scope:

IEC 60617-12 and IEC 60617-13 establish rules for the construction of graphical symbols that represent binary logic and analogue functions, respectively. Each standard provides alternative ways of representing functions, to be used as circumstances dictate. A working group with members from the Netherlands, Sweden and the UK has developed conventions, helpful when applying IEC 60617-12 and IEC 60617-13 to symbols for catalogues. This technical report shows which choices the working group has made where IEC 60617-12 and IEC 60617-13 provide alternative techniques. It also helps to create symbols having as consistent an appearance as possible, not depending on the originator, while still accurately representing the function.

Furthermore, it establishes additional conventions for cases not (yet) covered by IEC 60617-12 and IEC 60617-13, but these conventions were found to be lacking when creating symbols for existing devices. Those conventions will be proposed to be introduced in IEC 60617-12 and IEC 60617-13, but are already given in this report to provide help to symbol developers as early as possible.

Finally, in some cases, this report summarizes information spread over several IEC publications and which therefore may be hard to find.