Siemens SINAMICS G150 Operating Instructions Manual page 340

Converter cabinet units 75 kw to 1500 kw
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Operation
6.8 Communication via PROFIBUS DP
Bus terminating resistor
The bus terminating resistor must be switched on or off depending on its position in the bus,
otherwise the data will not be transmitted properly.
The terminating resistors for the first and last nodes in a line must be switched on; the
resistors must be switched off at all other connectors.
The cable shield must be connected at both ends over large-surface area contacts.
Note
Depending on the connector type, the correct assignment of the connector must be ensured
(IN/OUT) in conjunction with the terminating resistor.
Figure 6-36
338
Position of the bus terminating resistors
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A

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