This type of signal is used by the majority of transmitters, plcs and distributed control systems. Namur recommendation ne 53 software and hardware changes for field and signalprocessing devices with digital electronics overview of current software and hardware changes with link to the respective manufacturer information. With that information, its easier to detect a fail high condition on a level transmitter, for example, that clearly tells you whether you have a full tank or a failed instrument. If individual documents are only sporadically required for your own use each year, namur recommendations and namur worksheets can also be obtained individually from publishing company beuthverlag. We have been representing the interests of our members for more than 65 years. Namur ne43 standardization of 420ma signal levels namur alarm and saturation levels. Namur ne43 analog output signal namur ne43 is a standard used to define the operating aoll and aoul values. Discover the world of namur and get a deeper insight into the association. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The namur ne43 is a recommendation which gives a guideline how a sensor fault can be indicated to a control system by means of the 420ma signal. No marshalling cabinet or crosswiring, fewer wires, much less work and fewer contact points for potential failures. Namur ne43 standard archives instrumentation tools.