Interference-Free EtherCAT Terminals

If an EtherCAT Terminal is described as interference-free, this means that the consecutive terminal behaves passively in a safety application (e.g., the all-pole switch-off of a po-tential group).

In this case, the terminals do not represent an active part of the safety controller and do not affect the Safety Integrity Level (SIL) or Performance Level (PL) attained in the safety application.