HD 493.3 S1:1988

Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3: Subracks and associated plug-in units HD 493.3 S1:1988

Scope

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: IEC 249-2 (1970): Base Materials for Printed Circuits - Part 2: Specifications - IEC 297 (1975): Dimensions of Panels and Racks - IEC 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 - IEC 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