The choice of the proper cable or line for transmitting signals on your machine has essential influence on the machine availability. Usually, when determining the instruments of machines and plants, a profound amount of attention is directed at deciding on the best sensors.
For example, the user determines which measuring principles are employed for level measurement, which power should be provided to the machine 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 a fascinating paradox in the automation technology ? a sensor is tested for highest demands to make sure it meets the requirements of the application, whereas a cable is only seen as a component which supposedly guarantees a trusted connection under all circumstances.
However, cables and connectors pose probably the most frequent sources 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 because of faulty installation, handling and especially as a result of choice of an unsuited cable for the precise application. Principally, there is no patent remedy for determining which cable and which plug connector is best suitable for your application.
For example, flexibility demands for cables found in level probes for level measurement in deep wells aren?t high, whereas the demands on tensile strength along with high longitudinal and transverse water tightness are. In เกจวัดแรงดัน , plug connectors are barely ever applied as a result of insufficient permanent leak tightness. For machine tools which are setup in factory buildings, the simplest cable materials with a straightforward 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 has resistance against oils and fats can significantly raise 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 is suitable 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. Take into account the demands your plug link with 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 a suitable pressure sensor and associated cable / connector, feel free to contact us.