Siemens SIMATIC NET Operating Instructions Manual page 12

Description of the device
2.3 Properties and functions
Note
BFOC
BFOC stands for Bayonet Fiber Optic Connector. This connector type is functionally
compatible with ST
Note
PCF
PFC stands for Polymer Cladded Fiber and is synonymous with HCS
of the Ensign-Bickford Optics Company.
Basic functions
There is a measurement output available for every channel at which the optical input level
can be measured with a commercially available voltmeter.
The various error and disruption messages of the OLM are available as a group signal via a
signaling contact for further processing. The signaling contact is a relay with floating
contacts.
The individual modes as well as error/fault messages are displayed by several multicolor
LEDs on the front panel of the device, refer to the section "LED display (Page 13)".
The mechanical construction consists of a compact, stable metal housing that can be
mounted either on a DIN rail or on a mounting plate.
The modules are configured using switches that are easily accessible from the outside.
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 function. They only differ in the specification
of the ambient climatic conditions: While the OLM / G12 is suitable for use in the standard
temperature range from 0 °C to 60 °C, the OLM / G12-EEC (extended environmental
conditions) can be used in the extended temperature range of -25 °C to +60 °C and in up to
100% humidity (condensing).
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connectors. ST is a registered trademark of the AT&T company.
®
®
Operating Instructions, 01/2020, C79000-G8976-C270-06
. HCS is a trademark
®
Optical link module