Design of Transformer Temperature Monitoring Acquisition Module Based on CANOPEN Bus

An intelligent distributed multi-channel temperature transmitter for transformer based on CANOPEN was designed.Taking AT90CAN128 as core,the temperature measure of 8-channel thermal resistance or thermocouple was realized simultaneously,and the measure results were send to CANOPEN master node by the module.Test result shows that data communication between master and slave is reliable and accurate,and real time meets demand of control system.