The selection of the proper cable or line for transmitting signals on your own machine has essential influence on the machine availability. Usually, when determining the instruments of machines and plants, a profound level of attention is given to choosing the right sensors.
For example, the user determines which measuring principles are used for level measurement, which power should be provided to the machine 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 make sure it meets certain requirements of the application, whereas a cable is merely regarded 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 exactly where unforeseen prospect of increasing machine availability can be found. During my span 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 because of the selection of an unsuited cable for the precise application. Principally, there is absolutely no patent fix 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 and also 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 easiest cable materials with a simple M12 connector are employed. In At Ease , however, the use of a suitable cable that permanently withstands ambient conditions such as 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. Therefore it is a fallacy that all cables are the same and that any given cable with the sufficient number of wires is suitable for an application.
In one of my previous articles, I drew up a brief overview of the most relevant criteria for choosing cables and connectors. Invest some time in specifying the right cable for your 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 absolve to contact us.