Electrical Noise Reduction in Industrial Control Systems

Equipment malfunctions caused by electrical noise transients have costly consequences. This unacceptable economic drain indicates that effective programs and practices be established to eliminate the adverse effects of noise. The responsibility for noise control falls to three principal participants in the installation; the equipment builder, the installer, and the user. Each must assume his share of the responsibility. Of these three, the equipment builder has the decisive initiative. The degree of noise immunity enjoyed by the installation will largely be determined by his packaging, wiring, and installation recommendations. The evolution of a noise control program is described along the following lines: recognition of noise as a serious problem; identification of noise sources, types, and methods of propagation; development of simple but effective noise reduction techniques; and application of these techniques to working systems.