Introduction
2.1 Introduction
SIMATIC NET PROFIBUS Optical Link Module OLM V4.0
Operating Instructions, 01/2013, C79000-G8976-C270-03
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The PROFIBUS OLMs comply with the standard EN 50170 /2/ and with the technical
guideline “Optical transmission technology for PROFIBUS” published by the PROFIBUS
User Organization (PNO).
OLM / G12 and OLM / G12-EEC have the same functions. They only differ in the
specification of the ambient climatic conditions: the OLM / G12 is suitable for use in the
standard temperature range from 0 °C to 60 °C, whereas the OLM / G12-EEC (extended
environmental conditions) can be used in the extended temperature range of -25 °C to +60
°C and up to 100% humidity (condensing).
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