IEEE Std 1301.1-1991 IEEE Standard for a Metric Equipment Practice for Microcomputers—Convection-Cooled with 2 mm Connectors -Description

Abstract: Requirements are presented for subracks, plug-in units, printed boards, and backplanes to be used in conjunction with IEEE Std 1301-1991 and with a 2 mm connector as defined in EIA IS-64 (1991). The general arrangement, dimensions, and environmental requirements are covered. This standard may be used with other P1301.x connector implementations in the same subrack.

Content

• 1. Introduction
• • 1.1 Scope
  • 1.2 Purpose
  • 1.3 Dimensions
  • 1.4 Coordination Dimensions
  • 1.5 Environmental Requirements
  • 1.6 Conformance
• 2. References
• 3. Special Word Usage, Definitions, and Abbreviations
• • 3.1 Special Word Usage
  • 3.2 Definitions
• 4. Dimensional Nomenclature
• • 4.1 Dimensional Location Nomenclature
  • 4.2 Dimensional Nomenclature, Heights
  • 4.3 Dimensional Nomenclature, Widths
  • 4.4 Dimensional Nomenclature, Depths
  • 4.5 Dimensional Nomenclature, Mounting Pitches
• 5. General Arrangement
• 6. Subracks
• 7. Backplane Design and Mounting Positions
• 8. Plug-in Units
• Annex A Pin Length, Backplane Bow, and Pin Wipe
• • A1. Scope
  • A2. Definitions
  • A3. Relationships between Parameters
  • A3.1 Gap
  • A3.2 Allowance for Different Pin Lengths
  • A4. Plug-in Unit Tilt
  • A4.1 Cases to Be Considered When Estimating Tilt
  • A4.2 Assumptions
  • A4.3 Effect on Pin Wipe
  • A4.4 Effect on Sequencing
  • A4.5 Issue of 5 mm Pins
  • A4.6 Recommendations

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