SLVAF72 September   2021 TPS2661

 

  1.   Trademarks
  2. 1Overview of a HART Enabled Analog Input Module
  3. 2Protection Provided by TPS2661 to Analog Input Module
    1. 2.1 Overload Protection
    2. 2.2 Output Hot Short and Input Hot Plug
    3. 2.3 Miswiring on Input
    4. 2.4 Input Under Voltage Protection
  4. 3Protection Provided by TPS2661 to Analog Output Module (AOM)
    1. 3.1 Miswiring on Output
    2. 3.2 Output under voltage protection
  5. 4HART Tests Done on TPS2661x
  6. 5Challenges Using Discrete Solution Instead of TPS2661x

2.3 Miswiring on Input

In an industrial application, it is possible that a field power supply can be miswired to a current input. During miswiring to field power source, a large voltage can appear across the ADC inputs, burden resistor or current limiting element and burn it. TPS2661x clamps the input voltage to the system power rail and provides current limiting feature to avoid any damages caused by this miswiring.