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Commissioning
Note
Make sure that the PROFIBUS OBT is adequately grounded by connecting the DIN rail or
mounting plate to local ground with low resistance and inductance. When securing the
module to a mounting plate, run a cable from the grounding terminal of the OBT to the
nearest possible ground, keeping the cable as short as possible.
The shield of the PROFIBUS cable must be contacted. To do this, strip the insulation from
the end of the PROFIBUS cable and connect the shield to functional earth.
Note
Only use bus cables approved for PROFIBUS as the RS-485 bus cable.
Note
The OBT housing must not be opened.
General notices on use in hazardous areas
Risk of explosion when connecting or disconnecting the device
WARNING – EXPLOSION HAZARD
DO NOT CONNECT OR DISCONNECT EQUIPMENT WHEN A FLAMMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.
WARNING – EXPLOSION HAZARD
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE
NON-HAZARDOUS.
WARNING – EXPLOSION HAZARD
SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION
2.
18
WARNING
WARNING
WARNING
PROFIBUS Optical Bus Terminal (OBT)
Operating Instructions, 04/2016, C79000-G8976-C122-07
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