Acknowledging an input fault

An input fault can occur if one of the following functions is assigned to a two‑channel safe digital input F‑DI in the function assignment:

  • SBT clearance
  • SLI increment enable
  • Unlatch F-DI
  • Unlatch F-DI and acknowledge fault
  • Muting
  • Activate test mode.

Before acknowledging an input fault, ensure the following:

  • No person is in the hazardous area of the system.
  • No DC 24 V signal is present at the corresponding inputs.