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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Rack-mountable equipment is usually designed to occupy some integer number of U.
List of International Electrotechnical Commission standards. Two-post racks provide two vertical posts. There are a multitude of specialty server racks including soundproof server racks, air conditioned server racks, NEMA rated, seismic rated, ifc frame, narrow, and even miniature inch racks for smaller applications.
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Low-wattage devices may not employ active cooling, but use only passive thermal radiation and convection to dissipate heat. In the case of network equipment, it may be necessary to unplug 50 or more iecc from the device, remove the device from the rack, and then disassemble the device chassis to replace the fans.
In contrast to the “inch world”, ETSI also defined the size of the rack enclosure: For example, an oscilloscope might be 4U high, and rack-mountable computers are mostly between 1U and 4U high. Racks are divided into regions, Examples jec telephone exchanges, network cabling panels, broadcast studios and some government and military applications.
From Wikipedia, the free encyclopedia.
Larger cases typically have wheels for easy transport. A rack’s mounting fixture consists of two parallel metal strips also referred to as “posts” or “panel mounts” standing vertically. Threaded mounting holes in racks where the equipment is frequently changed are problematic because the threads can be damaged or the mounting screws can break off; both problems render the mounting hole unusable.
A difficulty with forced air fan cooling in rack equipment is that fans 600297 fail due to age or dust. Occasionally, one may see fractional U devices such as a 1. The polyethylene shell is not fiberglass reinforced and is not rigid. Originally, the mounting holes were tapped with a particular screw thread. Tapping large numbers of holes that may never be used is expensive; nonetheless tapped-hole racks are still in use, generally for hardware that rarely changes.
19-inch rack
The strength required of the mounting posts means they are invariably not merely flat strips but actually a wider folded iiec arranged around the corner of the rack. With the prevalence of inch racks in the Telecoms industry, the same practice is also common, but with equipment having inch and inch brackets available, enabling them to be mounted in existing racks. Hole spacing is 25 millimetres 0.
The height of a rack can vary from a few inches, such as in a broadcast console, to a floor mounted rack whose interior is 45 rack units Two-post racks are most often used for telecommunication installations. Non-isolated cases simply mount inch mounting rails inside the case.
inch rack – Wikipedia
A pair of rails is mounted directly onto the rack, and the equipment then slides into the rack along the rails, which support it. The size denotes the width of the faceplate for the installed equipment. Equipment can be mounted either close to its center of gravity to minimize load on its front panelor via the equipment’s front panel holes. By using this site, you agree to the Terms of Use and Privacy Policy.
A standard inch server rack cabinet is typically 42u in height, 19 inches Since the mounting hole arrangement is vertically symmetric, it is possible to mount rack-mountable equipment upside-down. The distance of the right edge of the right mounting rail to the left edge of the 600297 mounting rail is millimetres Wikimedia Foundation servers as seen from the front.
In the event of a nut being stripped out or a bolt breaking, the nut can be easily removed and replaced with a new one. This page uec last edited on 12 Decemberat The posts are each 0. George, Chassis Slide MechanismU. Retrieved from ” https: The rack unit is a measure of vertical spacing and is common to both the 19 and 23 inch racks. The cases ifc use extruded aluminum bands at the ends of the body with tongue-and-groove mating to like bands for the covers.
The inch rack format with rack-units of 1. Heavy equipment or equipment which is commonly accessed for servicing, for which attaching or detaching at all four corners simultaneously would pose a problem, is often not mounted directly onto the rack but instead is mounted via rails or slides.
These posts are typically heavy gauge metal or extruded aluminum. Road cases are typically made from polyvinyl chloride PVC laminated plywood sides, joined by extruded aluminum edging, steel corners, handles and latches. Byit was an established standard with holes tapped for screws with alternating spacings of 1. Physical Protection, are available, [10] with Zone 4 representing the most demanding environment.
The amount of motion and resulting stress depends on the structural characteristics of the building and framework in which the equipment is contained, and the severity of the earthquake. This prevents circular airflows where hot exhaust air is recirculated through an adjacent device and causes overheating. The height of the electronic modules is also standardized as multiples of 1.