Research and Design of Signaling Surge Protective Device in the Industrial Control Systems
Xiangchao Li · Insulators and Surge Arresters · 2011
Based on the characteristics of transmission signaling in industrial control systems,for industrial sensor which output 4~20 mA DC signals,and combined with theoretical analysis,there came out a design project about the signaling SPD with filtering structure.Through a large number of experiments and the Cadence circuit simulation,it verified that the signal SPD had good filter discrimination.And under the impulse tests of surge current,it can effectively limit the residual voltage within the tolerance which the device can take.The SPD which improved decoupling network portion can not only inhibit the lightning wave,but also filter out high frequency interference signal in the industrial control system,ensuring that the signal transmission system is stable.