Length Of Profibus Cables - Siemens SIMOTION D410-2DP/PN Installation Manual

Connecting
4.8 Connecting PROFIBUS/MPI
Connector features
The bus connector is used to connect the PROFIBUS cable to the PROFIBUS DP interfaces.
thus establishing a connection to additional nodes.
Table 4-4
PROFIBUS DP/MPI interface
PROFIBUS DP interface
You will find an overview of the bus connectors available for order in the
Manual, Section "Spare parts and accessories".
4.8.3

Length of PROFIBUS cables

Cable lengths and baud rate
The baud rate determines the cable length of a subnet segment.
Table 4-5
Baud rate
19.6 to 187.5 kbit/s
500 kbit/s
1.5 Mbit/s
3 to 12 Mbit/s
With isolated interface
1)
Longer cable lengths
If you must implement longer cable lengths than permitted in one segment, you must use
RS 485 repeaters. The maximum possible cable lengths between two RS 485 repeaters
correspond to the cable length of a segment. You can connect up to nine RS 485 repeaters
in series.
Note that an RS 485 repeater must be counted as a subnet node when determining the total
number of nodes to be connected, even if it does not have its own PROFIBUS address.
62
SIMOTION D410-2 PROFIBUS interfaces
Permitted cable length of a subnet segment for specific baud rates
D410-2 DP
X21
X24
Max. cable length of a segment (in m)
1000
1)
400
200
100
Commissioning and Hardware Installation Manual, 01/2015
D410-2 DP/PN
X21
–
SIMOTION D410-2
SIMOTION D410-2