[Design Application]
A Guide To Dot-Ten (IEEE 1101.10)
This Standard Covers Mechanical Improvements, Including EMI Shields, Connector Keying, And Injector/Extractor Handles.
Alignment Pin: The IEEE 1101.10 standard defines an alignment pin with the following features: assurance of parallel connector mating, an option for a front-panel ESD contact, and alignment for the shielded front panel. The alignment pin is located on the front panel assembly, and interfaces with the alignment pin receptacle in the card guide.
ESD Protection: The IEEE 1101.10 specifies two important features that help provide ESD (electrostatic discharge) protection:
Card Guide ESD clip: A plug-in board may acquire static buildup while outside of the system. When the plug-in board is inserted into the system, the charge might discharge though the backplane connector, disrupting or even damaging the system. A feature in the card guide discharges any built up static from the plug-in board into the card-guide ESD clip, which is connected to the subrack frame ground. Depending on the design, the plug-in board may make continuous contact to the subrack frame, or may break contact to the frame prior to connector engagement.
Alignment Pin ESD clip: Plug-in board front panels may conduct static through the system integrator or technician handling them. The IEEE 1101.10 standard defines an alignment pin that can provide a discharge path to the subrack frame.
Protective Side Covers: The standard defines a protective side cover for those applications requiring solder side protection to plug-in boards. These covers provide mechanical protection to the ESD gasket of an adjacent board as well as the solder tails or surface-mount devices on the solder side of the board. This cover also provides electrical protection from adjacent boards when the plug-in board is inserted or extracted from a live system.
Card Guides: The IEEE 1101.10 standard defines the dimensions of the card guide to allow intermateability with the plug-in boards. Other defined features are the keying chambers, alignment pin chamber, and provision for ESD contacts that can be built into the guide.
Card Guide Mounting Rails: The standard defines the feature in the mounting rail for injector/extractor surfaces. These surfaces allow the handle to inject or extract the plug-in board. The standard also defines the dimensions to allow multivendor handles to work with any IEEE 1101.10-compatible subrack.
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