EMERSON KJ3201X1-BA1 Analog output module

Shielding. Groups of equipment or subsystems may be made EM compatible by any combination of three fundamental approaches: the interfering signal level may be reduced, the receptor susceptibility may be reduced, or the attenuation of the path or paths over which interference is transmitted from source to receptor may be increased. Radiated interference signals generated by EM fields may be effectively attenuated by EM shielding, either at the source or at the receptor. Shielding, when properly designed and implemented, offers significant wideband protection against EM radiation, where source and receptor are not sufficiently separated for adequate free space radiation attenuation. (1) It is relatively easy to obtain 40 decibels (dB) of shielding effectiveness in a frequency range above 100 kHz with a single shield, and values as high as 70 dB can be obtained with careful singleshield construction.

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