21 July 2010Enclosures, Racks, Cabinets & Panel Products
Subracks as well as VME and CompactPCI systems are often installed above one another in the 19-inch plane of industrial cabinets. Fan trays with axial fans below the systems improve the cooling of the system positioned directly above them, but blow the hot exhaust air upwards towards the systems higher up. The result is a temperature rise in the ‘cold’ incoming air of about 10 K for each system up the height of the plane.
If one assumes an ambient temperature of 20°C, then the temperature of the air intended for cooling is already 50°C by the time it reaches the fourth system. The consequences are clear: the upper systems are inadequately cooled, performance falls and the MTBF (mean time between failures) of the electronic components is dramatically reduced.
The new Schroff airguide trays improve the heat dissipation from the vertically arranged systems by a claimed 50%. The warm exhaust air is drawn into the rear area of the cabinet and extracted through perforated doors or, in closed systems, is sucked away by a fan unit on the top panel of the cabinet. Cold air is introduced from the front. Cold and warm air are separated from each other to a large degree. Warming of the air used for cooling becomes appreciable only from the third system level, and amounts there – and for each further system mounted above – to only about 5 K.
The airguide trays are 1 U high and are fitted on the 19-inch plane between the embedded systems to separate cool incoming air from hot exhaust air.
Clearing the Static: Ensuring effective ESD control Actum
Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.
Read more...Clearing the Static: The importance of ESD audits Actum
Circuit & System Protection
An ESD audit is the first step in establishing an effective static control programme in the workplace, and will help identify vulnerable areas and potentially hazardous static zones that require improvement.
Read more...Flat-pack IT enclosure Rittal
Enclosures, Racks, Cabinets & Panel Products
The introduction of the FR IT flat-pack enclosure by Rittal marked an important milestone for the company, bringing a high-capacity, premium IT enclosure to the local market in a convenient and cost-effective flat-pack format for the first time.
Read more...Click-in module carrier frames Phoenix Contact
Enclosures, Racks, Cabinets & Panel Products
The tool-free Heavycon series click-in module carrier frame from Phoenix Contact simplifies the assembly and installation of heavy-duty connectors significantly.
Read more...Die-cast enclosures in non-rectangular formats Communica
Enclosures, Racks, Cabinets & Panel Products
These models from Hammond Manufacturing, the 1590TRP and 1590STP, provide additional flexibility for product designers who require strong aluminium enclosures, but want alternatives to the traditional rectangular form factor.
Read more...Enclosures engineered for extremes RS South Africa
Enclosures, Racks, Cabinets & Panel Products
When electronic components face the relentless demands of heavy industry or unpredictable outdoor elements, Takachi’s IP67 diecast aluminium enclosures provide a robust line of defence.
Read more...Clearing the Static: ESD containers and packaging Actum
Circuit & System Protection Vacuum forming ESD
Electronic components can be damaged by electrostatic discharges. To protect against such damage, electronic assembly parts are often transported or stored in vacuum formed component ...
Read more...Antistatic vinyl flooring Actum
Manufacturing / Production Technology, Hardware & Services
Vinyl is an affordable, antistatic tile or sheet with a life-span greater than 10 years and installed as a permanent electrostatic discharge floor.
Read more...Electrostatic discharge chairs Actum
Circuit & System Protection
An ESD chair forms an integral part of grounding within the electrostatic discharge protected area to prevent potential damage to products.
Read more...Conductive ESD footwear Actum
Circuit & System Protection
Conductive ESD footwear is used in conjunction with other grounding devices, such as a wrist strap, cord, and ESD surface mats, to provide a continuous path to ground.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version