Technical data

Active components
4.1 Active components for RS485 networks
PROFIBUS Network Manual
68 System Manual, Edition 04/2009, C79000-G8976-C124-03
● Help is required during commissioning
– Switch for disconnecting segments
– Display of bus activity
– Disconnecting a segment when the terminator is incorrectly activated
● The signal amplitude and time need to be regenerated
Figure 4-1 RS-485 repeater
Please note that there is also a diagnostics repeater that in addition to the normal repeater
functionality provides extensive diagnostics functions for troubleshooting the physical cable,
see Section
Diagnostics repeater for PROFIBUS DP (Page 77)
Rule
If you want to install a PROFIBUS network with RS485 repeaters, you can connect a
maximum of nine RS485 repeaters in series.