This standard covers the basic dimensions of a modular range of subracks for mounting in equipment according to IEC Publication 297, together with the basic dimensions of a compatible range of plug-in units and printed boards.
This standard covers also the connector-dependent dimensions to be used when two-part connector types according to IEC Publication 603-2 are mounted on subracks and plug-in units. It specifies also the standard positions of free connectors such that plug-in units are mechanically interchangeable in subracks with corresponding fixed connector positions.
Subsequent appendices will give the dimensions of associated plug-in units using suitable connectors standardized or to be standardized by the IEC, together with applicable detail dimensions of the subracks.
This standard should be used in conjunction with the following IEC publications: Publications Nos. 249-2 (1970): Base Materials for Printed Circuits, Part 2: Specifications.
297 (1975): Dimensions of Panels and Racks.
603-1(1981): Connectors for Frequencies below 3 MHz for Use with Printed Boards, Part 1: General Rules and Guide for the Preparation of Detail Specifications.
603-2(1980): Part 2: Two-part Connectors for Printed Boards, for Basic Grid of 2.54 mm (0.1 in), with Common Mounting Features.
note:* When revised, IEC Publication 297 (Second edition, 1975) will become IEC Publication 297-1: Dimensions of Mechanical Structures of the 482.6 mm (19 in) Series, Part 1: Panels and Racks.
BS 5954-3:1985 history
2005BS EN 60297-3-101:2004 Mechanical structures for electronic equipment — Dimensions of mechanical structures of the 482,6 mm (19 in) series — Part 3-101: Subracks and associated plug-in units
1985BS 5954-3:1985 Dimensions of mechanical structures of the 482.6 mm (19 in) series - Specification for subracks and associated plug-in units