IEC Dimensions of Mechanical Structures of the mm (19 in) Series Part 1: Panels and Racks. IEC Mechanical structures for electronic equipment – Dimensions of mechanical structures of the ,6 mm (19 in) series – Part Basic. IEC Dimensions of Mechanical Structures of the mm (19 Inch) Series Part 2: Cabinets and Pitches of Rack Structures.
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The height of the different panels will vary, The holes in the posts are arranged vertically in repeating sets of three, with center-to-center separations of 0. Rack-mountable equipment is traditionally mounted by bolting or clipping its front panel to the rack.
As a result, 4-post racks have become common, with such racks featuring a mirrored pair of rear mounting posts. These cases are marketed to musicians and entertainers for equipment not subject to frequent transportation and rough handling.
Production of clearance-hole racks is less expensive because tapping the holes is eliminated and replaced with fewer, less expensive, cage nuts. For instance, most optical disc players will not work upside-down because the driving motor mechanism does not grip the disc.
Touring musicians, theatrical productions and sound and light companies use road case racks. For rack mounted computer servers, devices generally intake air on the front and exhaust on the rear.
Raised or false floor cooling ic server rooms can serve a similar purpose; they permit cooling airflow to equipment through the underfloor space to the underside of enclosed rack cabinets. A blade server enclosure might require 10U.
Examples include telephone exchanges, network cabling panels, broadcast studios and some government and military applications. Although open-frame racks are the least expensive, they also expose air-cooled equipment 6097 dust, lint, and other environmental contamination. Once serial production started, they were built into custom-made racks, one per repeater. Installation and removal of hardware in a square hole rack is very easy and boltless, where the weight of the equipment and small retention clips are all that is necessary to hold the equipment in 6297.
Wikimedia Foundation servers as seen from the front.
Computer servers designed for rack-mounting can include a number of extra features to make the server easy to use in the rack:. Physical Protection, are available,  with Zone 4 representing the most 60279 environment. Two-post racks provide two vertical posts. Thus, a 1U rackmount computer is not 1.
The shape of small cases is maintained by the rack rails and the cover seal extrusions alone. Road cases are typically made from polyvinyl chloride PVC laminated plywood sides, joined by extruded aluminum edging, steel corners, handles and latches. The earliest repeaters from were installed in ad-hoc fashion on shelves, in wooden boxes and cabinets. Two-post racks are most often used for telecommunication installations.
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Hole spacing is 25 millimetres 0. A third common use for rack-mounted equipment is industrial power, control, and automation hardware. Patent 3,granted June 4, This is usually required by local building codes in seismic zones. The gap between the posts is millimetres The amount of motion and resulting 602297 depends on the structural characteristics of the building and framework in which the equipment is contained, and the severity of the earthquake.
Archived from the original on Road case racks come in different heights based on the 1U standard and different depths. All Wikipedia articles needing words, phrases or quotes attributed Wikipedia articles needing words, phrases or quotes attributed from November Commons category link is on Wikidata.
inch rack – Wikipedia
Newer server rack cabinets come with adjustable mounting rails allowing the user to place the rails at a shorter depth if needed. Square-hole racks allow boltless mounting, such that the rack-mount equipment only needs to insert through and hook down into the lip of the square hole. For example, 600297 oscilloscope might be 4U high, and rack-mountable computers are mostly between 1U and 4U high.
The rack unit is a measure of vertical spacing and is common to both the 19 and 23 inch racks. Nineteen-inch racks are also often used to house professional audio and video equipment, including amplifiers06297 unitsinterfaces, headphone amplifiers, and even small scale audio mixers. In contrast to the “inch world”, ETSI also defined the size of the rack enclosure: From Wikipedia, the free encyclopedia.
A variety of airflow patterns can be found, including front intakes and rear exhausts, as well as side intakes and exhausts.