Profibus is an industry-standard communications bus protocol used in process automation and sensor networks using programmable logic controllers. Understanding how the networks function will be beneficial to any plant engineer having to deal with PLC problems.
The main aim of an insulating material is to separate electrical conductors without passing current from one to the other and to safeguard individuals from electrically energized wires and parts. A complete knowledge of insulating materials and standards for safe working practices is required.
Electrical system grounding is directly related to human safety. Electrical systems are grounded, or earthed, in order to obtain a low resistance path for the dissipation of current into the earth. Earthing should be measured routinely to maintain the resistance below a required value.
Rotating machines tend to vibrate, so vibration analysis on a regular basis is needed to predict the operational health of equipment and provide fault analysis. It’s the job of the maintenance engineer to provide a preventive maintenance program, including using the concepts of vibration analysis.