27 –
Table 2 – Depth dimensions
185,85
D 1 ± 0,3
D 2 162,00
D 3 156,80
D 4 ≤ 153,50
D 5 ± 0,4 180,85
157,75
D 6 ≤
RD 1 ± 0,3 185,85
10 Nomenclature
Height
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).
H2: Subrack to cabinet or rack mounting hole positions (equal to dimensions Y / Z of
IEC 60297-3-100).
H3: Subrack to cabinet or rack mounting hole positions (equal to dimensions A of
IEC 60297-3-100).
H4: Subrack to cabinet or rack mounting hole positions (equal to dimensions Y / Z of
IEC 60297-3-100).
H5: Subrack vertical aperture opening for plug-in units.
H6: Mounting centre distance for front plug-in units and panels, front and rear.
H7: Printed board guidance height.
H8: Plug-in unit panel height.
H9: Vertical plug-in unit panel mounting centre distance.
H10: Printed board height into subrack guidance height.
H11: Mounting centre distance for backplane.
H12: Front/rear panel body height dimension.
H13: Printed board height into connector guidance height.
H14: Backplane height dimension.
Width
HP: The subrack aperture is theoretically divided into N x horizontal pitches (HP) of 5,08
mm.
The plug-in unit front panel width is divided into N x 5,08 mm horizontal pitches.
Depth
D1: Subrack dimension between front attachment plane and backplane attachment plane.
D2: Dimension between backplane attachment plane and top guide rail unit.
D3: Dimension between backplane attachment plane and bottom guide rail unit.
D4: Dimension PB keep out zone – bottom side, utilizing card edge connector.
D5: Plug-in unit dimension between rear of face plate and utilizing card edge connector.
D6: Dimension PB keep out zone – top side, utilizing card edge connector.
RD1: Subrack dimension between rear attachment plane and rear backplane attachment
plane.
– 28 – 60297-3-107  IEC:2012
Reference plane (given in square boxes)
A: Subrack, first pitch line
B: Subrack, last pitch line
C: Subrack, left inside wall
D: Subrack, right inside wall
E: Subrack, front attachment plane
F: Subrack, backplane attachment plane
F1: Bottom of connector touches F on backplane
G: Guide rail, interface surface to PB
G1: Module PB, interface surface to guide rail
J: Plug-in unit, PB leading edge
J1: Bottoming position of module PB or free board connector within fixed board connector
J2: Bottoming position of module PB within free board connector
J3: Free board connector, leading edge
K: Plug-in unit, rear of face plate
L: Centre line module PB and subrack
L1: Centre line of connector
M: Centre line of module PB thickness
M1: Centre line of connector cavity
M2: Centre line of guide rail
N: Subrack, rear attachment plane
O: Subrack, rear backplane attachment plane

60297-3-107  IEC:2012 – 29 –
Annex A
(informative)
Connector hole pattern at the backplane

M
L
Pin 01
Pin 170 IEC  2798/11
Figure A.1 – Connector pin location according to IEC 61076-4-116, front view

– 30 – 60297-3-107  IEC:2012
Annex B
(informative)
Rear mounted plug-in unit implementation

B.1 Subrack depth dimensions
B.1.1 Subrack type 1
Back-
plane
L
N
E
D1 RD1
F = O
IEC  2799/11
Figure B.1 – Depth dimension subrack type 1, side view
B.1.2 Subrack type 2
O
F
Back-
plane
L
D1
RD1
E N
Backplane thickness
IEC  2800/11
Figure B.2 – Depth dimension subrack type 2, side view

60297-3-107  IEC:2012 – 31 –
B.1.3 Subrack type 3
O
F
Distance between
datum “O“ and datum “F” ±0,2
Distance between
Backplane 1 and backplane 2
Backplane 1 Backplane 2
L
D1
RD1
E N
Thickness backplane 1
Thickness backplane 2
IEC  2801/11
Figure B.3 – Depth dimension subrack type 3, side view

– 32 – 60297-3-107  IEC:2012
Annex C
(informative)
Hot swap latch function
For detailed information, see PICMG-AMC.0 and PICMG-MTCA.0.

60297-3-107  IEC:2012 – 33 –
Annex D
(informative)
Subrack latch mechanism interface dimensions
for ruggedized applications
For detailed information, see PICMG-MTCA.1 section 2.5.2.2: Mandatory subrack latch
mechanism.
– 34 – 60297-3-107  IEC:2012
Annex E
(informative)
Subrack ESD contact interface dimensions

For detailed information, see PICMG-MTCA.0, Figure 2-42; view Y.

_____________
– 36 – 60297-3-107  CEI:2012
SOMMAIRE
AVANT-PROPOS . 38
INTRODUCTION . 40
1 Domaine d’application et objet . 41
2 Références normatives . 41
3 Vue d'ensemble de disposition (4U représentés) . 42
4 Dimensions des bacs . 43
4.1 Dimensions des bacs, zone de montage avant . 43
4.2 Dimensions des bacs, vue de derrière, zone de montage des fonds de panier . 46
5 Dimensions des blocs enfichables . 47
6 Connecteur et dimensions de carte imprimée associée . 48
6.1 Connecteur conforme à la spécification PICMG-MicroTCA.0/CEI 61076-4-116,
connecteur pour carte fixe et dimensions de carte imprimée associée . 48
6.1.1 Connecteur PICMG- MicroTCA.0/CEI 61076-4-116, vue isométrique . 48
6.1.2 Connecteur conforme à la spécification PICMG-MicroTCA.0/
CEI 61076-4-116, connecteur pour carte fixe et carte imprimée
associée – vue d'ensemble de disposition . 48
6.1.3 Dimensions de carte imprimée . 49
6.1.4 Dimensions de carte imprimée, exemple 4U . 50
6.1.5 Connecteur conforme à la spécification PICMG-MTCA.0, dimensions
de connecteur pour carte fixe . 51
6.2 Connecteur en deux parties conforme à la CEI 61076-4-116 et dimensions
de carte imprimée associée . 52
6.2.1 Connecteur en deux parties, vue isométrique . 52
6.2.2 Connecteur en deux parties, vue d'ensemble de disposition . 53
6.2.3 Connecteur en deux parties, dimensions de carte imprimée . 53
6.2.4 Connecteur en deux parties, dimensions de connecteur pour carte fixe . 54
6.3 Connecteur en deux parties avec fixations latérales pour composant sur
carte imprimée PIU . 54
6.3.1 Connecteur en deux parties, vue d'ensemble de disposition . 54
6.3.2 Connecteur en deux parties, dimensions de carte imprimée, 2 U . 54
6.3.3 Connecteur en deux parties, connecteur installé dans un fond de
panier, 2 U . 55
7 Dimensions des fonds de panier .
...