Ovation PLC DCS Spare Parts 1X00416H01 WH5-2FF

Introduction

A wide variety of analog and/or digital circuits are associated with the Ovation System’s installation. There are low-level voltage circuits, high-level voltage circuits, circuits that transfer information, and circuits that transfer power. These circuits are placed into two categories: noise-producing circuits and noise-sensitive circuits. Noise problems typically occur when transmitting analog (voltage, current, and other measured values) or digital information (on/off conditions, pulse trains or similar data) via inter-connected or wired circuits.

The information carried by signals in such circuits may become distorted during transfer and errors may result from this distortion. The difference between the signal of transmitted information and the signal of that information as received is called noise (see Figure 2-1 and Figure 2-2). The noise minimization techniques briefly described in this section focus on preventing errors by either eliminating the noise, or when elimination is not possible, performing steps to lessen its impact.

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