Temperature Monitoring System using an Infrared Temperature Sensor Connected to a PLC

In industrial systems, there are various situations, in which it’s difficult to monitor the temperature at a key point of an electrical equipment such as high power breaking breaks, automatic entrances, current paths, contact lines, force contacts from normal separations or load medium or high voltage circuits in electric power train systems or electric traction systems. In this paper we present a system for on-line monitoring of the temperature on the contact high voltage surface from a medium voltage monopolar separator used in the electric railway traction. An infrared temperature transducer is used which converts the temperature value into an electric signal in the 0-10v range. This electrical signal is used as an analogue input size for a Siemens S7-1200 PLC. An application was developed that monitors online temperature on the strength of the contact force, allowing the HMI monitor to view the temperature value, the actual size, and also the graphical evolution of the temperature values over a period of time. It also shows the experimental installation, the electrical drawing, the temperature value must fit within a certain acceptable range.