2               Terminology

The following terms are used in this document:

PCE Tag/Main Function

The PCE tag comprises all components required for the implementation of a measuring or control task. PCE tags are represented by function objects in Engineering Base. The information relevant for the intrinsic safety is collected here. Among other things, these are the attributes Proof of intrinsic safety, Calculation status 1 …, Calculation status 5 and the Calculation date.

Measuring Circuit

Group of devices below a main function.

PCE Tag Element

The components of the PCE tags required for the measuring or control tasks are called PCE tag elements which could be sensors or actors but also connection components, such as cables or terminals.

Source/Active, Feeding Item

Device that supplies the circuit.

Target/Passive, Consuming Item

Device that consumes electricity.