The choice of the proper cable or line for transmitting signals on your own machine has essential influence on the device availability. Usually, when determining the instruments of machines and plants, a profound level of attention is given to deciding on the best sensors.
For example, an individual determines which measuring principles are used for level measurement, which power should be provided to the device and which kind of signal transmission ought to be used. Usually, the cables shown in the wiring schemes as simple connection lines between sensor and SPS are problematic. This poses an interesting paradox in the automation technology ? Fide is tested for highest demands to make sure it meets the requirements of the application, whereas a cable is merely seen as a component which supposedly guarantees a trusted connection under all circumstances.
However, cables and connectors pose one of the most frequent resources of error. This is often where unforeseen potential for increasing machine availability can be found. During my span of research I learned that in a higher two-digit percentage of all cases, renowned cable manufacturers traced back sensor failure on machines to mechanical failure of the cable due to faulty installation, handling and especially as a result of choice of an unsuited cable for the specific application. Principally, there is no patent fix for determining which cable and which plug connector is most beneficial suitable for your application.
For example, flexibility demands for cables used in level probes for level measurement in deep wells aren?t high, whereas the demands on tensile strength and also high longitudinal and transverse water tightness are. In level probes, plug connectors are barely ever applied as a result of lack of permanent leak tightness. For machine tools which are set up in factory buildings, the simplest cable materials with a simple M12 connector are employed. In cases like this, however, the use of a suitable cable that permanently withstands ambient conditions such as for example temperature fluctuations and that features resistance against oils and fats can significantly increase the option of your machine.
The usage of cable assemblies with factory pre-assembled connectors also prevents failure risk through improper on-site assembly. It is therefore a fallacy that all cables are the same and that any given cable with the sufficient amount of wires would work for an application.
In another of my previous articles, I drew up a short overview of the most relevant criteria for choosing cables and connectors. Take your time in specifying a suitable cable for the application. Think about the demands your plug link with sensors and PLC must meet. Surefire matched wiring concept offers a measurable increase of the device availability and higher safety during operation.
In the event you need assistance or consulting for specifying a suitable pressure sensor and associated cable / connector, feel free to contact us.g