Siemens Simovert Masterdrives Compendium page 381

09.2008
NOTICE
Pulling out the bus
connector
Connection example
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES
A bus segment must always be terminated at both ends with a matching
resistor. This is not the case, for example, if the last slave with bus
connector is not live. Because the bus connector obtains its voltage from
the station, the matching resistor has no effect.
Make sure that the stations at which the matching resistor is connected is
always supplied with voltage.
You can pull out the bus connector with looped-through bus cable from
the PROFIBUS-DP interface at any time without interrupting data transfer
on the bus.
First bus node
Bus
termination
From preceding bus node
Fig. 8.2-14 Bus segment in linear structure (max. 32 stations per segment)
Compendium Motion Control
Communication / PROFIBUS
Other bus nodes
Bus
termination
To next bus node
Last bus node
8.2-51