SCDA046 January   2024 TMUX7308F , TMUX7309F , TMUX7348F , TMUX7349F , TMUX7411F , TMUX7412F , TMUX7413F , TMUX7436F , TMUX7462F

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Fault Protected Multiplexer Operation in System and Requirements for EFT Burst Testing
  5. 2System Level Protection Explanation and Design Based on Fast Fault Recovery Time
  6. 3System Level Lab Test Procedure and Results of EFT Burst Testing
  7. 4Conclusion
  8. 5References

Abstract

Electrical fast transients (EFT) are a series of high voltage, fast frequency pulses that can strike analog input and output modules in a factory automation programmable logic controller (PLC) system. EFT bursts typically come from cables surrounding PLC systems and can interrupt data or power through inductive or capacitive couplings. Because of the adverse effects introduced in harsh industrial environments, PLC systems require protection against EFT burst, and permanent miswiring. This document explains how TI’s fault-protected multiplexers can be designed into a system to protect signal chain devices from harmful high-voltage signals while simultaneously allowing for continued communication between devices during burst events.