IEEE Std 1101.11-1998
IEEE Std 1101.11-1998
IEEE Standard for Mechanical Rear
Plug-in Units SpeciÞcations for
Microcomputers Using IEEE 1101.1
and IEEE 1101.10 Equipment Practice
IEEE Computer Society
Sponsored by the
Bus Architecture Standards Committee
30 June 1998
SH94609
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ISBN 0-7381-0179-6
IEEE Std 1101.11-1998
IEEE Standard for Mechanical Rear
Plug-in Units SpeciÞcations for
Microcomputers Using IEEE 1101.1
and IEEE 1101.10 Equipment Practice
Sponsor
Bus Architecture Standards Committee
of the
IEEE Computer Society
Approved 21 May 1998
IEEE-SA Standards Board
Abstract: Additional dimensions that will ensure mechanical interchangeability of subracks and
plug-in units based on IEEE P1101.1 (D1.0, 1997), IEEE Std 1101.10-1996, and the environmental
requirements of IEC 61587-1 (May 1998-Draft) and IEC 61587-3 (May 1998-Draft) are specified.
Keywords: backplane, compatibility, connector, inline configuration, inspection dimension, plug-in
unit, printed board, shroud, subrack
The Institute of Electrical and Electronics Engineers, Inc.
345 East 47th Street, New York, NY 10017-2394, USA
Copyright © 1998 by the Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 1998. Printed in the United States of America.
ISBN 0-7381-0179-6
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Introduction
(This introduction is not part of IEEE Std 1101.11-1998, IEEE Standard for Mechanical Rear Plug-in Units SpeciÞcations for Microcomputers Using IEEE 1101.1 and IEEE 1101.10 Equipment Practice.)
Despite the push for metriÞcation, the ÒEuroboardÓ (19 in based) continues to be the leading choice for the
industrial mechanical equipment practice, and is accepted throughout the world for all kinds of electronics
applications. Among these are all major bus architectures, such as VME, CompactPCI¨, etc.
This is why the Computer SocietyÕs Technical Committee on Microcomputers and Microprocessors found it
appropriate to create an IEEE standard which further expands upon IEEE P1101.1 (D1.0, 1997) and the IEC
60297-... series of standards, ÒDimensions of Mechanical Structures of the 482.6 mm (19 in) Series,Ó [IEC
60297-3 (1984-01) and IEC 60297-4 (1995-03)] for rear plug-in units.
This standard is an extension of IEEE P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996 (submitted to the
IEC) and deÞnes the mechanical rear plug-in unit sizes and interface details.
At the time this standard was completed, the P1101.11 Working Group had the following membership:
Eike Waltz, Chair
Frank Hom, Secretary
Ralf Behrens
Paul Denomme
Robert W. Downing
Jean-Jacque Dumont
Wayne P. Fischer
Tad Kubic
Paul Mazura
David Moore
Peter G. Odell
Gunter Pape
Elwood T. Parsons
Holly SherÞnski
Michael G. Thompson
Sue Wong
David L. Wright
The following persons were on the balloting committee:
Ghassan A. Abbas
Malcolm J. Airst
Ray S. Alderman
Harry A. Andreas
Keith D. Anthony
Edmund H. Baulsir
Martin Blake
Ralf Bokaemper
David Brearley
Charles Brill
C. H. Chen
Copyright © 1998 IEEE. All rights reserved.
Robert W. Downing
Jean-Jacque Dumont
Wayne P. Fischer
Kenneth C. Heck
Roger Hinsdale
Frank Hom
Conrad A. Laurvick
Gerald E. Laws
Rollins Linser
Gary S. Manchester
Joseph R. Marshall
Thanos Mentzelopoulos
Gene E. Milligan
Klaus-Dieter Mueller
Michael Munroe
Joe P. Norris
Peter G. Odell
Elwood T. Parsons
Hermann H. Strass
Michael G. Thompson
Robert C. Tripi
Bruce Wallace
David L. Wright
iii
The Þnal conditions for approval of this standard were met on 21 May 1998. This standard was conditionally
approved by the IEEE-SA Standards Board on 19 March 1998, with the following membership:
Richard J. Holleman, Chair
Satish K. Aggarwal
Clyde R. Camp
James T. Carlo
Gary R. Engmann
Harold E. Epstein
Jay Forster*
Thomas F. Garrity
Ruben D. Garzon
Donald N. Heirman, Vice Chair
Judith Gorman, Secretary
L. Bruce McClung
Louis-Fran•ois Pau
Ronald C. Petersen
Gerald H. Peterson
John B. Posey
Gary S. Robinson
Hans E. Weinrich
Donald W. Zipse
James H. Gurney
Jim D. Isaak
Lowell G. Johnson
Robert Kennelly
E. G. ÒAlÓ Kiener
Joseph L. KoepÞnger*
Stephen R. Lambert
Jim Logothetis
Donald C. Loughry
*Member Emeritus
Catherine K.N. Berger
IEEE Standards Project Editor
CompactPCI is a registered trademark of the PCI Industrial Computer Manufacturers Group.
iv
Copyright © 1998 IEEE. All rights reserved.
Contents
1.
Overview.............................................................................................................................................. 1
1.1 Scope............................................................................................................................................ 1
1.2 Purpose......................................................................................................................................... 2
2.
References............................................................................................................................................ 2
3.
Terminology......................................................................................................................................... 3
3.1 Abbreviations............................................................................................................................... 3
3.2 Special word usage ...................................................................................................................... 3
4.
General arrangement............................................................................................................................ 4
5.
Relationships of front and rear plug-in units ....................................................................................... 5
5.1 The in-line configuration, non-EMC and EMC........................................................................... 5
6.
Rear mounted plug-in unit printed board (Euroboard) sizes ............................................................... 6
6.1 Board height................................................................................................................................. 7
6.2 Board depth.................................................................................................................................. 7
6.3 Rear mounted plug-in unit inspection dimensions....................................................................... 7
7.
Connector orientation, pin labeling, and printed board component view............................................ 9
8.
Subrack rear attachment plane ........................................................................................................... 10
9.
Rear backplane mounted plug-in unit fixed connector relationship .................................................. 11
10.
Rear subrack connector (backplane mounted) shroud orientation..................................................... 12
10.1 Connector shroud orientation..................................................................................................... 12
11.
Backplane bow and support ............................................................................................................... 12
12.
Connector performance...................................................................................................................... 13
13.
Connector alignment.......................................................................................................................... 13
14.
Rear mounted plug-in unit cooling consideration.............................................................................. 13
15.
Front and rear plug-in unit front panel protective ground ................................................................. 13
15.1 Mechanical design ..................................................................................................................... 13
15.2 Requirement............................................................................................................................... 13
15.3 Resistance .................................................................................................................................. 13
15.4 Minimum galvanic compatibility and contact operations.......................................................... 14
15.5 Pass criteria ................................................................................................................................ 14
Annex A (normative) Inspection Dimensions for Subracks and Associated Plug-in Units in
Accordance with IEEE 1101.1, IEEE 1101.10 and IEEE Draft P1101.11 Using the
IEC 61076-4-101 Connector Series ............................................................................................. 15
Annex B (informative) Bibliography .......................................................................................................... 21
Copyright © 1998 IEEE. All rights reserved.
v
IEEE Standard for Mechanical Rear
Plug-in Units SpeciÞcations for
Microcomputers Using IEEE 1101.1
and IEEE 1101.10 Equipment Practice
1. Overview
1.1 Scope
This standard may be applied in all Þelds of electronics where equipment and installations are required to
conform to the 482.6 mm (19 in) equipment practice [based on IEEE P1101.1 (D1.0, 1997),1 IEEE Std
1101.10-1996, IEC 60297-3 (1984-01) [B4]2, and IEC 60297-4 (1995-03) [B5]] for mounting in equipment
according to ANSI/EIA 310-D-1992 [B1] and IEC 60297-1 (1986-01) [B3] (see Figure 1). This standard
covers subracks equipped with front mounted plug-in units in accordance with IEEE P1101.1 (D1.0, 1997)
and IEEE Std 1101.10-1996, and provides for additional rear mounted plug-in units in the same subrack.
This standard permits other suitable IEC connector-related dimensions to be added (see Annex A).
1.1.1 Dimensions of printed boards
This standard covers an additional range of printed board (PB) sizes suitable for subrack rear mounted plugin units [based on IEEE P1101.1 (D1.0, 1997), IEEE Std 1101.10-1996, IEC 60297-3 (1984-01) [B4], and
IEC 60297-4 (1995-03) [B5]] for mounting in equipment according to ANSI/EIA 310-D-1992 [B1] and IEC
60297-1 (1986-09) [B3].
1.1.2 Dimensions of subracks
This standard covers additional dimensions, according to IEEE P1101.1 (D1.0, 1997) and IEEE Std
1101.10-1996, for subracks with rear mounted plug-in units.
1.1.3 Dimensions of backplanes
This standard covers limits of backplane thickness, according to IEEE P1101.1 (D1.0, 1997) and IEEE Std
1101.10-1996, when installed in subracks with rear mounted plug-in units.
1Information
2The
on references can be found in Clause 2.
numbers in brackets preceded by the letter B correspond to those of the bibliography in Annex B.
Copyright © 1998 IEEE. All rights reserved.
1
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
1.1.4 Choice of connectors
This standard refers only to connectors in accordance with IEC 60603-2 (1995-09) [B6] and as referenced in
IEEE P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996. Other IEC connectors may be used by themselves
or mixed with IEC 60603-2 connectors. This standard deÞnes inspection dimensions required for IEC
60603-2 and IEC 61076-4-1xx connectors. Inspection dimensions for the IEC 61076-4-101 series of connectors may be found in Annex A. This standard also deÞnes the difference between a front plug-in unit connector and a rear plug-in unit connector (see Figure 6).
1.1.5 Rear connector shrouds
This standard deÞnes the dimensions of compatible connector shrouds.
1.1.6 Front and rear plug-in unit front panel protective ground
This standard deÞnes mechanical interface and electrical test requirements for input/output (I/O) plug-in unit
protective ground protection with reference to IEC 60950 (1991-10) [B8].
1.2 Purpose
The purpose of this standard is to specify additional dimensions that, when followed, will ensure mechanical
interchangeability of subracks and plug-in units based on IEEE Std 1101.10-1996 and the environmental
requirements of IEC 61587-1 (May 1998-Draft) and IEC 61587-3 (May 1998-Draft).
NOTEÑIEEE P1101.1 (D1.0, 1997), IEC 60297-3 (1984-01), and IEC 60297-4 (1995-03) subrack systems not complying with these additional standard requirements have limited compatibility.
2. References
This standard shall be used in conjunction with the following publications. When they are superseded by an
approved revision, the revision shall apply.
The users of this standard are required to be familiar with IEEE P1101.1 (D1.0, 1997) and IEEE Std
1101.10-1996.
IEC 61587-1 (May 1998-Draft), Climatic, mechanical tests and safety aspects for racks, subracks for the
IEC 60917-...and IEC 60297-... Series.3
IEC 61587-3 (May 1998-Draft), Electromagnetic shielding performance tests for cabinets, racks and subracks for the IEC 60917-... and 60297-...Series.
IEEE P1101.1 (D1.0, 1997), DRAFT Standard for Mechanical Core SpeciÞcation for Microcomputers
Using IEC (60)603.2 Connectors.4
IEEE Std 1101.10-1996, IEEE Standard for Additional Mechanical SpeciÞcations for Microcomputers
Using the IEEE 1101.1-1991 Equipment Practice.5
3IEC
publications are available from IEC Sales Department, Case Postale 131, 3, rue de VarembŽ, CH-1211, Gen•ve 20, Switzerland/
Suisse. IEC publications are also available in the United States from the Sales Department, American National Standards Institute, 11
West 42nd Street, 13th Floor, New York, NY 10036, USA.
4This IEEE standards project was not approved by the IEEE Standards Board at the time this publication went to press. For information
about obtaining a draft, contact the IEEE.
5IEEE publications are available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway,
NJ 08855-1331, USA.
2
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
3. Terminology
3.1 Abbreviations and acronyms
Da
Db
Dc
Dg
DT 2
EMC
FSC
HP
I/O
PB
PFC
PiU
RDc
RDx
RFC
RSC
U
dimension between front panel mounting hole and connector mounting hole
printed board depth dimension
inspection dimension for subrack front mounted PiUs
dimension between front panel mounting hole and rear end solder side cover mounting holes
inspection dimension of plug-in unit assembly
electromagnetic compatibility
Þxed subrack connector
horizontal pitch of 5.08 mm
input/output
printed board
plug-in unit free connector
plug-in unit
inspection dimension for subrack rear mounted PiUs
inspection dimension for shroud positioning
rear free connector
rear subrack connector (backplane mounted)
subrack height measured in units of 44.45 mm (1.75 in)
3.2 Special word usage
may: A keyword indicating ßexibility of choice with no implied preference.
shall: A keyword indicating a mandatory requirement.
should: A keyword indicating ßexibility of choice with a strongly preferred implementation.
complementary: A keyword indicating that there is no standard as yet deÞned; however, the product is in
design or is available. Although the product relates to the referred standard, it may differ or expand mechanically and/or electrically in certain areas of the standard.
Copyright © 1998 IEEE. All rights reserved.
3
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
4. General arrangement
Generally, subracks featuring rear plug-in units are also equipped with front plug-in units and/or Þller panels
in accordance with IEEE P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996. The front and rear plug-in unit
PBs are Òin-line,Ó meaning that there is no offset between the front and rear PBs. (The component side 1 of
the front and rear PB are in the same mechanical plane).
NOTES
1ÑThe drawings in this standard are not intended to indicate design.
2ÑAll dimensions are given in millimeters.
3ÑAll drawings in this standard are shown in Þrst angle projection according to ISO 1101-1983 [B12].
4ÑDimensions appearing in parentheses ( ) are for reference only, and are deÞned in the stated documents.
5ÑTerminology follows IEC 60050 [B2] and IEC 60916 (1988-07) [B7].
Component side 1
Rear mounted plug-in units
EMC or non-EMC
Component side 1
Handle
Handle
Front mounted plug-in units
EMC or non-EMC
Figure 1ÑGeneral arrangement
4
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
5. Relationships of front and rear plug-in units
There are two possible ways to mount rear plug-in units into a subrack while providing for front and additional rear plug-in units. They are as follows:
a)
b)
The in-line conÞguration, which is preferred (see Figure 2).
The offset conÞguration, which is not detailed in this standard (see Figure 2).
This standard will only focus on the dimensional interchangeability of the in-line conÞguration.
Figure 2ÑThe in-line versus the offset conÞguration
5.1 The in-line conÞguration, non-EMC and EMC
The in-line conÞguration (see Figure 3) allows the front plug-in unit and the rear plug-in unit to be mechanically coplanar. It also allows the subrackÕs front plug-in units and front Þller panels, as standardized in IEEE
P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996, to be mechanically mounted on the rear of the subrack
(not necessarily electrically). At the same time, this conÞguration permits 3 row IEC 60603-2 C-type connectors to be mixed with 5 row IEC 61076-4-1xx connectors.
Copyright © 1998 IEEE. All rights reserved.
5
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
Figure 3ÑIn-line front and rear non-EMC and EMC plug-in units
6. Rear mounted plug-in unit printed board (Euroboard) sizes
IEEE 1101.1 board depths are (100) mm, (160) mm, (220) mm, (280) mm, (340) mm, and (400) mm increments of 60 mm. For rear mounted plug-in units greater than 160 mm, the same depth increments apply (not
shown in Figure 4). For depths less than 160 mm, the increment is 20 mm (see Table 1).
Table 1ÑRear mounted plug-in unit board depth (see Figure 4)
(Db +0/Ð0.3)
(Da ± 0.1)
60
80
(100)
120
140
(160)
53.67
73.67
(93.67)
113.67
133.67
(153.67)
NOTEÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
6
Copyright © 1998 IEEE. All rights reserved.
IEEE
Std 1101.11-1998
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
Figure 4ÑRear mounted plug-in unit board matrix
6.1 Board height
For rear mounted plug-in unit PB heights, see Figure 4 and IEEE P1101.1 (D1.0, 1997).
6.2 Board depth
For additional board depth, see Figure 4 and IEEE P1101.1 (D1.0, 1997).
NOTEÑAll sizes as per IEEE P1101.1 (D1.0, 1997) are permitted.
6.3 Rear mounted plug-in unit inspection dimensions
The rear mounted plug-in unit inspection dimensions are deÞned in Table 2.
Table 2ÑRear mounted plug-in unit inspection dimensions (see Figure 5)
(Db)
60
80
(100)
120
140
(160)
(DT 2 ±0.4)
Type R 3row
IEC 60603-2
69.88
89.88
109.88
129.88
149.88
169.88
(DT 2 ±0.4)
Type R 5row
IEC 61076-4-1xx
72.38
92.38
112.38
132.38
152.38
172.38
NOTEÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
Copyright © 1998 IEEE. All rights reserved.
7
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
Inspection
dimension
(DT 2)
PB
Rear panel
Connector
Center line
(Db)
Fig. 5 Rear Mounted Plug-In Unit
Inspection Dimension Demension
Figure 5ÑRear mounted plug-in unit inspection dimension
8
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
7. Connector orientation, pin labeling, and printed board component view
Connectors are generally deÞned as Òfree connectorsÓ (mounted to a plug-in unit) or as ÒÞxed connectorsÓ
(mounted to a subrack via a backplane or direct to the rear of the subrack). Figure 6 illustrates the difference
between a front plug-in unit connector and a rear plug-in unit connector. All front plug-in unit free connectors are abbreviated as PFC, all rear plug-in unit free connectors are abbreviated as RFC. The subrack Þxed
connector interfacing to the front plug-in unit, or Þxed subrack connector, is referred to as FSC. The rear
subrack (backplane mounted) connector (rear FSC connector tails are converted to a rear connector by using
a shroud) is referred to as RSC.
d
c b
a z
(See Note)
PB edge
1
2
3
Backplane
PB edge
Spacer Connector tails
Shroud
RFC
FSC
PB edge
RSC
Rear PB
PFC
Front PB
PB edge
NOTEÑThe pin numbering on the connector may show a permanent, molded-in Ò30Ó, Ò31Ó, and Ò32Ó in
place of Ò1Ó, Ò2Ó, and Ò3Ó.
Figure 6ÑConnector orientation, pin labeling, and PB component view
Copyright © 1998 IEEE. All rights reserved.
9
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
8. Subrack rear attachment plane
The rear attachment plane is based on the IEC 60603-2 C-type connector and IEC 61076-4-1xx connector
with 17 mm tails. The part of the tail that is used as the rear Þxed connector contact pin shall comply with
the performance level of the front Þxed connector. The user will rely on the RDx inspection dimension to
guarantee interchangeability with the appropriate plug-in unit.
The designer will utilize the RDc inspection dimension when choosing or designing connectors in compliance with this standard [based on IEC 60603-2 connectors. See IEEE P1101.1 (D1.0, 1997)]. Other connectors may require a different RDc inspection dimension (see Table 3).
Table 3ÑRear mounted plug-in unit subrack inspection dimensions (see Figure 7)
(Db)
60
80
(100)
120
140
(160)
RDc +0.5 Ð0
82.48
102.48
122.48
142.48
162.48
182.48
RDx ³
Type R 3row
IEC 60603-2
70.30
90.30
110.30
130.30
150.30
170.30
RDx ³
Type R 5row
IEC 61706-4-1xx
72.80
92.80
112.80
132.80
152.80
172.80
NOTEÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
Figure 7ÑSubrack attachment planes and inspection dimensions
for a 17 mm tail connector
10
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
9. Rear backplane mounted plug-in unit Þxed connector relationship
The purpose of the connector shroud is to convert the tails that protrude out of the back of a subrack (via the
backplane) into connector pins (a connector) in accordance to IEC 60603-2 (1995-09) [B6] and IEC 610764-1xx (1998-Draft) [B10] (see Figure 8).
The shroud spacer and the shroud bottom thickness (which may or may not include the spacer) are either
deÞned by application, or agreed upon between manufacturer and user.
See Clause 8
of this standard
Figure 8ÑRear backplane mounted connector shroud on 17 mm tails
Copyright © 1998 IEEE. All rights reserved.
11
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
10. Rear subrack connector (backplane mounted) shroud orientation
10.1 Connector shroud orientation
Connectors according to IEC 60603-2 (1995-09) [B6] and IEC 61076-4-1xx (1998-Draft) [B10] have a permanent, molded-in mating orientation (see Figure 9). This molded-in mating orientation deÞnes the RSC
shroud position.
¥
Rear view of backplane
Figure 9ÑRSC shroud orientation
11. Backplane bow and support
The number and type of connector contact pins used per plug-in unit will deÞne the amount of force exerted
on the backplane. If the backplane thickness cannot absorb the connector force, then the backplane must be
stiffened. The type of stiffener used is dependent on both the positioning and the number of connectors
required on the backplane (available space).
NOTEÑThe insertion/extraction deßection/bow of the backplane permitted is to be calculated within the min./max.
inspection dimensions of the subrack [see IEEE P1101.1 (D1.0, 1997)].
12
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
12. Connector performance
Connectors to IEC 60603-2 (1995-09) [B6] and IEC 61076-4-1xx (1998-Draft) [B10] are designed for different performance classes. The rear backplane connector shroud (connector converted by use of shroud and
extended pins from the front connector) must meet the mating area requirements (performance class) of the
front mounted connector. Since the use of electronics is permitted on the rear mounted plug-in units, the system designer is cautioned when powering these rear mounted plug-in units. If the rear mounted plug-in unit
uses the same pin for power as the front mounted plug-in unit, the total current is the sum of the front
mounted plug-in unit and the rear mounted plug-in unit.
13. Connector alignment
Space permitting additional connectors without contact pins may be used on a rear mounted plug-in unit to
ensure alignment with the connectors.
14. Rear mounted plug-in unit cooling consideration
When rear mounted plug-in units are installed the power dissipation needs to be considered. The construction of the subrack should permit airßow management.
15. Front and rear plug-in unit front panel protective ground
(See Figures 10 and 11)
15.1 Mechanical design
The plug-in unit front panel protective ground pin shall be based on the alignment pin as described in IEEE
Std 1101.10-1996 Clause 6. Pin and receptacle shall be in mated condition.
15.2 Requirement
There are two requirements of this standard for plug-in unit front panel protective ground [IEC 60950 (199110) [B8] and IEC 61140 (1997-11) [B11]]. They are as follows:
a)
b)
Short term current/resistance (200 A at 100 mW for 5 ms);
Continuous current/resistance (25 A at 100 mW continuous).
15.3 Resistance
The maximum resistance between the front panel of the plug-in unit and earth ground is 100 mW, and is
divided into three parts. They are as follows:
a)
b)
c)
40 mW maximum between the plug-in unit front panel (alignment/protective ground pin) and the
subrack (alignment/protective ground pin receptacle);
40 mW maximum between the subrack (alignment/protective ground pin receptacle) and the subrack
frame ground;
20 mW maximum between the subrack frame ground and the earth ground.
Copyright © 1998 IEEE. All rights reserved.
13
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
15.4 Minimum galvanic compatibility and contact operations
Minimum galvanic compatibility between the alignment/protective ground pin and the protector ground
receptacle is nickel-to-nickel, meaning both parts are nickel plated at a minimum. The minimum mechanical
endurance is 200 contact operations.
15.5 Pass criteria
After testing, the assembly tested must be reusable.
Figure 10ÑSubrack protective ground receptacle zone
Figure 11ÑSubrack front and rear protective ground receptacle position
(subrack front view shown)
14
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
Annex A
(normative)
Inspection Dimensions for Subracks and Associated Plug-in
Units in Accordance with IEEE 1101.1, IEEE 1101.10 and IEEE
Draft P1101.11 Using the IEC 61076-4-101 Connector Series
A.1 General overview
A.1.1 Annex scope
This annex may be applied in all Þelds of electronics where equipment and installations are required to conform to the 482.6 mm (19 in) equipment practice based on IEEE P1101.1 (D1.0, 1997), IEEE Std 1101.101996, IEC 60297-3 (1984-01), and IEC 60297-4 (1995-03). This annex covers subracks equipped with front
plug-in units in accordance with IEEE P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996, and provides for
additional rear mounted plug-in units in the same subrack.
A.1.1.1 Choice of connectors
This annex refers only to connectors in accordance with IEC 61076-4-101 (1995-05) [B9], with references
to IEEE P1101.1 (D1.0, 1997) and IEEE Std 1101.10-1996. Other suitable connectors may be mixed with
IEC 61076-4-101 connectors on the same backplane. This annex deÞnes only the inspection dimensions
required for IEC 61076-4-101 compatible connectors.
A.1.1.2 Rear connector shrouds
This annex deÞnes the positioning and interface dimensions of compatible connector shrouds.
A.1.2 Annex purpose
The purpose of this annex is to specify dimensions that will ensure mechanical interchangeability of subracks and plug-in units based on IEEE P1101.1 (D1.0, 1997), IEEE Std 1101.10-1996, IEEE 1101.11-1998,
IEC 60297-3 (1984-01), and IEC 60297-4 (1995-03), using IEC 61076-4-101 based connectors as well as
IEC 61587-1 (May 1998-Draft) and IEC 61587-3 (May 1998-Draft) environmental requirements.
A.1.3 Subrack front and rear mounted plug-in units
This annex speciÞes additional features required to mount front and rear mounted plug-in units in subracks
[based on IEC 60297-3 (1984-01) [B4], IEC 60297-4 (1995-03) [B5], IEEE P1101.1 (D1.0, 1997), and
IEEE Std 1101.10-1996] that are based on the connector dependent dimensions of the IEC 61076-4-101
connector series.
Applications may route user-deÞned input/output (I/O) through the subrack Þxed connectors (16 mm tail
backplane mounted connectors) out of the rear of the subrack via rear mounted plug-in units.
The typically front mounted plug-in unit printed board (PB) sizes (in increments of 60 mm), as deÞned in
IEC 60297-3 (1984-01) [B4], IEC 60297-4 (1995-03) [B5], and IEEE P1101.1 (D1.0, 1997), have been
expanded upon in order to make them suitable for rear mounted plug-in unit applications (in increments of
20 mm). See Clause 6 of this standard.
Copyright © 1998 IEEE. All rights reserved.
15
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
Figure A.1ÑArrangement for subrack front/rear mounted plug-in units
A.1.4 Front mounted plug-in unit inspection dimensions based on IEC 61076-4-101
connectors (2 mm)
The front mounted plug-in unit inspection dimensions are deÞned in Table A.1.
Table A.1ÑFront mounted plug-in unit inspection dimensions (see Figure A.2)
(Db)
DT 2 ±0.4
Dg ± 0.1
100
160
220
280
340
400
111.74
171.74
231.74
291.74
351.74
411.74
76.5
136.5
196.5
256.5
316.5
376.5
NOTES
1ÑThe Dg dimension is used for mounting the solder side cover.
2ÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
16
Copyright © 1998 IEEE. All rights reserved.
IEEE
Std 1101.11-1998
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
Figure A.2ÑFront mounted plug-in unit inspection dimensions
for IEC 61076-4-101 connectors
A.1.5 Rear mounted plug-in unit inspection dimensions based on IEC 61076-4-101
connectors (2 mm)
The rear mounted plug-in unit inspection dimensions are deÞned in Table A.2.
Table A.2ÑRear mounted plug-in unit inspection dimensions (see Figure A.3)
(Db)
60
80
(100)
120
140
(160)
DT 2 ±0.4
71.74
91.74
111.74
131.74
151.74
171.74
Dg ± 0.1
36.5
56.5
76.5
96.5
116.5
136.5
NOTES
1ÑThe Dg dimension is used for mounting the solder side cover.
2ÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
Copyright © 1998 IEEE. All rights reserved.
17
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
Figure A.3ÑRear mounted plug-in inspection dimensions
for IEC 61076-4-101 connectors
A.1.6 Subrack rear attachment plane
The rear attachment plane is based on the IEC 60603-2 connector with 17 mm tails and the IEC 61076-4101 connector with 16 mm tails. The part of the tail that is used as the rear Þxed connector contact pin shall
comply with the performance level of the front Þxed connector. The RDx inspection dimension enables the
user to inspect interchangeability with the appropriate plug-in unit.
The RDc inspection dimension is important for the designer of the subrack and backplane (see Table A.3).
Table A.3ÑRear mounted plug-in unit subrack inspection dimensions (see Figure A.4)
(Db)
60
80
(100)
120
140
(160)
RDc +0.5 Ð0
82.48
102.48
122.48
142.48
162.48
182.48
RDx ³
72.14
92.14
112.14
132.14
152.14
172.14
NOTEÑFor all dimensions in parentheses ( ), see IEEE P1101.1 (D1.0, 1997).
18
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
Figure A.4ÑSubrack attachment planes and inspection dimensions
for IEC 61076-4-101 connectors
A.1.7 Rear backplane mounted plug-in unit Þxed connector relationship
The purpose of the shroud is to convert tails that protrude out of the back of the subrack (via a backplane)
into connector pins (a connector) in accordance to IEC 61076-4-101 (1995-05) [B9] (see Figure A.5).
The shroud spacer and the shroud bottom thickness (which may or may not include the shroud spacer) are to
be agreed upon by between manufacturer and user.
A.1.8 Connector alignment
Space permitting additional connectors without contacts may be used on a rear mounted plug-in unit to
ensure alignment with the connectors. Shrouds with alignment features may also be used.
Copyright © 1998 IEEE. All rights reserved.
19
IEEE
Std 1101.11-1998
IEEE STANDARD FOR MECHANICAL REAR PLUG-IN UNITS SPECIFICATIONS FOR
See Clause A.1.6
of this annex
Detail A
0.65±0.16
0.65±0.16
0.5 R
2.0
Cable
connector latch
21.18±0.16
21.83
Connector shroud
Figure A.5ÑRear backplane mounted connector shroud on 16 mm tails
20
Copyright © 1998 IEEE. All rights reserved.
MICROCOMPUTERS USING IEEE 1101.1 AND IEEE 1101.10 EQUIPMENT PRACTICE
IEEE
Std 1101.11-1998
Annex B
(informative)
Bibliography
[B1] ANSI/EIA 310-D-1992, Racks, Panels, and Associated Equipment.
[B2] IEC 60050 International Electrotechnical Vocabulary.
[B3] IEC 60297-1 (1986-09), Dimensions of mechanical structures of the 482.6 mm (19 in) series. Part 1:
Panels and racks.
[B4] IEC 60297-3 (1984-01), Dimensions of mechanical structures of the 482.6 mm (19 in) series. Part 3:
Subracks and associated plug-in units.
[B5] IEC 60297-4 (1995-03), Dimensions of mechanical structures of the 482.6 mm (19 in) series. Part 4:
Subracks and associated plug-in unitsÑAdditional dimensions.
[B6] IEC 60603-2 (1995-09), Connectors for frequencies below 3 MHz for use with printed boardsÑPart 2:
Detail speciÞcation for two-part connectors with assessed quality, for printed boards, for basic grid of 2.54
mm (0.1 in) with common mounting features.
[B7] IEC 60916 (1988-07), Mechanical structures for electronic equipment: Terminology.
[B8] IEC 60950 (1991-10), Safety of information technology equipment.
[B9] IEC 61076-4-101 (1995-05), Connectors with assessed quality, for use in d.c. low-frequency analogue
and in digital high speed data applicationsÑPart 4: Printed board connectorsÑSection 101: Detail speciÞcation for two-part connector modules having a basic grid of 2.0 mm for printed boards and backplanes in
accordance with IEC 60917.
[B10] IEC 61076-4-1xx, (1998-Draft) Expanded IEC (60)603-2 Type C Connector.
[B11] IEC 61140 (1997-11), Protection against electric shockÑCommon aspects for installation and equipment.
[B12] ISO 1101: 1983, Extract 1: 1983, Technical drawingÑGeometrical tolerancingÑToleranced characteristics and symbolsÑExamples of indication.
Copyright © 1998 IEEE. All rights reserved.
21