Siemens SINAMICS DCM Manual page 429

Descriptions of functions
10.4 Communication via PROFIBUS DP
Bus connector
The cables must be connected using PROFIBUS bus connectors as these contain the
necessary bus terminating resistors.
Matching PROFIBUS bus connector, article no. 6GK1500-0FC10:
Figure 10-11 PROFIBUS bus connector
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.
Principle: The terminating resistors must only be switched on at both ends of the bus line;
the resistors must be switched off at all other connectors.
The cable shield must be connected at both ends and over a large surface area.
Figure 10-12 Position of the bus terminating resistors
430
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
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SINAMICS DCM DC Converter