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 posts have holes in them at regular intervals, with both posts matching, so that each hole 6097 part of a horizontal pair with a center-to-center distance of The First Stored Program Computer.
Patent 2,granted Oct. Road cases are typically made from polyvinyl chloride PVC laminated plywood sides, joined by extruded aluminum edging, steel corners, handles and latches. Holes so arranged can either be tapped usually UNF thread, or, less often, 6mm metric or have square holes for cage nuts.
However, some rack equipment has been designed to make fan replacement easy, using quick-change fan trays that can be accessed idc removing the cabling or the device from the rack, and in some cases without turning off the device irc that operation is uninterrupted during replacement.
A third common use for rack-mounted equipment is industrial power, control, and automation hardware. Nineteen-inch racks in two-post or four-post form hold most equipment in modern data centersISP facilities, and professionally designed corporate server rooms.
Occasionally, one may see fractional U 6029 such as a 1. The gap between the posts is millimetres These cases can be isolated by thick layers of foam or may use spring-loaded shock mounting.
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A key structural weakness of front-mounted support is the shear stress placed on the mounting rails and the leading edge of the equipment. Older equipment meant for round-hole or tapped-hole racks can still be used, with the use of cage nuts made for square-hole racks.
Portable rack cases using 602297 rotary-molded polyethylene outer shell are a lower-cost alternative to the more durable ATA-approved case. End covers are typically secured with either a simple draw latch or a rotary cam “butterfly” latch, named for the shape of the twist handle.
Road case racks come in different heights based on the 1U standard and different depths. The holes are large enough to permit a bolt to be freely inserted through without binding, and bolts are fastened in place using cage nuts.
Two-post racks are most often used for telecommunication installations. Production of clearance-hole racks is less expensive because tapping the holes is eliminated and replaced with fewer, less expensive, cage nuts. There are a multitude of specialty server racks including soundproof server racks, air conditioned server racks, NEMA rated, seismic rated, open frame, narrow, and even miniature inch racks for smaller applications.
A standard inch server rack cabinet is typically 42u in height, 19 inches Square-hole racks allow boltless mounting, such that the rack-mount equipment only needs to insert through and hook down into the lip ie the square hole. A blade server enclosure might require 10U. 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 Raised or false floor cooling in server rooms can serve a similar purpose; they permit cooling airflow to equipment through the underfloor space to the underside of enclosed rack cabinets.
APC SX-range racksit is common for equipment that features 4-post mounting brackets to have an adjustable rear bracket. When rack rails are too thin to tap, rivnuts or other threaded inserts can be used, and when the particular class of equipment to be mounted is known in advance, some of the holes can be omitted from the mounting rails.
The amount of motion and resulting stress depends on the structural characteristics of the building and framework in which the equipment is contained, irc the severity of the earthquake. Many wall-mounted industrial equipment enclosures have inch rack rails to support mounting of equipment. 06297 inch ie is a standardized frame or enclosure for mounting multiple 60927 equipment modules.
Rack-mountable equipment is usually designed to occupy some integer number of U. When in place, the equipment may also then be bolted to the rack. See also Industrial PC.
Originally, the mounting holes were tapped with a particular screw thread. Non-isolated cases simply mount inch mounting rails inside the case. Racks, especially two-post racks, are often secured to the floor or adjacent building structure so as not to fall over.
For instance, most optical disc players will not work upside-down because the driving motor mechanism does not grip the disc. Each module has a front panel that is 19 inches However, not all equipment is suitable for this type of mounting.
This is usually required by local building codes in seismic zones. For example, an oscilloscope might be 4U high, and rack-mountable computers are mostly between 1U and 4U high. Ina durable fiber reinforced plastic inch rackmount case was patented by ECS Composites and became widely used in military and commercial applications for electronic eic and operation.
A variety of airflow patterns can be found, including front intakes and rear exhausts, as well as side intakes and exhausts.