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Table shows the recommended specification for cables.
Table - Profibus Cable Specification
Measure |
Range |
Impedance |
135 … 165 Ω |
Capacitance |
< 30 pF / m |
Resistance |
< 110 Ω / km |
Wire Diameter |
> 0,64 mm |
Conductor cross section |
> 0,34 mm² |
Dependency between the maximum cable length an the baud-rate is given in the following table.
Table - Baud Rate & Max Cable Length
Baud rate [kbit/s] |
Max. cable length [m] |
9.6 |
1200 |
19.2 |
|
31.25 |
|
45.45 |
|
93.75 |
|
187.5 |
1000 |
500 |
400 |
1500 |
200 |
3000 |
100 |
6000 |
|
12000 |