ENTERASYS A201SR04 01A201S12 5880-0009 CPU module

The ideal single-point signal ground network is one in which separate ground conductors extend from one point on the facility ground to the return side of each of the numerous circuits located throughout a facility. This type of ground network requires an extremely large number of conductors and is not generally economically feasible. In lieu of the ideal, various degrees of approximation to single-point grounding are employed. The configuration illustrated by figure 3-34 closely approximates an ideal single-point ground. It uses individual ground buses extending from an earth electrode subsystem to each separate electronic system. In each system, the various electronic subsystems are individually connected at only one point to this ground bus. (b) Another frequently used approximation to the ideal is illustrated in figure 3-35. Here the ground bus network assumes the form of a tree.

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