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EMC Measures for the Communications Adapter
Central Discharge Function for the PROFIBUS DP
Central Discharge Function
Each cable shield should be galvanically grounded with the earth using FE/PE
grounding clamps immediately after the cable has been connected to the cabinet.
Static Discharge
In the case of a very long bus cable, which has been installed but not yet connected,
you must discharge the static as follows:
Step
1
Action
Select the PROFIBUS DP connector closest to the FE/PE grounding clamp.
2 Touch the metal of the connector housing to the cabinet’s FE/PE grounding clamp
to carry out a static discharge.
3 Now connect the bus connector to the device.
4 Discharge the other PROFIBUS DP cable connectors as described in steps 2 and 3.
Note
NOTE: During mounting, the metal part of the PROFIBUS DP connector is
connected internally to the cable shield. When the bus cable connector is inserted
into the module’s PROFIBUS port, a short connection between the shield and the
FE/PE is created automatically.
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709609 07/2011