Lenze PROFIBUS Controller-based Automation - Manual (Page 24)

5 Technical data
5.2 Bus cable specification
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Lenze · Controller-based Automation · PROFIBUS® Communication Manual · DMS 4.3 EN · 04/2014 · TD17
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5.2 Bus cable specification
PROFIBUS cables with an integrated bus terminating resistor can be obtained from various cable
manufacturers.
Bus cable length
The length of the bus cable depends on the baud rate used:

Note!
Only use cables that comply with the specifications of the PROFIBUS user organisation.
Area Values
Cable resistance 135 ... 165 /km, (f = 3 ... 20 MHz)
Capacitance per unit length  30 nF/km
Loop resistance < 110 /km
Core diameter > 0.64 mm
Core cross-section > 0.34 mm 2
Cores Twisted in pairs, insulated and shielded
Baud rate Length
9.6 ... 93.75 kbps 1200 m
187.5 kbps 1000 m
500 kbps 400 m
1500 kbps 200 m
3000 ... 12000 kbps 100 m

Note!
The baud rate depending on the data volume, cycle time and number of stations should
only be selected as high as required for the application.