Lenze PROFIBU PC-based Automation - Manual (Page 21)

DMS 2.2 EN 07/2011 TD17
L
21
Control technology | PROFIBUS communication manual
Technical data
Bus cable specification
5.2 Bus cable specification
Please follow the specifications of the PROFIBUS user organisation for bus cables.
Baud rate / bus cable length
Adapt the baud rate to the length of the bus cable.
Field Values
Cable resistance 135 ... 165 Ω/km, (f = 3 ... 20 MHz)
Capacitance per unit length ≤ 30 nF/km
Loop resistance < 110 Ω/km
Core diameter > 0.64 mm
Core cross-section > 0.34 mm 2
Cores Twisted in pairs, insulated and shielded
Baud rate [kbps] Max. bus length [m]
9.6 ... 93.75 1200
187.5 1000
500 200
1500 200
3000 ... 12000 100

Note!
The baud rate depending of the data volume, cycle time, and number of stations
should only be selected as high as required for the application.