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 quantity of attention is given to deciding on the best sensors.
For example, the user determines which measuring principles are used for level measurement, which power supply should be provided to the device and which kind of signal transmission should be used. Usually, the cables shown in the wiring schemes as simple connection lines between sensor and SPS are problematic. This poses a fascinating paradox in the automation technology ? a sensor is tested for highest demands to assure it meets the requirements of the application form, whereas a cable is merely seen as a component which supposedly guarantees a reliable connection under all circumstances.
However, cables and connectors pose one of the most frequent resources of error. This is often where unforeseen prospect of increasing machine availability are available. During my course of research I learned that in a high two-digit percentage of most 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 precise application. Principally, there is absolutely 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 because of the lack of permanent leak tightness. For machine tools which are set up in factory buildings, the easiest cable materials with a simple M12 connector are employed. In this case, however, the usage of the right cable that permanently withstands ambient conditions such as for example temperature fluctuations and that features resistance against oils and fats can significantly increase the availability of your machine.
Using cable assemblies with factory pre-assembled connectors also prevents failure risk through improper on-site assembly. Therefore Toxic is a fallacy that cables will be the same and that any given cable with the sufficient number of wires would work for an application.
In another of my previous articles, I drew up a short overview of probably the most relevant criteria for choosing cables and connectors. Invest some time in specifying the right cable for your application. Think about the demands your plug connection to sensors and PLC must meet. An individually matched wiring concept offers a measurable increase of the machine availability and higher safety during operation.
Should you need assistance or consulting for specifying the right pressure sensor and associated cable / connector, feel absolve to contact us.