In Fieldbus, What Will Happen If The Trunk Or A Spur Is Short-circuited?

  • Bus-powered devices will lose power, so will not function. (Valve actuators should automatically adopt a safe position.) On return of power, they should restart automatically, with or without operator intervention as desired by the user.
  • Communication will be lost (even to non-bus-powered devices). On removal of the short circuit, the network will recover automatically.
  • The power supply should include current limiting, so it would not be damaged, and will recover when the short is removed.