What you should know about analog technology
2.12 Interference voltage suppression
Analog value processing
32
Function Manual, 06/2014, A5E03461439-AC
2.12
Interference voltage suppression
Definition
Interference voltage suppression gives the factor by which the interference signal is
suppressed in measurement value acquisition. Higher values reduce the effect of
interference on the measurement signal. The technical data differentiates between "Common
mode interference" and "Series mode interference". Interference voltage suppression is
specified in decibels.
Example
The diagram below shows the measuring error for interference voltages in volts and
interference voltage suppression of 0 to 120 dB.
Figure 2-17 Interference voltage suppression
With an interference voltage suppression of 40 dB and an interference voltage of 1 V, the
measured value is only distorted by 0.01 V.
Note
Interference-free design
Disturbance variables can be substantially reduced by means of appropriate grounding and
shielding to increase interference immunity of the configuration. You will find a detailed
description of how to avoid interference in the Configuring interference-free controllers
http://support.automation.siemens.com/WW/view/en/59193566
) function manual.
Summary of Contents for SIMATIC ET 200AL
Page 2: ......
Page 143: ......
Page 218: ......
Page 250: ......
Page 296: ......
Page 337: ......
Page 365: ......
Page 392: ......
Page 419: ......
Page 451: ......
Page 483: ......
Page 597: ......
Page 648: ......
Page 702: ......
Page 739: ......
Page 781: ......
Page 804: ......
Page 828: ......
Page 853: ......
Page 880: ......
Page 906: ......
Page 996: ...Diagnostics ...
Page 1121: ......
Page 1565: ......