GB/T 19520.4-2004 Mechanical structures for electronic equipment-Dimensions of mechanical structures of the 482,6mm(19 in)series-Part 4:Subracks and associated plug-in units-Additional dimensions (English Version)
This section is related to the 482.6 mm (19 in) series of equipment structures, in which plug-ins with or without plug-in connectors adopt connectors in accordance with GB/T 15157.2. This standard intends to ensure mechanical interchangeability and intermateability between inserts and subracks. Subracks and inserts need not correspond to the schematic diagrams of this standard, but the specified dimensions shall be used. The manufacturer is free to select unspecified dimensions and tolerances as required. The purpose of this standard is to ensure the dimensions and details of the active surfaces of printed boards, inserts, interposers and subrack interposers. Printed boards and plug-ins use connectors that comply with GB/T 15157.2.
GB/T 19520.4-2004 history
2009GB/T 19520.12-2009 Mechanical structures for eletronic equipment.Dimensions of mechanical structures of the 482.6 mm(19 in) series.Part 3-101:Subracks and associated plug-in units
2004GB/T 19520.4-2004 Mechanical structures for electronic equipment-Dimensions of mechanical structures of the 482,6mm(19 in)series-Part 4:Subracks and associated plug-in units-Additional dimensions
GB/T 19520.4-2004 Mechanical structures for electronic equipment-Dimensions of mechanical structures of the 482,6mm(19 in)series-Part 4:Subracks and associated plug-in units-Additional dimensions was changed to GB/T 19520.12-2009 Mechanical structures for eletronic equipment.Dimensions of mechanical structures of the 482.6 mm(19 in) series.Part 3-101:Subracks and associated plug-in units.