Patton electronics ForeFront 6676, Руководство пользователя

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1 • Introduction Model 6676 6U CPCI Chassis Assembly User Guide
18 Introduction
Figure 6. EMC strip and gasket on chassis and cards
The EMC strip on the left side of the board (see figure 6 ) mates with the EMC gasket attached to the chassis
when it is plugged into the first slot. Each board mates together with corresponding gaskets/strips.
Note
EMC gaskets/strips are in reverse order at the rear of the 6U chassis.
That is, the EMC strip is on the left of the chassis and the EMC gas-
ket is on the right. Consequently, rear transition boards are likewise
in reverse order to the front-entry boards. The EMC gasket is on the
left, and the EMC strip is on the right.
In addition, all aluminum and steel components of the subrack are surface treated and conductive. Top, bot-
tom, sides and rear EMC covers provide mechanical protection and EMC shielding on the subrack. Retaining
clips ensure conductive connection.
Electrostatic discharge (ESD) protection
The 6676 ForeFront Xtreme chassis provides ESD protection in compliance with IEEE 1101.10. ESD con-
tacts are embedded inside and in the front section of card guides for making early as possible contact with a
discharge strip on one or both, the upper and/or lower edge of the plug-in board/module. Only the card guides
located at the bottom rail of the chassis (right vertical rail for the 6U chassis), both front and rear (when there
is a transition module present in the chassis), contain the ESD clips. The ESD clip in the card guide is con-
nected to the Chassis GND (ground).