SCDA038 September   2021 TMUX7308F , TMUX7411F , TMUX7412F , TMUX7413F , TMUX7462F

 

  1.   Trademarks
  2. 1 Potential Fault Conditions on PLC Analog Input Modules
  3. 2How Does a Fault Protected Multiplexer Protect the System
  4. 3Key Care Abouts when Implementing a Fault Protected Multiplexer into an Analog I/O Module
  5. 4Summary
  6. 5References

Summary

In this application note a few ideas were explored. First, some common fault conditions for Analog Input Modules were examined and how they can impose a risk to a system’s reliability. Then using the fault protection features offered by TI’s Fault Protected Switches and Multiplexers it was shown that these common fault conditions can be handled by a Fault Protected Switch or Multiplexer. Finally, the key care-abouts to when implementing a TI Fault Protected Switch or Multiplexer to optimize not only protection but system performance, cost, and solution size. Table 4-1 shows devices available now built with integrated fault protection features.

Table 4-1 Fault Protected Multiplexers and Switches On TI.com
DeviceConfigurationChannel CountSingle Supply RangeDual Supply Range
TMUX7308F8:118 V to 44 V+/- 5 V to +/- 22 V
TMUX7412F1:148 V to 44 V+/- 5 V to +/- 22 V
TMUX7462F1:148 V to 44 V+/- 5 V to +/- 22 V