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Vero Technologies electronics enclosures, Instrument cases, Hand Held, Desk Top prototyping and development circuit boards and components.
What is a Eurocard Standard?  Eurocard is a European standard format designed for printed circuit boards which can be plugged into a standardized subrack system. The subrack is made up of a series of slotted card guides where the cards are slid. Each card has one or more connectors which are plugged into a mating connector of a backplane at the rear of the subrack. The Eurocard system allows for a international standard for card dimensions which means developers are able to create a product that should be fully compatible with other systems developed under the Eurocard standards. Eurocard subracks have been standardized with all 3 dimensions. These are specified but one of the following Units:
The height of a Eurocard is 33.35mm less than that of the subrack to give space for panels and card guides. A card in a 3U rack is therefore 100mm, Also the height of two stacked 3U cards is about the same as a 6U card, allowing for a subrack to consist of a mix of 3U and 6U cards. Popular sizes of Eurocard are normally 3U and 6U height, The depth of the cards is normally either 160mm or 220mm, But other depths are available in increments of 60mm, The largest standard depth accommodated is 400mm. The Eurocard architecture was defined under IEC-60297-3, It is now widely recognised as the IEEE 1101.1 and 1101.10, The Eurocard system also incorporates another standardized system for connection which is DIN 41612. See the below link for more information: http://en.wikipedia.org/wiki/Eurocard_(printed_circuit_board) What is a DIN 41612 Connector? DIN 41612 (IEC 60603-2) is a standard designed for electrical connectors that is used primarily for rack based electrical systems. The need for a standardized system of connectors is essential in the use of open systems, Users need to have confidence that components from different suppliers will operate together. The DIN connectors may have one, two or three rows of contacts which are labelled as rows a, b and c. Two row connectors have the option of using rows a+b or a+c, and the connectors may have 16 or 32 columns which means that the possible arrangements allow 16,32,48,64 or 96 contacts. The rows and columns are on a 2.54mm grid pitch. The force for insertion and removal can be controlled with injector/ejector devices. The performance of the connectors rates at 2amps per a pin current carrying capacity and a 500v working voltage. Both figures may need to be de-rated according to safety requirements or environmental conditions. See the below link for more information: http://en.wikipedia.org/wiki/DIN_41612
What are RAL colours? RAL was a colour space system developed in 1927 by the German Reichsausschuß für Lieferbedingungen und Gütesicherung which invented a collection of 40 colours under the name 'RAL 840'. This allowed customers and manufactures to have a defined list of colours which were numbered so the two could agree on a colour a product had to be. Over time different tints of colours were added to the system which was redefined as 'RAL 840-HR' which consisted of 210 colours. In 1993 a new system was introduced 'RAL DESIGN' to meet the needs of designers, advertisers and architects, The system features 1625 colours and no longer included names for the colours and the number system follows the a scheme based on the CIELAB colour space. Each colour is assigned a 7 digit number grouped in a tripe and 2 pairs format, This represents Hue, Brightness and Saturation. See the below link for more information: http://en.wikipedia.org/wiki/RAL_(color_space_system) http://www.e-paint.co.uk/RAL_Colourchart.asp What is ABS Plastic? ABS stands for Acrylonitrile butadiene styrene and is a common thermoplastic used to make lightweight and rigid moulded products, in particular plastic enclosures. ABS consists of Acrylonitril (a synthetic monomer produced from propylene and ammonia), Butadiene (a petroleum hydrocarbon obtained from butane) and Styrene monomers (obtainable from benzene and ethylene from coal). This process gives the ABS its important rigidity and toughness, ABS is also suitable for modification such as the addition of flame resistance (UL94-V0). ABS is also resistant to aqueous acids and alkalis, concentrated hydrochloric and phosphoric acids, alcohols and animal/vegetable/mineral oils however it will dissolve in aldehyde, ketone, ester and some chlorinated hydrocarbons. See the below link for more information: http://en.wikipedia.org/wiki/Acrylonitrile_butadiene_styrene
What level of flammability exist? UL 94 is a plastics flammability standard created by Underwriters Laboratories, the standard allows for plastics to be classified according to how they burn in different orientations and thickness's. The list below shows the different ratings with the most flame retardant at the top working down to lowest.
Tests are performed on a 5”*1/2” specimen of the minimum approved thickness. For 5VA and 5VB ratings, tests are performed on both bar and plaque specimens and the flame ignition source is approximately fives times as severe as that for the other materials. See the below link for more information: http://en.wikipedia.org/wiki/UL94
What is SRBP? SRBP/FR-2 (Synthetic resin bonded paper) is a composite material made of paper that is impregnated with a plasticized phenol formaldehyde resin that is used in the manufacture of printed circuit boards (PCB). SRBP can feature a copper foil lamination on one or both sides and is widely used to build low-end consumer electronic equipment. Whilst its electrical and mechanical properties are inferior to those of epoxy-bonded fibreglass it is significantly cheaper and as such it is used in instances where cost is a factor of production. FR2 can be machined by a variety of methods including drilling, sawing and milling, but it is essential to ensure that adequate ventilation and respiration equipment is used during high speed machining as a toxic vapour is given off. See the below link for more information: http://en.wikipedia.org/wiki/SRBP What is Epoxy Fibreglass? FR-4 (Flame Retardant 4) is a type of material used for making a printed circuit board. It describes a board with no copper covering. FR-4 is fully compliant with the UL9-V0 standard. The nature of a PCB means it has to be an insulator to prevent a shorting on the board, it is also strong enough to protect the copper tracks placed on top of it. FR-4 is preferred over the cheaper alternative of SRBP due to a number of factors including its better moisture resistance, greater strength, and higher flame resistance. FR-4 is used to build high end consumer, industrial and military electronic equipment. FR-4 faces a small number of limitations when used as a PCB material, these are due to the treater-based manufacturing process used to produce the substrate from which PCB's are manufactured. Due to the treater processing the PCB's can suffer from inclusions (air bubbles) and striations (longitudinal air bubbles). These imperfections can lead to conductive anodic filaments (CAF) which are caused by electrochemical migration.
See the below link for more information: http://en.wikipedia.org/wiki/FR-4
What Is A Strip board? Strip board (invented by us and trademarked as Veroboard) is a widely used type of electronics prototyping board characterised by its 0.1inch (2.54mm) regular grid of holes, with a wide strip running one way all the way along one side of the board. Breaks can be inserted into the tracks, usually around a hole. Strip boards have evolved over time with several variants and related products now available, including a 0.15 inch grid and larger holes available but the popularity of these is less due to the fact that they don't match up to the standard IC pin spacing. Strip boards are not designed for use with surface mount components. Veroboard is similar in concept and use to Breadboard but is a cheaper and more permanent alternative as connections are soldered, This allows a limited reuse but gradual degradation from unsoldering/resoldering will likely render the components and board unusable. Veroboards are suitable for applications that need to remain in a set configuration for a extended period of time and that may be subjected to vibration or movement. See the below link for more information: http://en.wikipedia.org/wiki/Stripboard What is a Backplane? A Backplane is a circuit board that allows the connection of several connectors in a parallel to each other so that each pin of each connector is linked to the same relative pin of all other connectors forming a computer bus. It is used as a back bone to connect several PCB cards together to make up a complete computer system. Backplanes are normally used in preference to cables due to the greater reliability, If a cabled system were to be used the cables would need to be flexed every time a new card was added or removed from the system and eventually this causes mechanical failures. A backplane does not suffer from this problem and as such its service life is limited only by the longevity of the connectors on the device (the DIN 41612 connectors can withstand between 50 to 500 insertions and removals dependant on their quality) A backplane provides minimal functionality without a controlling single board computer installed providing the CPU and other computer functions. A backplane can be used without a associated Single Board Computer to simply provide power to plug-in cards. Another use of Backplanes has evolved for the connection of a number of hard disk drives to a single disk array controller found commonly in disk enclosures, arrays and servers. See the below link for more information: http://en.wikipedia.org/wiki/Backplane What is an Extender Board? When you need to extend your signal from the motherboard for testing and probing purposes you will can use an Extender Board. Many extenders offer access to the bus signals via marked probe points and some utilize multilayer technology to control the signal distortion and cross talk. The extenders come in 64/64 or 96/96 format and there are expandable heights available in 3U, 6U and 9U with the use of a standard divider plate assembly as required.
What is a IP rating? An IP (Ingress Protection) rating is a rating outlined under the EN 60529 classification which rates an enclosures effectiveness sealing for use with electrical equipment against the intrusion of foreign bodies and moisture. The classification utilises the format of IP followed by two or three numbers which are defined from the below table. An X can be used to define a product which only reaches one of the classifications e.g. IPX4 First Digit: The degree of protection a person has against contact with the moving parts(other than the smooth rotating shafts etc.) and the degree the equipment is protected against solid foreign bodies intruding into an enclosure,
Second Digit: Indicates the degree of protection of the internal equipment of the enclosure against the harmful entry of various forms of moisture e.g. dripping, spraying etc.
So a product rated as IP64 would be Dust Tight and provide protection against splashed water. See the below link for more information: http://www.protectingpeople.co.uk/fire_tech/ip_explained.htm |
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