engr_joni_ee
Advanced Member level 3
In an electronics discussion in which they need to put few dozens of PCBs in a structure called VME crates or racks. I am wondering about their standard dimensions and manufacturers.
Some info that I just found.
A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide.
The height of the electronic modules is also standardized as multiples of 1.75 inches (44.45 mm) or one rack unit or U.
Height is measured in rack units, "U", with 1 U being 1.75 in (44.45 mm).
1 U = 44.45 mm height
3 U = 133.35 mm height (max 100 mm card)
6 U = 266.70 mm height (max 233.35 mm card)
Enclosure heights are multiples of 3U, with the cards always 33.35 mm (1.313 in) shorter than the enclosure.
Two common heights are 3U (a 100 mm card in a 5.25 in (133.35 mm) subrack) and 6U (a 233.35 mm card in a 10.5 in (266.70 mm) high subrack).
What is the depth of 19-inch rack ?
Which companies manufactured them ?
What about back end connectors ?
Some info that I just found.
A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide.
The height of the electronic modules is also standardized as multiples of 1.75 inches (44.45 mm) or one rack unit or U.
Height is measured in rack units, "U", with 1 U being 1.75 in (44.45 mm).
1 U = 44.45 mm height
3 U = 133.35 mm height (max 100 mm card)
6 U = 266.70 mm height (max 233.35 mm card)
Enclosure heights are multiples of 3U, with the cards always 33.35 mm (1.313 in) shorter than the enclosure.
Two common heights are 3U (a 100 mm card in a 5.25 in (133.35 mm) subrack) and 6U (a 233.35 mm card in a 10.5 in (266.70 mm) high subrack).
What is the depth of 19-inch rack ?
Which companies manufactured them ?
What about back end connectors ?
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