IEEE 1101.2:1992 pdf download.IEEE Standard for Mechanical Core Specifications for Conduction-Cooled Eurocards.
IEEE 1101.2 defines the mechanical requirements for Eurocard-hased conduction-cooled circuit card assemblies (CCAs).
1.1 Mechanical Characteristics
The standard defines dimensions and card slot requirements for conduction-cooled, CCAs of the double-height, nominal 160 mm, Eurocard format.
1.2 Environmental Requirements
The prime use of CCAs developed according to this specification is for environments with extreme temperature, shock, and vibration. However, there are other applications for which this specification is suitable.
2. Purpose
The purpose of this standard is to ensure mechanical interchangeability of conduction-cooled CCAs in a format suitable for military and rugged applications. The CCAs shall also be compatible with commercial, double-height. 160 mm Eurocard chassis.
3. References
The following documents form a part of this standard to the extent referenced herein. The revisions of these documents to be used arc those current at the commencement of a design activity. In the event of conflict between the documents referenced herein and the contents of this standard, the contents of this standard will be considered a superseding requirement.
[1] IEEE Std 1014-1987, IEEE Standard lbr a Versatile Backplane Bus: VMEbus (ANSI).
[2] IEEE Std 1101.1-1991, IEEE Standard for Mechanical Core Specifications for Microcomputers Using IEC 603-2
Connectors (ANSI).
[3] P1156.1. Environmental Specifications for Computer Modules (Draft No. 3.2. Nov. 19, 1991).2
[4] MIL-C-55302/131, Connectors, Plug, Electrical, Printed Circuit Subassembly and Accessories: Right Angle, Pin Contact, 64 or 96 Contact Positions for Printed Wiring Board (.100 inch spacing).3
[5] MIL-C-55302/1 32, Connectors, Plug, Electrical. Printed Circuit Subassembly and Accessories: Receptacle. Socket Contacts, Straight Through, 64 or 96 Contact Positions fbr Printed Wiring Board (.100 inch spacing).
[6] MIL-P-551 10, Printed Wiring Boards.
[7] MIL-STD-454, Standard General Requirements for Electronic Equipment.
4. Special Word Usage, Definitions, and Acronyms
4.1 Special Word Usage
may. A key word that indicates flexibility of choice with no implied preference.
shall. A key word indicating a mandatory requirement. Designers shall implement all such mandatory requirements to ensure interoperahility with other products that meet this specification.
should. A key word indicating flexibility of choice with a strongly preferred implementation. The phrase ii is recommended is used interchangeably with the key word.
4.2 Definitions
height: By convention, the height axis is parallel to the connectors. (Refer to Fig 1.)
depth: By convention, the depth axis is perpendicular to the connectors in the plane of the PWB. (Refer to Fig 1.)
width: By convention, the width axis is perpendicular to the PWB. (Refer to Fig 2.)
bottom edge: By convention, that edge of the module that is seen counterclockwise from the faceplate when viewing the component side.IEEE 1101.2 pdf download.