Lenze 931W - Manual (Page 14)

Electrical installation 4
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14 K-HB 13.0001-EN 2.1
4 Electrical installation
Structure of a PROFIBUS-DP network with RS485 cabling without repeater
3 3 3
1
2 2 2
0 m 1200 m
931M
931W 931M
931W 931M
931W
931m_021
No. Element Note
1 Master computer e.g. PC or PLC with PROFIBUS-DP master interface module
2 Bus cable Adapt baud rate to the length of the bus cable.
3 PROFIBUS-DP slave Applicable basic device
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Note!
When using a repeater, max. 125 stations can communicate via the PROFIBUS.
EMC-compliant wiring
For wiring according to EMC please observe the following points:

Note!
ƒ Separate control cables from motor cables.
ƒ Connect the shields of the control or data cables as follows:
– On both sides for cables with digital signals.
ƒ Further notes on wiring according to EMC can be obtained from the
instructions of the basic unit.
Wiring procedure
1. Do not change the bus topology, i.e. do not use stubs.
2. Observe the wiring notes given in the documentation for the control system.
3. Only use cables which correspond to the listed specifications.
4. Activate the bus terminating resistors at the first and last physical station.