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Backplane Connectors - Hard Metric, StandardBackplane connectors are cables that join boards and subsystems together to form complete systems. In order to do this, they must be capable of carrying certain types of signals and data, while still staying within safe electrical limits. Because of this, backplane connectors come in two main types - hard metric and standard. Each type of backplane connector has different characteristics and applications.Hard MetricHard metric backplane connectors are designed to be highly specialized for specific tasks. They are typically employed in very high speed electronics applications where signal integrity is of the utmost importance. These connectors are characterized by their tight tolerances and high speeds, up to 18.5 Gbps. Examples of hard metric backplane connectors include the VMEbus and CompactPCI.Hard metric connectors are typically specified by the IEC 603-1 standard, although there are a few alternatives. All of these connectors will feature elements such as differential pairs, ground or shield pins, and power or signal contacts in a variety of configurations.The main advantage of hard metric backplane connectors is that they offer superior speed and signal integrity compared to standard backplane connectors. They are also highly configurable, allowing for the best mix of signal and data transmission.StandardStandard backplane connectors are designed to fit many different types of applications. They are typically used in lower speed applications that do not require the tight tolerances of hard metric connectors. Some common examples of standard backplane connectors include the ISA and PCI buses.Standard backplane connectors typically feature a variety of contacts, such as differential pairs, ground or shield pins, power contacts, and a variety of other signal and data contacts. These connectors are often specified by the IEC 603-2 standard.The main advantage of standard backplane connectors is that they are relatively inexpensive and can be used in many different types of applications. They also offer a wide range of signal and data transmission options.ConclusionBackplane connectors are essential components in a variety of electronic systems. They come in two main types – hard metric and standard. Hard metric connectors are designed for very high speed applications and are highly configurable, while standard connectors are designed for general purpose use and are relatively inexpensive. Both types offer a variety of signal and data transmission options, making them essential elements in virtually any electronic system.

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