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127050-0097 Datasheet(PDF) 72 Page - ITT Industries |
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127050-0097 Datasheet(HTML) 72 Page - ITT Industries |
72 / 76 page Dimensions are shown in mm (inch) Dimensions subject to change 71 ZIF Connectors Glossary of Terms Glossary of Terms In every job speciality there are certain words and phrases used by the ‘‘insiders’’ which after a time become almost a language unique to that speciality. DL Zero Insertion Force (ZIF) technology is a typical example of that condition. This page provides some explanations, in an attempt to clarify some of the terms that are commonly used by engineers and sales staff at Cannon. The list is not comprehensive, but highlights many of the expressions commonly used. Should you have any comments or additions please contact us. Feedback will be appreciated. AWG — American Wire Gauge. A standard for wire diameters based on the approximate circular mil area of the wire. As numbers get larger, wire diameters decrease in size (a size 16 AWG wire has a larger diameter than a size 22 AWG). Beryllium Copper — An alloy of copper used to make contacts. It is relatively expensive, but has superior spring qualities, is resistant to fatigue, and can operate at higher temperatures than other materials such as phosphor bronze. It is used when numerous insertion and extraction cycles are required. Cable Clamp — A rear connector clamping accessory which tightens over a cable or wire bundle to provide strain relief to the cable. The cable clamp may be part of a more elaborate endbell or it may be used alone. Contact Retention — The maximum allowable axial load which can be applied to a contact from either direction without it being dislodged from the insulator. Usually stated in Newtons or pounds of force. Contact Spacing — The distance between the centers of adjacent contacts. Crimp — A method of attaching a contact to a wire through the application of pressure. Crimp Contact — A contact which is terminated to a wire by means of crimping with an appropriate die and tool. After termination, an insertion tool is normally used to insert the crimped contact into the connector. Removable crimp contacts can be FRONT RELEASE or REAR RELEASE. An extraction tool is usually required to remove the contact. Cross Talk — Undesired electrical currents in conductors caused by electromagnetic or electrostatic coupling from other conductors or from external sources. Also, leakage of optical power from one optical conductor to another. Derating — To reduce the voltage, current, or power rating of a connector to improve its reliability or to permit operation at high ambient temperatures or altitudes. Derating Curve — A graph of the change in power handling capability of a connector as a function of ambient temperature or altitude. Typically the graphed function is curved, hence the name. EMI/RFI — Electro-Magnetic Interference and Radio Frequency Interference. This is unwanted stray electronic radiation which may enter, and/or be emitted by an electronic system. The most common method of shielding interconnections against this radiation is to use wires with a metallic braided shield and a connector system which will extend the shield through the interconnection. This type of design will keep radiation from entering, or being emitted by the system. Endbells for shielded cable and connectors with threads or grounding fingers are typically used for this purpose. Call for the specific EMI/RFI accommodations of the connectors in this catalog. Extraction Tool — A device used to remove a (removable) contact from a connector insulator. The extraction tool may be inserted into the mating face of the insulator (FRONT RELEASE) or the wire side (REAR RELEASE). In either case, the contact comes out the rear, or wire side, of the connector. Flash Plating — As commonly used in connector terminology, flash refers to extremely thin platings of metal, for example: gold flash is a very thin plating of gold. So thin, that the thickness is generally not specified. Insertion Tool — A small, handheld tool used to insert contacts into a connector. Mating Life — The minimum number of times a connector can be mated and unmated and still meet all of its design specifications. The maximum life may be much higher than this figure. Operating Temperature — The range of AMBIENT TEMPERATURES over which the connector can operate and still meet all of its design specifications. PC Contact — A pin or socket contact that has a post opposite the mating end which is intended to be soldered directly to a printed circuit (PC) board instead of being terminated to a wire. The solder post may come in square post and or round pin configurations. Polarization — A mechanism that allows connector halves to intermate in only one specific orientation. This can be accomplished by asymmetrical shapes of the two halves as in a D Subminiature connector, insulator rotation, keys, keyways, ramps, or other means. Polar- ization prevents connectors of the same size and/ or same layout from intermating when this is undesirable, such as when two otherwise identical connectors are used on the same panel. Polarization is typically done by the assembler and cannot be changed by the user, while keying is typically done by the user with an auxiliary keying device. Removable Contact — A contact which can be inserted and removed from the insulator by the user. An insertion tool and extraction tool are normally required to insert and remove the contact. Selective Plating — The application of metal PLATING to selective areas of the contact, particularly those areas subject to wear. Precious metal platings may be applied selectively to those contact surfaces responsible for the electrical connection, reducing the contact cost without sacrificing electrical performance. Thermoplastic — A plastic material that can be softened by heat and rehardened into a solid state by cooling. This process can be accomplished using a variety of techniques. UL — Abbreviation for Underwriter’s Laboratories, a corporation supported by a group of underwriters for the purpose of establishing safety standards covering certain types of equipment and components in the United States. UL 94V-O — A flammability performance rating set by Underwriter’s Laboratories for plastics. Wire Size — The numerical designation for conductor diameter. This catalog uses American Wire Gauge (AWG) which is based on the approximate circular mil area of the wire. Also see AWG. Wrap Post Contact — A type of contact which is terminated by wrapping wire around a post in a manner that deforms the wire and creates a gas- tight connection between the wire and the post. This method is slow and labor intensive. If used at all, it is used in prototype work. Zero Insertion Force Connector (ZIF) — A connector designed in such a way that the contacts do not mechanically touch until the two connector halves have been jointed and a compression mechanism has joined the contacts together. A ZIF connector has extremely low insertion and removal forces making it possible to easily mate very large numbers of contacts with virtually no wear. |
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