Poor 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 amount 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 ought to be provided to the device and which type 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 ? a sensor is tested for highest demands to assure it meets the requirements of the application form, whereas a cable is only regarded 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 exactly 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 because of faulty installation, handling and especially due to the selection of an unsuited cable for the specific application. Principally, there is no patent remedy for determining which cable and which plug connector is most beneficial suitable for the application.
For instance, flexibility demands for cables used in level probes for level measurement in deep wells aren?t high, whereas the demands on tensile strength together with high longitudinal and transverse water tightness are. In level probes, plug connectors are barely ever applied due to the insufficient permanent leak tightness. For machine tools which are create in factory buildings, the simplest cable materials with a simple M12 connector are used. In this case, however, the usage of the right cable that permanently withstands ambient conditions such as 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 number of wires would work for an application.
In another of my previous articles, I drew up a brief overview of probably the most relevant criteria for choosing cables and connectors. Invest some time in specifying the right cable for the application. Think about the demands your plug connection to sensors and PLC must meet. An individually matched wiring concept supplies 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 free to contact us.