VITA
PO Box 19658, Fountain Hills, AZ 85269
PH: 480-837-7486
Email: info@vita.com
URL: http://www.vita.com
Approved American National Standard
ANSI/VITA 48.2
Mechanical Specifications for Microcomputers Using REDI
Conduction Cooling Applied to VITA VPX
Abstract
To define the mechanical requirements that are needed to ensure the mechanical
interchangeability of conduction cooled 3U and 6U plug-in units and defines the
features required to achieve 2 Level Maintenance compatibility.
Approved July 2010
American National Standards Institute, Inc.
American
National
Standard
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Published by
VMEbus International Trade Association (VITA)
PO Box 19658, Fountain Hills, AZ 85269
Copyright © 2010 by VMEbus International Trade Association
All rights reserved.
Permission of the publisher is required to reproduce this document or any part of it.
Printed in the United States of America - R1.0
ISBN 1-885731-60-4
ANSI/VITA 48.2-2010
Page 3 of 53
Working Group
During the development of this standard working group membership included:
Name
Organization
Status
1
Randy Banton
Mercury Computer Systems
Sponsor
2
Stewart Dewar
Curtiss-Wright Controls Embedded
Computing
Sponsor
3
Jim Robles
The Boeing Company
Sponsor
4
Michael Benjamin
Parker Hannifin Corporation
Sponsor
5
Rex Harvey
Parker Hannifin Corporation
Sponsor
6
Richard Hodges
Parker Hannifin Corporation
Sponsor
7
Dan Golden
The Boeing Company
Sponsor
8
Ivan Straznicky
Curtiss-Wright Controls Embedded
Computing
Sponsor
9
Steve Belvin
ISBi
Participant
10
Adam Bloch
EATON Aerospace
Participant
11
Gorky Chin
Curtiss-Wright Controls Embedded
Computing
Participant
12
David Compston
Radstone
Participant
13
Gerard Drewek
General Dynamics
Participant
14
Doug DuBois
L-3 Communications
Participant
15
Chris Eckert
SBS technologies, Inc.
Participant
16
Mark Heslep
MITRE Corporation
Participant
17
Itzhak Hirshtal
Elta Electronic Industries
Participant
18
Frank Hom
APW Electronic Solutions
Participant
19
Andreas Lenkisch
Schroff GmbH
Participant
20
Charles Linquist
Dawn VME Products, Inc.
Participant
21
David McCallum
Molex
Participant
22
Bob Patterson
Tyco Electronics
Participant
23
Andrew Reddig
TEK Microsystems
Participant
24
John Rynearson
VITA
Participant
25
Bob Sullivan
Hybricon Corporation
Participant
26
Bruce Thomas
Curtiss-Wright Controls Embedded
Computing
Participant
27
Michael Thompson
Pentair Electronic Packaging
Participant
28
Mike Biemer
Northrop Grumman Corporation
Participant
29
Scott Goedeke
Northrop Grumman Corporation
Participant
30
Ken Boyette
Critia Computer, Inc.
Observer
31
Michael Munroe
Bustronics
Observer
32
Elwood Parsons
Standard Consultant
Observer
33
Mac Rush
Motorola Computer Group
Observer
ANSI/VITA 48.2-2010
Page 4 of 53
Comments, Corrections, and/or Additions
Anyone wishing to provide comments, corrections and/or additions to this standard please direct them
to the VITA Technical Director:
John Rynearson, Technical Director
VITA
PO Box 19658
Fountain Hills, AZ 85269
Ph: 480 837 7486
Email: techdir@vita.com
VSO and Other Standards
Should anyone want information on other standards being developed by VSO, VME Product
Directories, VME Handbooks, or general information on the VME market, please contact the VITA
office at the address or telephone number given on the front cover.
ANSI/VITA 48.2-2010
Page 5 of 53
Table of Contents
1 Scope....................................................................................................................................................7
2 Purpose ................................................................................................................................................7
3 Intellectual Property ............................................................................................................................7
4 References ...........................................................................................................................................7
4.1 Terminology ...............................................................................................................................8
4.1.1 Abbreviations ......................................................................................................................8
4.1.2 2 Level Maintenance (2LM) ................................................................................................9
4.1.3 Frame vs. Cover .................................................................................................................9
4.1.4 Special word usage.............................................................................................................9
5 Circuit Board......................................................................................................................................11
5.1 Circuit Board Sizes...................................................................................................................11
5.2 Conductive Elements and Plug-in Unit Frame .........................................................................11
5.3 Circuit Board Commonality ......................................................................................................11
6 Plug-in Unit ........................................................................................................................................13
6.1 Optional connector protection ..................................................................................................17
6.2 Plug-in Unit...............................................................................................................................18
6.3 Plug-in unit height ....................................................................................................................19
6.4 Plug-in unit depth .....................................................................................................................19
6.5 Plug-in unit thickness and plug-in unit frame, cover and PCB relationship..............................24
6.6 Retainer location ......................................................................................................................27
6.7 Additional retainer considerations ............................................................................................27
6.8 Keying and guide pin/socket ....................................................................................................28
6.9 Primary side cover ...................................................................................................................29
6.10 Secondary side cover ...........................................................................................................29
6.11 Plug-in unit insertion/extraction features ..............................................................................29
7 Guidance on cooling .........................................................................................................................37
8 Position of plug-in unit mounted connectors and backplane mounted connectors ..................38
8.1 Position of connectors on the plug-in units ..............................................................................38
8.2 Position of backplane mounted connectors .............................................................................38
8.3 Backplane Rigidity....................................................................................................................38
8.4 Dimensions ..............................................................................................................................39
9 Sub-rack .............................................................................................................................................48
10 Filler panels/slot blockers ..............................................................................................................52
11 EMC...................................................................................................................................................52
12 Two Level Maintenance (2LM) considerations .............................................................................52
Table of Figures
Figure 1. 3U and 6U board size..............................................................................................................12
Figure 2. Representative configurations of 3U conduction cooled plug-in units, primary side retainers.15
Figure 3. Representative configurations of 6U conduction cooled plug-in units on 1.00 in. centers,
primary side retainers. ............................................................................................................................16
Figure 4. Example of connector protection applied to a 6U plug-in unit. ................................................17
Figure 5. Comparison of 6U plug-in units, without and with connector protection..................................18
Figure 6. Envelope dimensions for a Type 1, 3U plug-in unites – primary side retainers. .....................20
Figure 7. Envelope dimensions for a Type 1, 6U plug-in units- primary side retainers. .........................21
Figure 8. Envelope dimensions for a Type 1, 3U plug-in units – secondary side retainers....................22
Figure 9. Envelope dimensions for a Type 1, 6U plug-in units – secondary side retainers....................23
Figure 10. Dimensions shown are applicable to both 3U and 6U form factor plug-in units. ...................26
Figure 11. Plug-in unit insertion process and features in the extraction/insertion lever .........................31
Figure 12. Plug-in extraction process and features in the extraction/insertion lever and sub-rack. .......32
Figure 13. View of sub-rack showing features for insertion and extraction. ...........................................33
Figure 14. 6U sub-rack features required for insertion. ..........................................................................34
Figure 15. 3U sub-rack features required for insertion. ..........................................................................35
Figure 16. 6U features for alternate insertion/extraction Lever. ............................................................36